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Fix for smoother zoomed out preview images. Instead of point sampling every 'skip' number of pixels, pixels are binned in 'skip*skip' size blocks.

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Emil Martinec
2010-12-12 07:47:41 -06:00
parent 717e9db958
commit 98a4daf9af
2 changed files with 38 additions and 12 deletions
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20
rtengine/stdimagesource.cc
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@@ -182,12 +182,22 @@ void StdImageSource::getImage_ (ColorTemp ctemp, int tran, Image16* image, Previ
unsigned short* grn = new unsigned short[imwidth];
unsigned short* blue = new unsigned short[imwidth];
float rtot,gtot,btot;
int boxarea=SQR(pp.skip);
for (int i=istart; i<iend; i+=skip, ix++) {
for (int j=0,jx=sx1; j<imwidth; j++,jx+=pp.skip) {
red[j] = img->r[i][jx];
grn[j] = img->g[i][jx];
blue[j] = img->b[i][jx];
}
for (int j=0,jx=sx1; j<imwidth; j++,jx+=pp.skip) {
rtot=gtot=btot=0;
for (int m=0; m<pp.skip; m++)
for (int n=0; n<pp.skip; n++) {
rtot += img->r[i+m][jx+n];
gtot += img->g[i+m][jx+n];
btot += img->b[i+m][jx+n];
}
red[j] = round(rtot/boxarea);
grn[j] = round(gtot/boxarea);
blue[j] = round(btot/boxarea);
}
// if (hrp.enabled)
// hlRecovery (red, grn, blue, i, sx1, sx2, pp.skip);