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Color Processing
Mathematica provides convenient functions and algorithms for manipulating colors in images, with full generality for arbitrary numbers of color channels.
Reference
ImageAdjust — adjust levels, brightness, contrast, gamma, etc.
ColorNegate — negate color values
ImageDemosaic — reconstruct a color image from raw images
Level & Histogram Processing
ImageHistogram — histogram of levels by channel
ImageLevels — tally of levels in each channel
DominantColors — find a list of dominant colors
HistogramTransform, HistogramTransformInterpolation — equalize levels
Color Spaces
ColorConvert — convert between color spaces
ColorSpace — option for specifying color spaces
ImageColorSpace — gives the color space setting for an image
, 
, 
, 
, 
, 
, 
— named color spaces
ColorProfileData — representation for general color spaces
Channel Operations
ColorSeparate, ColorCombine — separate, combine color channels
ImageChannels — the number of channels in an image
AlphaChannel — the alpha channel of the image
SetAlphaChannel ▪ RemoveAlphaChannel
Pixel Operations
ImageValuePositions, PixelValuePositions — coordinates of pixels of a given color
ImageValue, PixelValue — get the value of a pixel at the specified position
ReplaceImageValue, ReplacePixelValue — replace the value of specified pixels
ColorReplace — change pixel values based on color replacement rules
ImageApply — apply an arbitrary function to each pixel value
ImageScan — scan over every pixel of an image, applying a function
Pseudocolor Images »
Colorize — create pseudocolor images
ReliefImage — create an image from data using simulated relief
HighlightImage — highlight the region of interest in an image
Colors »
RGBColor ▪ GrayLevel ▪ Hue ▪ Red ▪ Blend ▪ ColorSlider ▪ ...
