Pix Pix::GenerateMaskByBand(int lower, int upper, int inband, bool useCMap)
{
if(IsEmpty())
return Pix();
PIX *dPix = pixGenerateMaskByBand(pix, lower, upper, inband, useCMap ? 1 : 0);
if(!dPix)
return Pix();
return Pix(&dPix);
} // END Pix::GenerateMaskByBand()
static PIX *
FakeReconstructByBand(L_REGPARAMS *rp,
const char *fname)
{
l_int32 i, jlow, jup, n, nbands;
l_int32 rval1, gval1, bval1, rval2, gval2, bval2, rval, gval, bval;
PIX *pixs, *pixm, *pixd;
PIXCMAP *cmaps, *cmapd;
pixs = pixRead(fname);
cmaps = pixGetColormap(pixs);
n = pixcmapGetCount(cmaps);
nbands = (n + 1) / 2;
pixd = pixCreateTemplate(pixs);
cmapd = pixcmapCreate(pixGetDepth(pixs));
pixSetColormap(pixd, cmapd);
for (i = 0; i < nbands; i++) {
jlow = 2 * i;
jup = L_MIN(jlow + 1, n - 1);
pixm = pixGenerateMaskByBand(pixs, jlow, jup, 1, 1);
/* Get average color in the band */
pixcmapGetColor(cmaps, jlow, &rval1, &gval1, &bval1);
pixcmapGetColor(cmaps, jup, &rval2, &gval2, &bval2);
rval = (rval1 + rval2) / 2;
gval = (gval1 + gval2) / 2;
bval = (bval1 + bval2) / 2;
pixcmapAddColor(cmapd, rval, gval, bval);
pixSetMaskedCmap(pixd, pixm, 0, 0, rval, gval, bval);
pixDestroy(&pixm);
}
pixDestroy(&pixs);
return pixd;
}
