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Bugfix for CA red/blue slider reading from keyFile. Improvements to CA autocorrect performance.

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This commit is contained in:
Emil Martinec
2010-12-11 08:50:06 -06:00
parent 74e9b64fc7
commit c65a22cc26
2 changed files with 15 additions and 30 deletions
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41
rtengine/CA_correct_RT.cc
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@@ -153,9 +153,9 @@ void RawImageSource::CA_correct_RT(double cared, double cablue) {
//temporary parameters for tile CA evaluation
float gdiff, deltgrb;
//interpolated G at edge of plaquette
float Ginthfloor, Ginthceil, Gint, RBint, gradwt;
float Ginthfloor, Ginthceil, Gint, gradwt;
//interpolated color difference at edge of plaquette
float grbdiffinthfloor, grbdiffinthceil, grbdiffint, grbdiffold;
float grbdiffint, grbdiffold;
//data for evaluation of block CA shift variance
float blockave[2][3]={{0,0,0},{0,0,0}}, blocksqave[2][3]={{0,0,0},{0,0,0}}, blockdenom[2][3]={{0,0,0},{0,0,0}}, blockvar[2][3];
//low and high pass 1D filters of G in vertical/horizontal directions
@@ -790,36 +790,21 @@ void RawImageSource::CA_correct_RT(double cared, double cablue) {
grbdiffold = rgb[indx][1]-rgb[indx][c];
//interpolate color difference from optical R/B locations to grid locations
grbdiffinthfloor=(1-shifthfrac[c]/2)*grbdiff[indx]+(shifthfrac[c]/2)*grbdiff[indx-2*GRBdir[1][c]];
grbdiffinthceil=(1-shifthfrac[c]/2)*grbdiff[(rr-2*GRBdir[0][c])*TS+cc]+(shifthfrac[c]/2)*grbdiff[(rr-2*GRBdir[0][c])*TS+cc-2*GRBdir[1][c]];
//grbdiffint is bilinear interpolation of G-R/G-B at grid point
grbdiffint=(1-shiftvfrac[c]/2)*grbdiffinthfloor+(shiftvfrac[c]/2)*grbdiffinthceil;
//gradient weights using difference from G at CA shift points and G at grid points
p[0]=1/(eps+fabs(rgb[indx][1]-gshift[indx]));
p[1]=1/(eps+fabs(rgb[indx][1]-gshift[indx-2*GRBdir[1][c]]));
p[2]=1/(eps+fabs(rgb[indx][1]-gshift[(rr-2*GRBdir[0][c])*TS+cc]));
p[3]=1/(eps+fabs(rgb[indx][1]-gshift[(rr-2*GRBdir[0][c])*TS+cc-2*GRBdir[1][c]]));
grbdiffint = (p[0]*grbdiff[indx]+p[1]*grbdiff[indx-2*GRBdir[1][c]]+ \
p[2]*grbdiff[(rr-2*GRBdir[0][c])*TS+cc]+p[3]*grbdiff[(rr-2*GRBdir[0][c])*TS+cc-2*GRBdir[1][c]])/(p[0]+p[1]+p[2]+p[3]);
//now determine R/B at grid points using interpolated color differences and interpolated G value at grid point
RBint=rgb[indx][1]-grbdiffint;
if (fabs(RBint-rgb[indx][c])<0.25*(RBint+rgb[indx][c])) {
if (fabs(grbdiffold)>fabs(grbdiffint) ) {
rgb[indx][c]=RBint;
}
} else {
//gradient weights using difference from G at CA shift points and G at grid points
p[0]=1/(eps+fabs(rgb[indx][1]-gshift[indx]));
p[1]=1/(eps+fabs(rgb[indx][1]-gshift[indx-2*GRBdir[1][c]]));
p[2]=1/(eps+fabs(rgb[indx][1]-gshift[(rr-2*GRBdir[0][c])*TS+cc]));
p[3]=1/(eps+fabs(rgb[indx][1]-gshift[(rr-2*GRBdir[0][c])*TS+cc-2*GRBdir[1][c]]));
grbdiffint = (p[0]*grbdiff[indx]+p[1]*grbdiff[indx-2*GRBdir[1][c]]+ \
p[2]*grbdiff[(rr-2*GRBdir[0][c])*TS+cc]+p[3]*grbdiff[(rr-2*GRBdir[0][c])*TS+cc-2*GRBdir[1][c]])/(p[0]+p[1]+p[2]+p[3]);
//now determine R/B at grid points using interpolated color differences and interpolated G value at grid point
if (fabs(grbdiffold)>fabs(grbdiffint) ) {
rgb[indx][c]=rgb[indx][1]-grbdiffint;
}
if (fabs(grbdiffold)>fabs(grbdiffint) ) {
rgb[indx][c]=rgb[indx][1]-grbdiffint;
}
//if color difference interpolation overshot the correction, just desaturate
if (grbdiffold*grbdiffint<0) {
rgb[indx][c]=rgb[indx][1]-0.5*(grbdiffold+grbdiffint);