Lines Matching refs:Black
33 // This file contains routines for resampling and LUT optimization, black point detection
34 // and black preservation.
36 // Black point detection -------------------------------------------------------------------------
61 // Use darker colorants to obtain black point. This works in the relative colorimetric intent and
69 cmsUInt16Number *Black;
79 // If the profile does not support input direction, assume Black point 0
89 // Try to get black by using black colorant
93 if (!_cmsEndPointsBySpace(Space, NULL, &Black, &nChannels)) {
118 // Something went wrong. Get rid of open resources and return zero as black
123 // Convert black to Lab
124 cmsDoTransform(xform, Black, &Lab, 1);
144 // Get a black point of output CMYK profile, discounting any ink-limiting embedded
186 // profiles on black point tag, that we must somehow fix chromaticity to
187 // avoid huge tint when doing Black point compensation. This function does
188 // just that. There is a special flag for using black point tag, but turned
212 // v4 + perceptual & saturation intents does have its own black point, and it is
213 // well specified enough to use it. Black point tag is deprecated in V4.
221 // Get Perceptual black out of v4 profiles. That is fixed for perceptual & saturation intents
239 // If black point is specified, then use it,
247 // Black point is absolute XYZ, so adapt to D50 to get PCS value
366 // Calculates the black point of a destination profile.
367 // This algorithm comes from the Adobe paper disclosing its black point compensation method.
400 // v4 + perceptual & saturation intents does have its own black point, and it is
401 // well specified enough to use it. Black point tag is deprecated in V4.
409 // Get Perceptual black out of v4 profiles. That is fixed for perceptual & saturation intents
436 // calculate initial Lab as source black point
446 // set the initial Lab to zero, that should be the black point for perceptual and saturation
515 // curve fitting: The round-trip curve normally looks like a nearly constant section at the black point,
523 // find the black point using the least squares error quadratic curve fitting
