////////////////////////////////////////////////////////////////
//
//			AMaZE demosaic algorithm
// (Aliasing Minimization and Zipper Elimination)
//
//	copyright (c) 2008-2010  Emil Martinec <ejmartin@uchicago.edu>
//
// incorporating ideas of Luis Sanz Rodrigues and Paul Lee
//
// code dated: May 27, 2010
//
//	amaze_interpolate_RT.cc is free software: you can redistribute it and/or modify
//	it under the terms of the GNU General Public License as published by
//	the Free Software Foundation, either version 3 of the License, or
//	(at your option) any later version.
//
//	This program is distributed in the hope that it will be useful,
//	but WITHOUT ANY WARRANTY; without even the implied warranty of
//	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//	GNU General Public License for more details.
//
//	You should have received a copy of the GNU General Public License
//	along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////



void RawImageSource::amaze_demosaic_RT() {  

#undef MAX
#undef MIN
#undef CLIP
	
#define SQR(x) ((x)*(x))
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#define LIM(x,min,max) MAX(min,MIN(x,max))
#define ULIM(x,y,z) ((y) < (z) ? LIM(x,y,z) : LIM(x,z,y))
#define CLIP(x) LIM(x,0,65535)
	
	
	int width=W, height=H;
	red = new unsigned short*[H];
	for (int i=0; i<H; i++) {
		red[i] = new unsigned short[W];
	}
	green = new unsigned short*[H];
	for (int i=0; i<H; i++) {
		green[i] = new unsigned short[W];
	}	
	blue = new unsigned short*[H];
	for (int i=0; i<H; i++) {
		blue[i] = new unsigned short[W];
	}
	
#define TS 512	 // Tile size; the image is processed in square tiles to lower memory requirements and facilitate multi-threading
	
	// local variables

	int top, left;
	int ex, ey;
	static const int v1=TS, v2=2*TS, v3=3*TS, p1=-TS+1, p2=-2*TS+2, p3=-3*TS+3, m1=TS+1, m2=2*TS+2, m3=3*TS+3;
	static const int nbr[5] = {-v2,-2,2,v2,0};
	
	static const float eps=1e-5;			//tolerance to avoid dividing by zero
	static const float epssq=1e-10;			//tolerance to avoid dividing by zero

	static const float arthresh=0.75;
	static const float nyqthresh=0.5;//0.5
	static const float pmthresh=0.25;//0.25
	static const float lbd=1.0, ubd=1.0;//lbd=0.66, ubd=1.5;
	
	static const float gaussodd[4] = {0.14659727707323927f, 0.103592713382435f, 0.0732036125103057f, 0.0365543548389495f};//gaussian on 5x5 quincunx, sigma=1.2
	static const float gaussgrad[6] = {0.07384411893421103f, 0.06207511968171489f, 0.0521818194747806f, \
	0.03687419286733595f, 0.03099732204057846f, 0.018413194161458882f};//gaussian on 5x5, sigma=1.2
	static const float gauss1[3] = {0.3376688223162362f, 0.12171198028231786f, 0.04387081413862306f};//gaussian on 3x3, sigma =0.7
	static const float gausseven[2] = {0.13719494435797422f, 0.05640252782101291f};//gaussian on 5x5 alt quincunx, sigma=1.5
	static const float gquinc[4] = {0.169917f, 0.108947f, 0.069855f, 0.0287182f};
	
	
	// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

	char		*buffer;			// TS*TS*168
	float         (*rgb)[3];		// TS*TS*12
	float         (*delh);			// TS*TS*4
	float         (*delv);			// TS*TS*4
	float         (*delhsq);		// TS*TS*4
	float         (*delvsq);		// TS*TS*4
	float         (*dirwts)[2];		// TS*TS*8
	float         (*vcd);			// TS*TS*4
	float         (*hcd);			// TS*TS*4
	float         (*vcdalt);		// TS*TS*4
	float         (*hcdalt);		// TS*TS*4
	float         (*vcdsq);			// TS*TS*4
	float         (*hcdsq);			// TS*TS*4
	float         (*cddiffsq);		// TS*TS*4
	float         (*hvwt);			// TS*TS*4
	float         (*Dgrb)[2];		// TS*TS*8
	float         (*delp);			// TS*TS*4
	float         (*delm);			// TS*TS*4
	float         (*rbint);			// TS*TS*4
	float         (*Dgrbh2);		// TS*TS*4
	float         (*Dgrbv2);		// TS*TS*4
	float         (*dgintv);		// TS*TS*4
	float         (*dginth);		// TS*TS*4
	float         (*Dgrbp1);		// TS*TS*4
	float         (*Dgrbm1);		// TS*TS*4
	float         (*Dgrbpsq1);		// TS*TS*4
	float         (*Dgrbmsq1);		// TS*TS*4
	float         (*cfa);			// TS*TS*4
	float         (*pmwt);			// TS*TS*4
	float         (*rbp);			// TS*TS*4
	float         (*rbm);			// TS*TS*4
	
	int			(*nyquist);			// TS*TS*4
	
	
	// assign working space
	buffer = (char *) malloc((34*sizeof(float)+sizeof(int))*TS*TS);
	//merror(buffer,"amaze_interpolate()");
	memset(buffer,0,(34*sizeof(float)+sizeof(int))*TS*TS);
	// rgb array
	rgb         = (float (*)[3])		buffer; //pointers to array
	delh		= (float (*))			(buffer +  3*sizeof(float)*TS*TS);
	delv		= (float (*))			(buffer +  4*sizeof(float)*TS*TS);
	delhsq		= (float (*))			(buffer +  5*sizeof(float)*TS*TS);
	delvsq		= (float (*))			(buffer +  6*sizeof(float)*TS*TS);
	dirwts		= (float (*)[2])		(buffer +  7*sizeof(float)*TS*TS);
	vcd			= (float (*))			(buffer +  9*sizeof(float)*TS*TS);
	hcd			= (float (*))			(buffer +  10*sizeof(float)*TS*TS);
	vcdalt		= (float (*))			(buffer +  11*sizeof(float)*TS*TS);
	hcdalt		= (float (*))			(buffer +  12*sizeof(float)*TS*TS);
	vcdsq		= (float (*))			(buffer +  13*sizeof(float)*TS*TS);
	hcdsq		= (float (*))			(buffer +  14*sizeof(float)*TS*TS);
	cddiffsq	= (float (*))			(buffer +  15*sizeof(float)*TS*TS);
	hvwt		= (float (*))			(buffer +  16*sizeof(float)*TS*TS);
	Dgrb		= (float (*)[2])		(buffer +  17*sizeof(float)*TS*TS);
	delp		= (float (*))			(buffer +  19*sizeof(float)*TS*TS);
	delm		= (float (*))			(buffer +  20*sizeof(float)*TS*TS);
	rbint		= (float (*))			(buffer +  21*sizeof(float)*TS*TS);
	Dgrbh2		= (float (*))			(buffer +  22*sizeof(float)*TS*TS);
	Dgrbv2		= (float (*))			(buffer +  23*sizeof(float)*TS*TS);	
	dgintv		= (float (*))			(buffer +  24*sizeof(float)*TS*TS);
	dginth		= (float (*))			(buffer +  25*sizeof(float)*TS*TS);
	Dgrbp1		= (float (*))			(buffer +  26*sizeof(float)*TS*TS);
	Dgrbm1		= (float (*))			(buffer +  27*sizeof(float)*TS*TS);
	Dgrbpsq1	= (float (*))			(buffer +  28*sizeof(float)*TS*TS);
	Dgrbmsq1	= (float (*))			(buffer +  29*sizeof(float)*TS*TS);
	cfa			= (float (*))			(buffer +  30*sizeof(float)*TS*TS);
	pmwt		= (float (*))			(buffer +  31*sizeof(float)*TS*TS);
	rbp			= (float (*))			(buffer +  32*sizeof(float)*TS*TS);
	rbm			= (float (*))			(buffer +  33*sizeof(float)*TS*TS);
	
	nyquist		= (int (*))				(buffer +  34*sizeof(float)*TS*TS);
	
	// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	
	/*double dt;
	 clock_t t1, t2;
	 
	 clock_t t1_init,       t2_init       = 0;
	 clock_t t1_vcdhcd,      t2_vcdhcd      = 0;
	 clock_t t1_cdvar,		t2_cdvar = 0;
	 clock_t t1_nyqtest,   t2_nyqtest   = 0;
	 clock_t t1_areainterp,  t2_areainterp  = 0;
	 clock_t t1_compare,   t2_compare   = 0;
	 clock_t t1_diag,   t2_diag   = 0;
	 clock_t t1_chroma,    t2_chroma    = 0;*/
	
	
	// start
	//if (verbose) fprintf (stderr,_("AMaZE interpolation ...\n"));
	//t1 = clock();
	
	// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	
	if (plistener) {
		plistener->setProgressStr ("AMaZE Demosaicing...");
		plistener->setProgress (0.0);
	}
	
	// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	
	
	//determine GRBG coset; (ey,ex) is the offset of the R subarray
	if (FC(0,0)==1) {//first pixel is G
		if (FC(0,1)==0) {ey=0; ex=1;} else {ey=1; ex=0;}
	} else {//first pixel is R or B
		if (FC(0,0)==0) {ey=0; ex=0;} else {ey=1; ex=1;}
	}
	
	// Main algorithm: Tile loop
	//#pragma omp parallel for shared(ri->data,height,width,red,green,blue) private(top,left) schedule(dynamic)
	//code is openmp ready; just have to pull local tile variable declarations inside the tile loop
	for (top=-16; top < height; top += TS-32)
		for (left=-16; left < width; left += TS-32) {
			int bottom = MIN( top+TS,height+16);
			int right  = MIN(left+TS, width+16);
			int rr1 = bottom - top;
			int cc1 = right - left;
			
			//tile vars	
			int row, col;
			int rrmin, rrmax, ccmin, ccmax;
			int rr, cc, c, indx, indx1, dir, i, j, sgn;
			
			float crse, crnw, crne, crsw, rbse, rbnw, rbne, rbsw, wtse, wtnw, wtsw, wtne;
			float pmwtalt;
			
			float cru, crd, crl, crr;
			float vwt, hwt, pwt, mwt, Gintv, Ginth;
			float guar, gdar, glar, grar, guha, gdha, glha, grha, Ginthar, Ginthha, Gintvar, Gintvha, hcdaltvar, vcdaltvar;
			float Dgrbvvaru, Dgrbvvard, Dgrbhvarl, Dgrbhvarr;
			float sumh, sumv, sumsqh, sumsqv, areawt;
			float nyqtest, vcdvar, hcdvar, hvwtalt, vo, ve, gradp, gradm, gradv, gradh, gradpm, gradhv;
			float vcdvar1, hcdvar1, varwt, diffwt;
			float rbvarp, rbvarm;
			float gu, gd, gl, gr;
			float gvarh, gvarv;	
			
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
/*			
			char		*buffer;			// TS*TS*168
			float         (*rgb)[3];		// TS*TS*12
			float         (*delh);			// TS*TS*4
			float         (*delv);			// TS*TS*4
			float         (*delhsq);		// TS*TS*4
			float         (*delvsq);		// TS*TS*4
			float         (*dirwts)[2];		// TS*TS*8
			float         (*vcd);			// TS*TS*4
			float         (*hcd);			// TS*TS*4
			float         (*vcdalt);		// TS*TS*4
			float         (*hcdalt);		// TS*TS*4
			float         (*vcdsq);			// TS*TS*4
			float         (*hcdsq);			// TS*TS*4
			float         (*cddiffsq);		// TS*TS*4
			float         (*hvwt);			// TS*TS*4
			float         (*Dgrb)[2];		// TS*TS*8
			float         (*delp);			// TS*TS*4
			float         (*delm);			// TS*TS*4
			float         (*rbint);			// TS*TS*4
			float         (*Dgrbh2);		// TS*TS*4
			float         (*Dgrbv2);		// TS*TS*4
			float         (*dgintv);		// TS*TS*4
			float         (*dginth);		// TS*TS*4
			float         (*Dgrbp1);		// TS*TS*4
			float         (*Dgrbm1);		// TS*TS*4
			float         (*Dgrbpsq1);		// TS*TS*4
			float         (*Dgrbmsq1);		// TS*TS*4
			float         (*cfa);			// TS*TS*4
			float         (*pmwt);			// TS*TS*4
			float         (*rbp);			// TS*TS*4
			float         (*rbm);			// TS*TS*4
			
			int			(*nyquist);			// TS*TS*4
			
			
			// assign working space
			buffer = (char *) malloc(35*sizeof(float)*TS*TS);
			//merror(buffer,"amaze_interpolate()");
			memset(buffer,0,35*sizeof(float)*TS*TS);
			// rgb array
			rgb         = (float (*)[3])		buffer; //pointers to array
			delh		= (float (*))			(buffer +  3*sizeof(float)*TS*TS);
			delv		= (float (*))			(buffer +  4*sizeof(float)*TS*TS);
			delhsq		= (float (*))			(buffer +  5*sizeof(float)*TS*TS);
			delvsq		= (float (*))			(buffer +  6*sizeof(float)*TS*TS);
			dirwts		= (float (*)[2])		(buffer +  7*sizeof(float)*TS*TS);
			vcd			= (float (*))			(buffer +  9*sizeof(float)*TS*TS);
			hcd			= (float (*))			(buffer +  10*sizeof(float)*TS*TS);
			vcdalt		= (float (*))			(buffer +  11*sizeof(float)*TS*TS);
			hcdalt		= (float (*))			(buffer +  12*sizeof(float)*TS*TS);
			vcdsq		= (float (*))			(buffer +  13*sizeof(float)*TS*TS);
			hcdsq		= (float (*))			(buffer +  14*sizeof(float)*TS*TS);
			cddiffsq	= (float (*))			(buffer +  15*sizeof(float)*TS*TS);
			hvwt		= (float (*))			(buffer +  16*sizeof(float)*TS*TS);
			Dgrb		= (float (*)[2])		(buffer +  17*sizeof(float)*TS*TS);
			delp		= (float (*))			(buffer +  19*sizeof(float)*TS*TS);
			delm		= (float (*))			(buffer +  20*sizeof(float)*TS*TS);
			rbint		= (float (*))			(buffer +  21*sizeof(float)*TS*TS);
			Dgrbh2		= (float (*))			(buffer +  22*sizeof(float)*TS*TS);
			Dgrbv2		= (float (*))			(buffer +  23*sizeof(float)*TS*TS);	
			dgintv		= (float (*))			(buffer +  24*sizeof(float)*TS*TS);
			dginth		= (float (*))			(buffer +  25*sizeof(float)*TS*TS);
			Dgrbp1		= (float (*))			(buffer +  26*sizeof(float)*TS*TS);
			Dgrbm1		= (float (*))			(buffer +  27*sizeof(float)*TS*TS);
			Dgrbpsq1	= (float (*))			(buffer +  28*sizeof(float)*TS*TS);
			Dgrbmsq1	= (float (*))			(buffer +  29*sizeof(float)*TS*TS);
			cfa			= (float (*))			(buffer +  30*sizeof(float)*TS*TS);
			pmwt		= (float (*))			(buffer +  31*sizeof(float)*TS*TS);
			rbp			= (float (*))			(buffer +  32*sizeof(float)*TS*TS);
			rbm			= (float (*))			(buffer +  33*sizeof(float)*TS*TS);
			
			nyquist		= (int (*))				(buffer +  34*sizeof(float)*TS*TS);
*/			
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			
			
			// rgb from input CFA data
			// rgb values should be floating point number between 0 and 1 
			// after white balance multipliers are applied 
			if (top<0) {rrmin=16;} else {rrmin=0;}
			if (left<0) {ccmin=16;} else {ccmin=0;}
			if (bottom>height) {rrmax=height-top;} else {rrmax=rr1;}
			if (right>width) {ccmax=width-left;} else {ccmax=cc1;}
			
			for (rr=rrmin; rr < rrmax; rr++)
				for (row=rr+top, cc=ccmin; cc < ccmax; cc++) {
					col = cc+left;
					c = FC(rr,cc);
					indx=row*width+col;
					indx1=rr*TS+cc;
					rgb[indx1][c] = (ri->data[row][col])/65535.0f;
					//rgb[indx1][c] = image[indx][c]/65535.0f;//for dcraw implementation

					cfa[indx1] = rgb[indx1][c];
				}
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			//fill borders
			if (rrmin>0) {
				for (rr=0; rr<16; rr++) 
					for (cc=ccmin; cc<ccmax; cc++) {
						c = FC(rr,cc);
						rgb[rr*TS+cc][c] = rgb[(32-rr)*TS+cc][c];
						cfa[rr*TS+cc] = rgb[rr*TS+cc][c];
					}
			}
			if (rrmax<rr1) {
				for (rr=0; rr<16; rr++) 
					for (cc=ccmin; cc<ccmax; cc++) {
						c=FC(rr,cc);
						rgb[(rrmax+rr)*TS+cc][c] = (ri->data[(height-rr-2)][left+cc])/65535.0f;
						//rgb[(rrmax+rr)*TS+cc][c] = (image[(height-rr-2)*width+left+cc][c])/65535.0f;//for dcraw implementation
						cfa[(rrmax+rr)*TS+cc] = rgb[(rrmax+rr)*TS+cc][c];
					}
			}
			if (ccmin>0) {
				for (rr=rrmin; rr<rrmax; rr++) 
					for (cc=0; cc<16; cc++) {
						c=FC(rr,cc);
						rgb[rr*TS+cc][c] = rgb[rr*TS+32-cc][c];           
						cfa[rr*TS+cc] = rgb[rr*TS+cc][c];
					}
			}
			if (ccmax<cc1) {
				for (rr=rrmin; rr<rrmax; rr++)
					for (cc=0; cc<16; cc++) {
						c=FC(rr,cc);
						rgb[rr*TS+ccmax+cc][c] = (ri->data[(top+rr)][(width-cc-2)])/65535.0f;
						//rgb[rr*TS+ccmax+cc][c] = (image[(top+rr)*width+(width-cc-2)][c])/65535.0f;//for dcraw implementation
						cfa[rr*TS+ccmax+cc] = rgb[rr*TS+ccmax+cc][c];
					}
			}
			
			//also, fill the image corners
			if (rrmin>0 && ccmin>0) {
				for (rr=0; rr<16; rr++) 
					for (cc=0; cc<16; cc++) {
						c=FC(rr,cc);
						rgb[(rr)*TS+cc][c] = (ri->data[32-rr][32-cc])/65535.0f;
						//rgb[(rr)*TS+cc][c] = (rgb[(32-rr)*TS+(32-cc)][c]);//for dcraw implementation
						cfa[(rr)*TS+cc] = rgb[(rr)*TS+cc][c];
					}
			}
			if (rrmax<rr1 && ccmax<cc1) {
				for (rr=0; rr<16; rr++) 
					for (cc=0; cc<16; cc++) {
						c=FC(rr,cc);
						rgb[(rrmax+rr)*TS+ccmax+cc][c] = (ri->data[(height-rr-2)][(width-cc-2)])/65535.0f;
						//rgb[(rrmax+rr)*TS+ccmax+cc][c] = (image[(height-rr-2)*width+(width-cc-2)][c])/65535.0f;//for dcraw implementation
						cfa[(rrmax+rr)*TS+ccmax+cc] = rgb[(rrmax+rr)*TS+ccmax+cc][c];
					}
			}
			if (rrmin>0 && ccmax<cc1) {
				for (rr=0; rr<16; rr++) 
					for (cc=0; cc<16; cc++) {
						c=FC(rr,cc);
						rgb[(rr)*TS+ccmax+cc][c] = (ri->data[(32-rr)][(width-cc-2)])/65535.0f;
						//rgb[(rr)*TS+ccmax+cc][c] = (image[(32-rr)*width+(width-cc-2)][c])/65535.0f;//for dcraw implementation
						cfa[(rr)*TS+ccmax+cc] = rgb[(rr)*TS+ccmax+cc][c];
					}
			}
			if (rrmax<rr1 && ccmin>0) {
				for (rr=0; rr<16; rr++) 
					for (cc=0; cc<16; cc++) {
						c=FC(rr,cc);
						rgb[(rrmax+rr)*TS+cc][c] = (ri->data[(height-rr-2)][(32-cc)])/65535.0f;
						//rgb[(rrmax+rr)*TS+cc][c] = (image[(height-rr-2)*width+(32-cc)][c])/65535.0f;//for dcraw implementation
						cfa[(rrmax+rr)*TS+cc] = rgb[(rrmax+rr)*TS+cc][c];
					}
			}
			
			//end of border fill
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			
			for (rr=1; rr < rr1-1; rr++)
				for (cc=1, indx=(rr)*TS+cc; cc < cc1-1; cc++, indx++) {
					
					delh[indx] = fabs(cfa[indx+1]-cfa[indx-1]);
					delv[indx] = fabs(cfa[indx+v1]-cfa[indx-v1]);
					delhsq[indx] = SQR(delh[indx]);
					delvsq[indx] = SQR(delv[indx]);
					delp[indx] = fabs(cfa[indx+p1]-cfa[indx-p1]);
					delm[indx] = fabs(cfa[indx+m1]-cfa[indx-m1]);
					
				}
			
			for (rr=2; rr < rr1-2; rr++)
				for (cc=2,indx=(rr)*TS+cc; cc < cc1-2; cc++, indx++) {
					
					dirwts[indx][0] = eps+delv[indx+v1]+delv[indx-v1]+delv[indx];//+fabs(cfa[indx+v2]-cfa[indx-v2]);
					//vert directional averaging weights
					dirwts[indx][1] = eps+delh[indx+1]+delh[indx-1]+delh[indx];//+fabs(cfa[indx+2]-cfa[indx-2]);
					//horizontal weights
					
					if (FC(rr,cc)&1) {
						//for later use in diagonal interpolation
						//Dgrbp1[indx]=2*cfa[indx]-(cfa[indx-p1]+cfa[indx+p1]);
						//Dgrbm1[indx]=2*cfa[indx]-(cfa[indx-m1]+cfa[indx+m1]);
						Dgrbpsq1[indx]=(SQR(cfa[indx]-cfa[indx-p1])+SQR(cfa[indx]-cfa[indx+p1]));
						Dgrbmsq1[indx]=(SQR(cfa[indx]-cfa[indx-m1])+SQR(cfa[indx]-cfa[indx+m1]));
					} 
				}
			
			//t2_init += clock()-t1_init;
			// end of tile initialization
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			
			//interpolate vertical and horizontal color differences
			//t1_vcdhcd = clock();
			
			for (rr=4; rr<rr1-4; rr++)
				//for (cc=4+(FC(rr,2)&1),indx=rr*TS+cc,c=FC(rr,cc); cc<cc1-4; cc+=2,indx+=2) {
				for (cc=4,indx=rr*TS+cc; cc<cc1-4; cc++,indx++) {
					c=FC(rr,cc);
					if (c&1) {sgn=-1;} else {sgn=1;}
					
					//initialization of nyquist test
					nyquist[indx]=0;
					//preparation for diag interp
					rbint[indx]=0;
					
					//color ratios in each cardinal direction
					cru = cfa[indx-v1]*(dirwts[indx-v2][0]+dirwts[indx][0])/(dirwts[indx-v2][0]*cfa[indx]+dirwts[indx][0]*cfa[indx-v2]);
					crd = cfa[indx+v1]*(dirwts[indx+v2][0]+dirwts[indx][0])/(dirwts[indx+v2][0]*cfa[indx]+dirwts[indx][0]*cfa[indx+v2]);
					crl = cfa[indx-1]*(dirwts[indx-2][1]+dirwts[indx][1])/(dirwts[indx-2][1]*cfa[indx]+dirwts[indx][1]*cfa[indx-2]);
					crr = cfa[indx+1]*(dirwts[indx+2][1]+dirwts[indx][1])/(dirwts[indx+2][1]*cfa[indx]+dirwts[indx][1]*cfa[indx+2]);
					
					guha=cfa[indx-v1]+0.5*(cfa[indx]-cfa[indx-v2]);
					gdha=cfa[indx+v1]+0.5*(cfa[indx]-cfa[indx+v2]);
					glha=cfa[indx-1]+0.5*(cfa[indx]-cfa[indx-2]);
					grha=cfa[indx+1]+0.5*(cfa[indx]-cfa[indx+2]);
					
					if (fabs(1-cru)<arthresh) {guar=cfa[indx]*cru;} else {guar=guha;}
					if (fabs(1-crd)<arthresh) {gdar=cfa[indx]*crd;} else {gdar=gdha;}
					if (fabs(1-crl)<arthresh) {glar=cfa[indx]*crl;} else {glar=glha;}
					if (fabs(1-crr)<arthresh) {grar=cfa[indx]*crr;} else {grar=grha;}
					
					hwt = dirwts[indx-1][1]/(dirwts[indx-1][1]+dirwts[indx+1][1]);
					vwt = dirwts[indx-v1][0]/(dirwts[indx+v1][0]+dirwts[indx-v1][0]);
					
					//interpolated G via adaptive weights of cardinal evaluations
					Gintvar = vwt*gdar+(1-vwt)*guar;
					Ginthar = hwt*grar+(1-hwt)*glar;
					Gintvha = vwt*gdha+(1-vwt)*guha;
					Ginthha = hwt*grha+(1-hwt)*glha;
					//interpolated color differences
					vcd[indx] = sgn*(Gintvar-cfa[indx]);
					hcd[indx] = sgn*(Ginthar-cfa[indx]);
					vcdalt[indx] = sgn*(Gintvha-cfa[indx]);
					hcdalt[indx] = sgn*(Ginthha-cfa[indx]);
					
					//differences of interpolations in opposite directions
					dgintv[indx]=MIN(SQR(guha-gdha),SQR(guar-gdar));
					dginth[indx]=MIN(SQR(glha-grha),SQR(glar-grar));
				}
			//t2_vcdhcd += clock() - t1_vcdhcd;
			
			//t1_cdvar = clock();
			for (rr=4; rr<rr1-4; rr++)
				//for (cc=4+(FC(rr,2)&1),indx=rr*TS+cc,c=FC(rr,cc); cc<cc1-4; cc+=2,indx+=2) {
				for (cc=4,indx=rr*TS+cc; cc<cc1-4; cc++,indx++) {
					c=FC(rr,cc);
					
					hcdvar = 3*(SQR(hcd[indx-2])+SQR(hcd[indx])+SQR(hcd[indx+2]))-SQR(hcd[indx-2]+hcd[indx]+hcd[indx+2]);
					hcdaltvar = 3*(SQR(hcdalt[indx-2])+SQR(hcdalt[indx])+SQR(hcdalt[indx+2]))-SQR(hcdalt[indx-2]+hcdalt[indx]+hcdalt[indx+2]);
					vcdvar = 3*(SQR(vcd[indx-v2])+SQR(vcd[indx])+SQR(vcd[indx+v2]))-SQR(vcd[indx-v2]+vcd[indx]+vcd[indx+v2]);
					vcdaltvar = 3*(SQR(vcdalt[indx-v2])+SQR(vcdalt[indx])+SQR(vcdalt[indx+v2]))-SQR(vcdalt[indx-v2]+vcdalt[indx]+vcdalt[indx+v2]);
					//choose the smallest variance; this yields a smoother interpolation
					if (hcdaltvar<hcdvar) hcd[indx]=hcdalt[indx];
					if (vcdaltvar<vcdvar) vcd[indx]=vcdalt[indx];
					
					//bound the interpolation in regions of high saturation
					if (c&1) {
						Ginth = -hcd[indx]+cfa[indx];//R or B
						Gintv = -vcd[indx]+cfa[indx];//B or R
						
						if (hcd[indx]>0) {
							if (3*hcd[indx] > (Ginth+cfa[indx])) {
								hcd[indx]=-ULIM(Ginth,cfa[indx-1],cfa[indx+1])+cfa[indx];
							} else {
								hwt = 1-3*hcd[indx]/(eps+Ginth+cfa[indx]);
								hcd[indx]=hwt*hcd[indx] + (1-hwt)*(-ULIM(Ginth,cfa[indx-1],cfa[indx+1])+cfa[indx]);
							}
						}
						if (vcd[indx]>0) {
							if (3*vcd[indx] > (Gintv+cfa[indx])) {
								vcd[indx]=-ULIM(Gintv,cfa[indx-v1],cfa[indx+v1])+cfa[indx];
							} else {
								vwt = 1-3*vcd[indx]/(eps+Gintv+cfa[indx]);
								vcd[indx]=vwt*vcd[indx] + (1-vwt)*(-ULIM(Gintv,cfa[indx-v1],cfa[indx+v1])+cfa[indx]);
							}
						}
						
						if (Ginth > 1) hcd[indx]=-ULIM(Ginth,cfa[indx-1],cfa[indx+1])+cfa[indx];//for RT implementation
						if (Gintv > 1) vcd[indx]=-ULIM(Gintv,cfa[indx-v1],cfa[indx+v1])+cfa[indx];
						//if (Ginth > pre_mul[c]) hcd[indx]=-ULIM(Ginth,cfa[indx-1],cfa[indx+1])+cfa[indx];//for dcraw implementation
						//if (Gintv > pre_mul[c]) vcd[indx]=-ULIM(Gintv,cfa[indx-v1],cfa[indx+v1])+cfa[indx];
						
					} else {
						
						Ginth = hcd[indx]+cfa[indx];//interpolated G
						Gintv = vcd[indx]+cfa[indx];
						
						if (hcd[indx]<0) {
							if (3*hcd[indx] < -(Ginth+cfa[indx])) {
								hcd[indx]=ULIM(Ginth,cfa[indx-1],cfa[indx+1])-cfa[indx];
							} else {
								hwt = 1+3*hcd[indx]/(eps+Ginth+cfa[indx]);
								hcd[indx]=hwt*hcd[indx] + (1-hwt)*(ULIM(Ginth,cfa[indx-1],cfa[indx+1])-cfa[indx]);
							}
						}
						if (vcd[indx]<0) {
							if (3*vcd[indx] < -(Gintv+cfa[indx])) {
								vcd[indx]=ULIM(Gintv,cfa[indx-v1],cfa[indx+v1])-cfa[indx];
							} else {
								vwt = 1+3*vcd[indx]/(eps+Gintv+cfa[indx]);
								vcd[indx]=vwt*vcd[indx] + (1-vwt)*(ULIM(Gintv,cfa[indx-v1],cfa[indx+v1])-cfa[indx]);
							}
						}
						
						if (Ginth > 1) hcd[indx]=ULIM(Ginth,cfa[indx-1],cfa[indx+1])-cfa[indx];//for RT implementation
						if (Gintv > 1) vcd[indx]=ULIM(Gintv,cfa[indx-v1],cfa[indx+v1])-cfa[indx];
						//if (Ginth > pre_mul[c]) hcd[indx]=ULIM(Ginth,cfa[indx-1],cfa[indx+1])-cfa[indx];//for dcraw implementation
						//if (Gintv > pre_mul[c]) vcd[indx]=ULIM(Gintv,cfa[indx-v1],cfa[indx+v1])-cfa[indx];
					}

					vcdsq[indx] = SQR(vcd[indx]);
					hcdsq[indx] = SQR(hcd[indx]);
					cddiffsq[indx] = SQR(vcd[indx]-hcd[indx]);
				}
			
			for (rr=6; rr<rr1-6; rr++)
				for (cc=6+(FC(rr,2)&1),indx=rr*TS+cc; cc<cc1-6; cc+=2,indx+=2) {
					
					//compute color difference variances in cardinal directions
					
					Dgrbvvaru = 4*(vcdsq[indx]+vcdsq[indx-v1]+vcdsq[indx-v2]+vcdsq[indx-v3])-SQR(vcd[indx]+vcd[indx-v1]+vcd[indx-v2]+vcd[indx-v3]);
					Dgrbvvard = 4*(vcdsq[indx]+vcdsq[indx+v1]+vcdsq[indx+v2]+vcdsq[indx+v3])-SQR(vcd[indx]+vcd[indx+v1]+vcd[indx+v2]+vcd[indx+v3]);
					Dgrbhvarl = 4*(hcdsq[indx]+hcdsq[indx-1]+hcdsq[indx-2]+hcdsq[indx-3])-SQR(hcd[indx]+hcd[indx-1]+hcd[indx-2]+hcd[indx-3]);
					Dgrbhvarr = 4*(hcdsq[indx]+hcdsq[indx+1]+hcdsq[indx+2]+hcdsq[indx+3])-SQR(hcd[indx]+hcd[indx+1]+hcd[indx+2]+hcd[indx+3]);
					
					hwt = dirwts[indx-1][1]/(dirwts[indx-1][1]+dirwts[indx+1][1]);
					vwt = dirwts[indx-v1][0]/(dirwts[indx+v1][0]+dirwts[indx-v1][0]);
					
					vcdvar = epssq+vwt*Dgrbvvard+(1-vwt)*Dgrbvvaru;
					hcdvar = epssq+hwt*Dgrbhvarr+(1-hwt)*Dgrbhvarl;
					
					//compute fluctuations in up/down and left/right interpolations of colors
					Dgrbvvaru = (dgintv[indx])+(dgintv[indx-v1])+(dgintv[indx-v2]);
					Dgrbvvard = (dgintv[indx])+(dgintv[indx+v1])+(dgintv[indx+v2]);
					Dgrbhvarl = (dginth[indx])+(dginth[indx-1])+(dginth[indx-2]);
					Dgrbhvarr = (dginth[indx])+(dginth[indx+1])+(dginth[indx+2]);
					
					vcdvar1 = epssq+vwt*Dgrbvvard+(1-vwt)*Dgrbvvaru;
					hcdvar1 = epssq+hwt*Dgrbhvarr+(1-hwt)*Dgrbhvarl;
					
					//determine adaptive weights for G interpolation
					varwt=hcdvar/(vcdvar+hcdvar);
					diffwt=hcdvar1/(vcdvar1+hcdvar1);
					
					//if both agree on interpolation direction, choose the one with strongest directional discrimination;
					//otherwise, choose the u/d and l/r difference fluctuation weights
					if ((0.5-varwt)*(0.5-diffwt)>0 && fabs(0.5-diffwt)<fabs(0.5-varwt)) {hvwt[indx]=varwt;} else {hvwt[indx]=diffwt;}
				}
			//t2_cdvar += clock() - t1_cdvar;
			
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			// Nyquist test				 
			//t1_nyqtest = clock();
			
			for (rr=6; rr<rr1-6; rr++)
				for (cc=6+(FC(rr,2)&1),indx=rr*TS+cc; cc<cc1-6; cc+=2,indx+=2) {
					
					//nyquist texture test: ask if difference of vcd compared to hcd is larger or smaller than RGGB gradients
					nyqtest = (gaussodd[0]*cddiffsq[indx]+ \
							   gaussodd[1]*(cddiffsq[indx-m1]+cddiffsq[indx+p1]+ \
											cddiffsq[indx-p1]+cddiffsq[indx+m1])+ \
							   gaussodd[2]*(cddiffsq[indx-v2]+cddiffsq[indx-2]+ \
											cddiffsq[indx+2]+cddiffsq[indx+v2])+ \
							   gaussodd[3]*(cddiffsq[indx-m2]+cddiffsq[indx+p2]+ \
											cddiffsq[indx-p2]+cddiffsq[indx+m2]));
					
					nyqtest -= nyqthresh*(gaussgrad[0]*(delhsq[indx]+delvsq[indx])+ \
										  gaussgrad[1]*(delhsq[indx-v1]+delvsq[indx-v1]+delhsq[indx+1]+delvsq[indx+1]+ \
														delhsq[indx-1]+delvsq[indx-1]+delhsq[indx+v1]+delvsq[indx+v1])+ \
										  gaussgrad[2]*(delhsq[indx-m1]+delvsq[indx-m1]+delhsq[indx+p1]+delvsq[indx+p1]+ \
														delhsq[indx-p1]+delvsq[indx-p1]+delhsq[indx+m1]+delvsq[indx+m1])+ \
										  gaussgrad[3]*(delhsq[indx-v2]+delvsq[indx-v2]+delhsq[indx-2]+delvsq[indx-2]+ \
														delhsq[indx+2]+delvsq[indx+2]+delhsq[indx+v2]+delvsq[indx+v2])+ \
										  gaussgrad[4]*(delhsq[indx-2*TS-1]+delvsq[indx-2*TS-1]+delhsq[indx-2*TS+1]+delvsq[indx-2*TS+1]+ \
														delhsq[indx-TS-2]+delvsq[indx-TS-2]+delhsq[indx-TS+2]+delvsq[indx-TS+2]+ \
														delhsq[indx+TS-2]+delvsq[indx+TS-2]+delhsq[indx+TS+2]+delvsq[indx-TS+2]+ \
														delhsq[indx+2*TS-1]+delvsq[indx+2*TS-1]+delhsq[indx+2*TS+1]+delvsq[indx+2*TS+1])+ \
										  gaussgrad[5]*(delhsq[indx-m2]+delvsq[indx-m2]+delhsq[indx+p2]+delvsq[indx+p2]+ \
														delhsq[indx-p2]+delvsq[indx-p2]+delhsq[indx+m2]+delvsq[indx+m2]));
					
					
					if (nyqtest>0) {nyquist[indx]=1;}//nyquist=1 for nyquist region
				}
			
			for (rr=8; rr<rr1-8; rr++)
				for (cc=8+(FC(rr,2)&1),indx=rr*TS+cc; cc<cc1-8; cc+=2,indx+=2) {
					
					areawt=(nyquist[indx-v2]+nyquist[indx-m1]+nyquist[indx+p1]+ \
							nyquist[indx-2]+nyquist[indx]+nyquist[indx+2]+ \
							nyquist[indx-p1]+nyquist[indx+m1]+nyquist[indx+v2]);
					//if most of your neighbors are named Nyquist, it's likely that you're one too
					if (areawt>4) nyquist[indx]=1;
					//or not
					if (areawt<4) nyquist[indx]=0;
				}
			
			//t2_nyqtest += clock() - t1_nyqtest;
			// end of Nyquist test
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			
						
			
			
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			// in areas of Nyquist texture, do area interpolation
			//t1_areainterp = clock();
			for (rr=8; rr<rr1-8; rr++)
				for (cc=8+(FC(rr,2)&1),indx=rr*TS+cc; cc<cc1-8; cc+=2,indx+=2) {
					
					if (nyquist[indx]) {
						// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
						// area interpolation
						
						sumh=sumv=sumsqh=sumsqv=areawt=0;
						for (i=-6; i<7; i+=2)
							for (j=-6; j<7; j+=2) {
								indx1=(rr+i)*TS+cc+j;
								if (nyquist[indx1]) {
									sumh += cfa[indx1]-0.5*(cfa[indx1-1]+cfa[indx1+1]);
									sumv += cfa[indx1]-0.5*(cfa[indx1-v1]+cfa[indx1+v1]);
									sumsqh += 0.5*(SQR(cfa[indx1]-cfa[indx1-1])+SQR(cfa[indx1]-cfa[indx1+1]));
									sumsqv += 0.5*(SQR(cfa[indx1]-cfa[indx1-v1])+SQR(cfa[indx1]-cfa[indx1+v1]));
									areawt +=1;
								}
							}
						
						//horizontal and vertical color differences, and adaptive weight
						hcdvar=epssq+MAX(0, areawt*sumsqh-sumh*sumh);
						vcdvar=epssq+MAX(0, areawt*sumsqv-sumv*sumv);
						hvwt[indx]=hcdvar/(vcdvar+hcdvar);
						
						// end of area interpolation
						// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
						
					}
				}
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			//t2_areainterp += clock() - t1_areainterp;
			
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			//populate G at R/B sites
			for (rr=8; rr<rr1-8; rr++)
				for (cc=8+(FC(rr,2)&1),indx=rr*TS+cc; cc<cc1-8; cc+=2,indx+=2) {
					
					//first ask if one gets more directional discrimination from nearby B/R sites
					hvwtalt = 0.25*(hvwt[indx-m1]+hvwt[indx+p1]+hvwt[indx-p1]+hvwt[indx+m1]);
					vo=fabs(0.5-hvwt[indx]);
					ve=fabs(0.5-hvwtalt);
					if (vo<ve) {hvwt[indx]=hvwtalt;}//a better result was obtained from the neighbors
					Dgrb[indx][0] = (hcd[indx]*(1-hvwt[indx]) + vcd[indx]*hvwt[indx]);//evaluate color differences
					rgb[indx][1] = cfa[indx] + Dgrb[indx][0];//evaluate G (finally!)
					
					//local curvature in G (preparation for nyquist refinement step)
					if (nyquist[indx]) {
						Dgrbh2[indx] = SQR(rgb[indx][1] - 0.5*(rgb[indx-1][1]+rgb[indx+1][1]));
						Dgrbv2[indx] = SQR(rgb[indx][1] - 0.5*(rgb[indx-v1][1]+rgb[indx+v1][1]));
					}
				}
			
			//end of standard interpolation
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			
			
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			// refine Nyquist areas using G curvatures
			
			for (rr=8; rr<rr1-8; rr++)
				for (cc=8+(FC(rr,2)&1),indx=rr*TS+cc; cc<cc1-8; cc+=2,indx+=2) {
					
					if (nyquist[indx]) {
						//local averages (over Nyquist pixels only) of G curvature squared 
						gvarh = epssq + (gquinc[0]*Dgrbh2[indx]+ \
									   gquinc[1]*(Dgrbh2[indx-m1]+Dgrbh2[indx+p1]+Dgrbh2[indx-p1]+Dgrbh2[indx+m1])+ \
									   gquinc[2]*(Dgrbh2[indx-v2]+Dgrbh2[indx-2]+Dgrbh2[indx+2]+Dgrbh2[indx+v2])+ \
									   gquinc[3]*(Dgrbh2[indx-m2]+Dgrbh2[indx+p2]+Dgrbh2[indx-p2]+Dgrbh2[indx+m2]));
						gvarv = epssq + (gquinc[0]*Dgrbv2[indx]+ \
									   gquinc[1]*(Dgrbv2[indx-m1]+Dgrbv2[indx+p1]+Dgrbv2[indx-p1]+Dgrbv2[indx+m1])+ \
									   gquinc[2]*(Dgrbv2[indx-v2]+Dgrbv2[indx-2]+Dgrbv2[indx+2]+Dgrbv2[indx+v2])+ \
									   gquinc[3]*(Dgrbv2[indx-m2]+Dgrbv2[indx+p2]+Dgrbv2[indx-p2]+Dgrbv2[indx+m2]));
						//use the results as weights for refined G interpolation
						Dgrb[indx][0] = (hcd[indx]*gvarv + vcd[indx]*gvarh)/(gvarv+gvarh);
						rgb[indx][1] = cfa[indx] + Dgrb[indx][0];
					}
				}
			
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
						
			//t1_diag = clock();
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			// diagonal interpolation correction
			/*for (rr=8; rr<rr1-8; rr++)
			 for (cc=8+(FC(rr,2)&1),indx=rr*TS+cc; cc<cc1-8; cc+=2,indx+=2) {
			 
			 
			 //evaluate diagonal gradients based on CFA values
			 //first, diagonal gradients between G1 and G2
			 gradp=0.25*((fabs(cfa[indx-2*TS+1]-cfa[indx-v1])+2*fabs(cfa[indx-v1]-cfa[indx-1])+fabs(cfa[indx-1]-cfa[indx+TS-2]))+ \
			 (fabs(cfa[indx-TS+2]-cfa[indx+1])+2*fabs(cfa[indx+1]-cfa[indx+v1])+fabs(cfa[indx+v1]-cfa[indx+2*TS-1])));
			 gradm=0.25*((fabs(cfa[indx-2*TS-1]-cfa[indx-v1])+2*fabs(cfa[indx-v1]-cfa[indx+1])+fabs(cfa[indx+1]-cfa[indx+TS+2]))+ \
			 (fabs(cfa[indx-TS-2]-cfa[indx-1])+2*fabs(cfa[indx-1]-cfa[indx+v1])+fabs(cfa[indx+v1]-cfa[indx+2*TS+1])));		
			 
			 //diagonal gradients within RGGB planes
			 gradp += eps + (gauss1[0]*delp[indx]+gauss1[1]*(delp[indx-v1]+delp[indx-1]+delp[indx+1]+delp[indx+v1])+ \
			 gauss1[2]*(delp[indx-m1]+delp[indx+p1]+delp[indx-p1]+delp[indx+m1]));
			 gradm += eps + (gauss1[0]*delm[indx]+gauss1[1]*(delm[indx-v1]+delm[indx-1]+delm[indx+1]+delm[indx+v1])+ \
			 gauss1[2]*(delm[indx-m1]+delm[indx+p1]+delm[indx-p1]+delm[indx+m1]));
			 
			 gradpm = fabs((gradp - gradm)/(gradp + gradm));
			 
			 //hor/vert gradients within RGGB planes
			 gradv = eps + (gauss1[0]*delv[indx]+gauss1[1]*(delv[indx-v1]+delv[indx-1]+delv[indx+1]+delv[indx+v1])+ \
			 gauss1[2]*(delv[indx-m1]+delv[indx+p1]+delv[indx-p1]+delv[indx+m1]));
			 gradh = eps + (gauss1[0]*delh[indx]+gauss1[1]*(delh[indx-v1]+delh[indx-1]+delh[indx+1]+delh[indx+v1])+ \
			 gauss1[2]*(delh[indx-m1]+delh[indx+p1]+delh[indx-p1]+delh[indx+m1]));
			 gradhv = fabs((gradv - gradh)/(gradv + gradh));
			 
			 
			 // %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			 
			 
			 if (gradpm-gradhv<pmthresh) continue;
			 pmwt[indx]=1;
			 }
			 
			 for (rr=8; rr<rr1-8; rr++)
			 for (cc=8+(FC(rr,2)&1),indx=rr*TS+cc; cc<cc1-8; cc+=2,indx+=2) {
			 
			 areawt=(pmwt[indx-v2]+pmwt[indx-m1]+pmwt[indx+p1]+ \
			 pmwt[indx-2]+pmwt[indx]+pmwt[indx+2]+ \
			 pmwt[indx-p1]+pmwt[indx+m1]+pmwt[indx+v2]);
			 //if most of your neighbors are named pmwt, it's likely that you're one too
			 if (areawt>3) pmwt[indx]=1;
			 //or not
			 if (areawt<2) pmwt[indx]=0;
			 }*/
			
			for (rr=8; rr<rr1-8; rr++)
				for (cc=8+(FC(rr,2)&1),indx=rr*TS+cc; cc<cc1-8; cc+=2,indx+=2) {
					
					
					rbvarp = epssq + (gausseven[0]*(Dgrbpsq1[indx-v1]+Dgrbpsq1[indx-1]+Dgrbpsq1[indx+1]+Dgrbpsq1[indx+v1]) + \
									gausseven[1]*(Dgrbpsq1[indx-v2-1]+Dgrbpsq1[indx-v2+1]+Dgrbpsq1[indx-2-v1]+Dgrbpsq1[indx+2-v1]+ \
												  Dgrbpsq1[indx-2+v1]+Dgrbpsq1[indx+2+v1]+Dgrbpsq1[indx+v2-1]+Dgrbpsq1[indx+v2+1]));
					//rbvarp -=  SQR( (gausseven[0]*(Dgrbp1[indx-v1]+Dgrbp1[indx-1]+Dgrbp1[indx+1]+Dgrbp1[indx+v1]) + \
					gausseven[1]*(Dgrbp1[indx-v2-1]+Dgrbp1[indx-v2+1]+Dgrbp1[indx-2-v1]+Dgrbp1[indx+2-v1]+ \
					Dgrbp1[indx-2+v1]+Dgrbp1[indx+2+v1]+Dgrbp1[indx+v2-1]+Dgrbp1[indx+v2+1])));
					rbvarm = epssq + (gausseven[0]*(Dgrbmsq1[indx-v1]+Dgrbmsq1[indx-1]+Dgrbmsq1[indx+1]+Dgrbmsq1[indx+v1]) + \
									gausseven[1]*(Dgrbmsq1[indx-v2-1]+Dgrbmsq1[indx-v2+1]+Dgrbmsq1[indx-2-v1]+Dgrbmsq1[indx+2-v1]+ \
												  Dgrbmsq1[indx-2+v1]+Dgrbmsq1[indx+2+v1]+Dgrbmsq1[indx+v2-1]+Dgrbmsq1[indx+v2+1]));
					//rbvarm -=  SQR( (gausseven[0]*(Dgrbm1[indx-v1]+Dgrbm1[indx-1]+Dgrbm1[indx+1]+Dgrbm1[indx+v1]) + \
					gausseven[1]*(Dgrbm1[indx-v2-1]+Dgrbm1[indx-v2+1]+Dgrbm1[indx-2-v1]+Dgrbm1[indx+2-v1]+ \
					Dgrbm1[indx-2+v1]+Dgrbm1[indx+2+v1]+Dgrbm1[indx+v2-1]+Dgrbm1[indx+v2+1])));
					
					
					
					// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
					
					//diagonal color ratios
					crse=2*(cfa[indx+m1])/(eps+cfa[indx]+(cfa[indx+m2]));
					crnw=2*(cfa[indx-m1])/(eps+cfa[indx]+(cfa[indx-m2]));
					crne=2*(cfa[indx+p1])/(eps+cfa[indx]+(cfa[indx+p2]));
					crsw=2*(cfa[indx-p1])/(eps+cfa[indx]+(cfa[indx-p2]));
					
					//assign B/R at R/B sites
					if (fabs(1-crse)<arthresh) {rbse=cfa[indx]*crse;}//use this if more precise diag interp is necessary
					else {rbse=(cfa[indx+m1])+0.5*(cfa[indx]-cfa[indx+m2]);}
					if (fabs(1-crnw)<arthresh) {rbnw=cfa[indx]*crnw;}
					else {rbnw=(cfa[indx-m1])+0.5*(cfa[indx]-cfa[indx-m2]);}
					if (fabs(1-crne)<arthresh) {rbne=cfa[indx]*crne;}
					else {rbne=(cfa[indx+p1])+0.5*(cfa[indx]-cfa[indx+p2]);}
					if (fabs(1-crsw)<arthresh) {rbsw=cfa[indx]*crsw;}
					else {rbsw=(cfa[indx-p1])+0.5*(cfa[indx]-cfa[indx-p2]);}
					
					/*rbse=(cfa[indx+TS+1])+0.5*(cfa[indx]-cfa[indx+2*TS+2]);
					 rbnw=(cfa[indx-TS-1])+0.5*(cfa[indx]-cfa[indx-2*TS-2]);
					 rbne=(cfa[indx-TS+1])+0.5*(cfa[indx]-cfa[indx-2*TS+2]);
					 rbsw=(cfa[indx+TS-1])+0.5*(cfa[indx]-cfa[indx+2*TS-2]);*/
					
					wtse= eps+delm[indx]+delm[indx+m1]+delm[indx+m2];//same as for wtu,wtd,wtl,wtr
					wtnw= eps+delm[indx]+delm[indx-m1]+delm[indx-m2];
					wtne= eps+delp[indx]+delp[indx+p1]+delp[indx+p2];
					wtsw= eps+delp[indx]+delp[indx-p1]+delp[indx-p2];
					
					
					rbm[indx] = (wtse*rbnw+wtnw*rbse)/(wtse+wtnw);
					rbp[indx] = (wtne*rbsw+wtsw*rbne)/(wtne+wtsw);
					
					pmwt[indx] = rbvarm/(rbvarp+rbvarm);
					
					// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
					//bound the interpolation in regions of high saturation
					if (rbp[indx]<cfa[indx]) {
						if (2*rbp[indx] < cfa[indx]) {
							rbp[indx] = ULIM(rbp[indx] ,cfa[indx-p1],cfa[indx+p1]);
						} else {
							pwt = 2*(cfa[indx]-rbp[indx])/(eps+rbp[indx]+cfa[indx]);
							rbp[indx]=pwt*rbp[indx] + (1-pwt)*ULIM(rbp[indx],cfa[indx-p1],cfa[indx+p1]);
						}
					}
					if (rbm[indx]<cfa[indx]) {
						if (2*rbm[indx] < cfa[indx]) {
							rbm[indx] = ULIM(rbm[indx] ,cfa[indx-m1],cfa[indx+m1]);
						} else {
							mwt = 2*(cfa[indx]-rbm[indx])/(eps+rbm[indx]+cfa[indx]);
							rbm[indx]=mwt*rbm[indx] + (1-mwt)*ULIM(rbm[indx],cfa[indx-m1],cfa[indx+m1]);
						}
					}
					
					if (rbp[indx] > 1) rbp[indx]=ULIM(rbp[indx],cfa[indx-p1],cfa[indx+p1]);//for RT implementation
					if (rbm[indx] > 1) rbm[indx]=ULIM(rbm[indx],cfa[indx-m1],cfa[indx+m1]);
					//c=FC(rr,cc);//for dcraw implementation
					//if (rbp[indx] > pre_mul[c]) rbp[indx]=ULIM(rbp[indx],cfa[indx-p1],cfa[indx+p1]);
					//if (rbm[indx] > pre_mul[c]) rbm[indx]=ULIM(rbm[indx],cfa[indx-m1],cfa[indx+m1]);
					// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

					//rbint[indx] = 0.5*(cfa[indx] + (rbp*rbvarm+rbm*rbvarp)/(rbvarp+rbvarm));//this is R+B, interpolated
				}	
			
			
			
			for (rr=10; rr<rr1-10; rr++)
				for (cc=10+(FC(rr,2)&1),indx=rr*TS+cc; cc<cc1-10; cc+=2,indx+=2) {
					
					//first ask if one gets more directional discrimination from nearby B/R sites
					pmwtalt = 0.25*(pmwt[indx-m1]+pmwt[indx+p1]+pmwt[indx-p1]+pmwt[indx+m1]);
					vo=fabs(0.5-pmwt[indx]);
					ve=fabs(0.5-pmwtalt);
					if (vo<ve) {pmwt[indx]=pmwtalt;}//a better result was obtained from the neighbors
					rbint[indx] = 0.5*(cfa[indx] + rbm[indx]*(1-pmwt[indx]) + rbp[indx]*pmwt[indx]);//this is R+B, interpolated
				}
			
			for (rr=12; rr<rr1-12; rr++)
				for (cc=12+(FC(rr,2)&1),indx=rr*TS+cc; cc<cc1-12; cc+=2,indx+=2) {	
					
					//if (fabs(0.5-pmwt[indx])<fabs(0.5-hvwt[indx])/*+0.5*pmthresh*/) continue;
					
					//now interpolate G vertically/horizontally using R+B values
					//unfortunately, since G interpolation cannot be done diagonally this may lead to color shifts
					//color ratios for G interpolation
					
					cru = cfa[indx-v1]*2/(eps+rbint[indx]+rbint[indx-v2]);
					crd = cfa[indx+v1]*2/(eps+rbint[indx]+rbint[indx+v2]);
					crl = cfa[indx-1]*2/(eps+rbint[indx]+rbint[indx-2]);
					crr = cfa[indx+1]*2/(eps+rbint[indx]+rbint[indx+2]);
					
					//interpolated G via adaptive ratios or Hamilton-Adams in each cardinal direction
					if (fabs(1-cru)<arthresh) {gu=rbint[indx]*cru;} 
					else {gu=cfa[indx-v1]+0.5*(rbint[indx]-rbint[indx-v2]);}
					if (fabs(1-crd)<arthresh) {gd=rbint[indx]*crd;} 
					else {gd=cfa[indx+v1]+0.5*(rbint[indx]-rbint[indx+v2]);}
					if (fabs(1-crl)<arthresh) {gl=rbint[indx]*crl;} 
					else {gl=cfa[indx-1]+0.5*(rbint[indx]-rbint[indx-2]);}
					if (fabs(1-crr)<arthresh) {gr=rbint[indx]*crr;} 
					else {gr=cfa[indx+1]+0.5*(rbint[indx]-rbint[indx+2]);}
					
					//gu=rbint[indx]*cru;
					//gd=rbint[indx]*crd;
					//gl=rbint[indx]*crl;
					//gr=rbint[indx]*crr;
					
					//interpolated G via adaptive weights of cardinal evaluations
					Gintv = (dirwts[indx-v1][0]*gd+dirwts[indx+v1][0]*gu)/(dirwts[indx+v1][0]+dirwts[indx-v1][0]);
					Ginth = (dirwts[indx-1][1]*gr+dirwts[indx+1][1]*gl)/(dirwts[indx-1][1]+dirwts[indx+1][1]);
					
					// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
					//bound the interpolation in regions of high saturation
					if (Gintv<rbint[indx]) {
						if (2*Gintv < rbint[indx]) {
							Gintv = ULIM(Gintv ,cfa[indx-v1],cfa[indx+v1]);
						} else {
							vwt = 2*(rbint[indx]-Gintv)/(eps+Gintv+rbint[indx]);
							Gintv=vwt*Gintv + (1-vwt)*ULIM(Gintv,cfa[indx-v1],cfa[indx+v1]);
						}
					}
					if (Ginth<rbint[indx]) {
						if (2*Ginth < rbint[indx]) {
							Ginth = ULIM(Ginth ,cfa[indx-1],cfa[indx+1]);
						} else {
							hwt = 2*(rbint[indx]-Ginth)/(eps+Ginth+rbint[indx]);
							Ginth=hwt*Ginth + (1-hwt)*ULIM(Ginth,cfa[indx-1],cfa[indx+1]);
						}
					}
					
					if (Ginth > 1) Ginth=ULIM(Ginth,cfa[indx-1],cfa[indx+1]);//for RT implementation
					if (Gintv > 1) Gintv=ULIM(Gintv,cfa[indx-v1],cfa[indx+v1]);
					//c=FC(rr,cc);//for dcraw implementation
					//if (Ginth > pre_mul[c]) Ginth=ULIM(Ginth,cfa[indx-1],cfa[indx+1]);
					//if (Gintv > pre_mul[c]) Gintv=ULIM(Gintv,cfa[indx-v1],cfa[indx+v1]);
					// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

					rgb[indx][1] = Ginth*(1-hvwt[indx]) + Gintv*hvwt[indx];
					Dgrb[indx][0] = rgb[indx][1]-cfa[indx];
					
					rgb[indx][2-FC(rr,cc)]=2*rbint[indx]-cfa[indx];
				}
			//end of diagonal interpolation correction
			//t2_diag += clock() - t1_diag;
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			
			//t1_chroma = clock();
			//fancy chrominance interpolation
			//(ey,ex) is location of R site
			for (rr=13-ey; rr<rr1-12; rr+=2)
				for (cc=13-ex,indx=rr*TS+cc; cc<cc1-12; cc+=2,indx+=2) {//B coset
					Dgrb[indx][1]=Dgrb[indx][0];//split out G-B from G-R
					Dgrb[indx][0]=0;
				}
			for (rr=12; rr<rr1-12; rr++)
				for (cc=12+(FC(rr,2)&1),indx=rr*TS+cc,c=1-FC(rr,cc)/2; cc<cc1-12; cc+=2,indx+=2) {
					wtnw=1.0/(eps+fabs(Dgrb[indx-m1][c]-Dgrb[indx+m1][c])+fabs(Dgrb[indx-m1][c]-Dgrb[indx-m3][c])+fabs(Dgrb[indx+m1][c]-Dgrb[indx-m3][c]));
					wtne=1.0/(eps+fabs(Dgrb[indx+p1][c]-Dgrb[indx-p1][c])+fabs(Dgrb[indx+p1][c]-Dgrb[indx+p3][c])+fabs(Dgrb[indx-p1][c]-Dgrb[indx+p3][c]));
					wtsw=1.0/(eps+fabs(Dgrb[indx-p1][c]-Dgrb[indx+p1][c])+fabs(Dgrb[indx-p1][c]-Dgrb[indx+m3][c])+fabs(Dgrb[indx+p1][c]-Dgrb[indx-p3][c]));
					wtse=1.0/(eps+fabs(Dgrb[indx+m1][c]-Dgrb[indx-m1][c])+fabs(Dgrb[indx+m1][c]-Dgrb[indx-p3][c])+fabs(Dgrb[indx-m1][c]-Dgrb[indx+m3][c]));
					
					Dgrb[indx][c]=(wtnw*Dgrb[indx-m1][c]+wtne*Dgrb[indx+p1][c]+wtsw*Dgrb[indx-p1][c]+wtse*Dgrb[indx+m1][c])/(wtnw+wtne+wtsw+wtse);
				}
			for (rr=12; rr<rr1-12; rr++)
				for (cc=12+(FC(rr,1)&1),indx=rr*TS+cc,c=FC(rr,cc+1)/2; cc<cc1-12; cc+=2,indx+=2)
					for(c=0;c<2;c++){
						
						Dgrb[indx][c]=((hvwt[indx-v1])*Dgrb[indx-v1][c]+(1-hvwt[indx+1])*Dgrb[indx+1][c]+(1-hvwt[indx-1])*Dgrb[indx-1][c]+(hvwt[indx+v1])*Dgrb[indx+v1][c])/ \
						((hvwt[indx-v1])+(1-hvwt[indx+1])+(1-hvwt[indx-1])+(hvwt[indx+v1]));
						
					}
			for(rr=12; rr<rr1-12; rr++)
				for(cc=12,indx=rr*TS+cc; cc<cc1-12; cc++,indx++){
					rgb[indx][0]=(rgb[indx][1]-Dgrb[indx][0]);
					rgb[indx][2]=(rgb[indx][1]-Dgrb[indx][1]);
				}
			//t2_chroma += clock() - t1_chroma;
			
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
			
			// copy smoothed results back to image matrix
			for (rr=16; rr < rr1-16; rr++)
				for (row=rr+top, cc=16; cc < cc1-16; cc++) {
					col = cc + left;
					
					indx=rr*TS+cc;
					
					red[row][col] = CLIP((int)(65535.0f*rgb[indx][0] + 0.5f));
					green[row][col] = CLIP((int)(65535.0f*rgb[indx][1] + 0.5f));
					blue[row][col] = CLIP((int)(65535.0f*rgb[indx][2] + 0.5f));
					
					//for dcraw implementation
					//for (c=0; c<3; c++){
					//	image[indx][c] = CLIP((int)(65535.0f*rgb[rr*TS+cc][c] + 0.5f)); 
					//} 
					
					
				}
			//end of main loop
			
			// clean up
			//free(buffer);
			
			if(plistener) plistener->setProgress(fabs((float)top/height));
		}	
	
	// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	
	
	
	// clean up
	free(buffer);
	
	// done

#undef TS
	
}