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Bugfixes for CA_correct_RT.cc

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This commit is contained in:
Emil Martinec
2010-06-18 11:51:25 -05:00
parent c5ade72243
commit 3fccf6b5d8
1 changed files with 33 additions and 22 deletions
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55
rtengine/CA_correct_RT.cc
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@@ -126,7 +126,7 @@ void RawImageSource::CA_correct_RT() {
int res;
static const int v1=TS, v2=2*TS, v3=3*TS, v4=4*TS;//, p1=-TS+1, p2=-2*TS+2, p3=-3*TS+3, m1=TS+1, m2=2*TS+2, m3=3*TS+3;
float eps=1e-10; //tolerance to avoid dividing by zero
float eps=1e-5; //tolerance to avoid dividing by zero
float wtu, wtd, wtl, wtr;
float coeff[2][3][3], CAshift[2][3];
@@ -154,13 +154,15 @@ void RawImageSource::CA_correct_RT() {
float (*rbhpfv); // TS*TS*4
float (*rblpfh); // TS*TS*4
float (*rblpfv); // TS*TS*4
float (*grblpfh); // TS*TS*4
float (*grblpfv); // TS*TS*4
/* assign working space; this would not be necessary
if the algorithm is part of the larger pre-interpolation processing */
buffer = (char *) malloc(36*TS*TS);
buffer = (char *) malloc(44*TS*TS);
//merror(buffer,"CA_correct()");
memset(buffer,0,36*TS*TS);
memset(buffer,0,44*TS*TS);
// rgb array
rgb = (float (*)[3]) buffer;
@@ -170,6 +172,9 @@ void RawImageSource::CA_correct_RT() {
rbhpfv = (float (*)) (buffer + 24*TS*TS);
rblpfh = (float (*)) (buffer + 28*TS*TS);
rblpfv = (float (*)) (buffer + 32*TS*TS);
grblpfh = (float (*)) (buffer + 36*TS*TS);
grblpfv = (float (*)) (buffer + 40*TS*TS);
if((height+border2)%(TS-border2)==0) vz1=1; else vz1=0;
if((width+border2)%(TS-border2)==0) hz1=1; else hz1=0;
@@ -314,26 +319,29 @@ void RawImageSource::CA_correct_RT() {
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) {
/*ghpfv = 2*rgb[indx][1]-rgb[indx+v2][1]-rgb[indx-v2][1];
ghpfh = 2*rgb[indx][1]-rgb[indx+2][1]-rgb[indx-2][1];
rbhpfv[indx] = ghpfv-(2*rgb[indx][c]-rgb[indx+v2][c]-rgb[indx-v2][c]);
rbhpfh[indx] = ghpfh-(2*rgb[indx][c]-rgb[indx+2][c]-rgb[indx-2][c]);*/
rbhpfv[indx] = fabs(fabs((rgb[indx][1]-rgb[indx][c])-(rgb[indx+v4][1]-rgb[indx+v4][c])) + \
fabs((rgb[indx-v4][1]-rgb[indx-v4][c])-(rgb[indx][1]-rgb[indx][c])) - \
fabs((rgb[indx-v4][1]-rgb[indx-v4][c])-(rgb[indx+v4][1]-rgb[indx+v4][c])));
rbhpfh[indx] = fabs(fabs((rgb[indx][1]-rgb[indx][c])-(rgb[indx+4][1]-rgb[indx+4][c])) + \
fabs((rgb[indx-4][1]-rgb[indx-4][c])-(rgb[indx][1]-rgb[indx][c])) - \
fabs((rgb[indx-4][1]-rgb[indx-4][c])-(rgb[indx+4][1]-rgb[indx+4][c])));
//ghpfv = fabs(fabs(rgb[indx][1]-rgb[indx+v4][1])+fabs(rgb[indx][1]-rgb[indx-v4][1]) - \
fabs(rgb[indx+v4][1]-rgb[indx-v4][1]));
//ghpfh = fabs(fabs(rgb[indx][1]-rgb[indx+4][1])+fabs(rgb[indx][1]-rgb[indx-4][1]) - \
fabs(rgb[indx+4][1]-rgb[indx-4][1]));
rbhpfv[indx] = fabs(fabs(rgb[indx][1]-rgb[indx][1]-(rgb[indx+v4][c]+rgb[indx+v4][c]))+ \
fabs(rgb[indx][1]-rgb[indx-v4][1]-(rgb[indx][c]-rgb[indx-v4][c])) - \
fabs(rgb[indx+v4][1]-rgb[indx-v4][1]-(rgb[indx+v4][c]-rgb[indx-v4][c])));
rbhpfh[indx] = fabs(fabs(rgb[indx][1]-rgb[indx+4][1]-(rgb[indx][c]-rgb[indx+4][c]))+ \
fabs(rgb[indx][1]-rgb[indx-4][1]-(rgb[indx][c]-rgb[indx-4][c])) - \
fabs(rgb[indx+4][1]-rgb[indx-4][1]-(rgb[indx+4][c]-rgb[indx-4][c])));
/*ghpfv = fabs(fabs(rgb[indx][1]-rgb[indx+v4][1])+fabs(rgb[indx][1]-rgb[indx-v4][1]) - \
fabs(rgb[indx+v4][1]-rgb[indx-v4][1]));
ghpfh = fabs(fabs(rgb[indx][1]-rgb[indx+4][1])+fabs(rgb[indx][1]-rgb[indx-4][1]) - \
fabs(rgb[indx+4][1]-rgb[indx-4][1]));
rbhpfv[indx] = fabs(ghpfv - fabs(fabs(rgb[indx][c]-rgb[indx+v4][c])+fabs(rgb[indx][c]-rgb[indx-v4][c]) - \
fabs(rgb[indx+v4][c]-rgb[indx-v4][c])));
rbhpfh[indx] = fabs(ghpfh - fabs(fabs(rgb[indx][c]-rgb[indx+4][c])+fabs(rgb[indx][c]-rgb[indx-4][c]) - \
fabs(rgb[indx+4][c]-rgb[indx-4][c])));*/
glpfv = 0.25*(2*rgb[indx][1]+rgb[indx+v2][1]+rgb[indx-v2][1]);
glpfh = 0.25*(2*rgb[indx][1]+rgb[indx+2][1]+rgb[indx-2][1]);
rblpfv[indx] = eps+fabs(glpfv - 0.25*(2*rgb[indx][c]+rgb[indx+v2][c]+rgb[indx-v2][c]));
rblpfh[indx] = eps+fabs(glpfh - 0.25*(2*rgb[indx][c]+rgb[indx+2][c]+rgb[indx-2][c]));
grblpfv[indx] = glpfv + 0.25*(2*rgb[indx][c]+rgb[indx+v2][c]+rgb[indx-v2][c]);
grblpfh[indx] = glpfh + 0.25*(2*rgb[indx][c]+rgb[indx+2][c]+rgb[indx-2][c]);
}
// along line segments, find the point along each segment that minimizes the color variance
@@ -350,26 +358,25 @@ void RawImageSource::CA_correct_RT() {
gdiff=0.3125*(rgb[indx+TS][1]-rgb[indx-TS][1])+0.09375*(rgb[indx+TS+1][1]-rgb[indx-TS+1][1]+rgb[indx+TS-1][1]-rgb[indx-TS-1][1]);
deltgrb=(rgb[indx][c]-rgb[indx][1]);
gradwt=fabs(0.25*rbhpfv[indx]+0.125*(rbhpfv[indx+2]+rbhpfv[indx-2]) )/(eps+MAX(rblpfv[indx-v2],rblpfv[indx+v2]));
gradwt=fabs(0.25*rbhpfv[indx]+0.125*(rbhpfv[indx+2]+rbhpfv[indx-2]) )*(grblpfv[indx-v2]+grblpfv[indx+v2])/(eps+0.1*grblpfv[indx-v2]+rblpfv[indx-v2]+0.1*grblpfv[indx+v2]+rblpfv[indx+v2]);
coeff[0][0][c] += gradwt*deltgrb*deltgrb;
coeff[0][1][c] += gradwt*gdiff*deltgrb;
coeff[0][2][c] += gradwt*gdiff*gdiff;
areawt[0][c]+=1;
//}
//horizontal
gdiff=0.3125*(rgb[indx+1][1]-rgb[indx-1][1])+0.09375*(rgb[indx+1+TS][1]-rgb[indx-1+TS][1]+rgb[indx+1-TS][1]-rgb[indx-1-TS][1]);
deltgrb=(rgb[indx][c]-rgb[indx][1]);
gradwt=fabs(0.25*rbhpfh[indx]+0.125*(rbhpfh[indx+v2]+rbhpfh[indx-v2]) )/(eps+MAX(rblpfh[indx-2],rblpfh[indx+2]));
gradwt=fabs(0.25*rbhpfh[indx]+0.125*(rbhpfh[indx+v2]+rbhpfh[indx-v2]) )*(grblpfh[indx-2]+grblpfh[indx+2])/(eps+0.1*grblpfh[indx-2]+rblpfh[indx-2]+0.1*grblpfh[indx+2]+rblpfh[indx+2]);
coeff[1][0][c] += gradwt*deltgrb*deltgrb;
coeff[1][1][c] += gradwt*gdiff*deltgrb;
coeff[1][2][c] += gradwt*gdiff*gdiff;
areawt[1][c]+=1;
//}
// In Mathematica,
// f[x_]=Expand[Total[Flatten[
@@ -422,6 +429,9 @@ void RawImageSource::CA_correct_RT() {
blockshifts[(vblock)*hblsz+hblock][c][1]=(CAshift[1][c]); //hor CA shift for R/B
//data structure: blockshifts[blocknum][R/B][v/h]
}
if(plistener) plistener->setProgress(0.5*fabs((float)top/height));
}
//end of diagnostic pass
@@ -737,7 +747,8 @@ void RawImageSource::CA_correct_RT() {
}
if(plistener) plistener->setProgress(fabs((float)top/height));
if(plistener) plistener->setProgress(0.5+0.5*fabs((float)top/height));
}
// clean up