The Wolfram Language provides convenient functions and algorithms for manipulating colors and color images, with full generality for arbitrary numbers of color channels.

Basic Operations

ColorNegate — negate color values

Blend — blend color values

ImageDemosaic — reconstruct a color image from raw images

Color Adjustments

ImageAdjust — uniformly adjust levels, brightness, contrast, gamma, etc.

BrightnessEqualize — correct uneven brightness

Lighter  ▪  Darker  ▪  ColorBalance  ▪  ColorToneMapping

Level & Histogram Processing

ImageHistogram — histogram of levels by channel

ImageLevels — tally of levels in each channel

Binarize  ▪  FindThreshold  ▪  Threshold

HistogramTransform  ▪  HistogramTransformInterpolation

Color Segmentation

DominantColors — find a list of dominant colors

ImageRecolor — recolor regions of an image with a new color

ColorDetect  ▪  FindMatchingColor  ▪  ColorQuantize  ▪  ColorReplace

Color Spaces

ColorConvert — convert between color spaces

ColorSpace — option for specifying color spaces

ImageColorSpace — gives the color space setting for an image

"Grayscale", "RGB", "CMYK", "HSB", "XYZ", "LAB", "LCH", "LUV" — named color spaces

ColorProfileData — representation for general color spaces

Color Visualization

ChromaticityPlot — visualize gamut of a color space or an image

ChromaticityPlot3D  ▪  ImageWaveformPlot  ▪  ImageVectorscopePlot

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

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 — specify a color by its red, green, and blue values

LABColor  ▪  GrayLevel  ▪  Red  ▪  Green  ▪  RandomColor  ▪  ...

ColorQ  ▪  ColorDistance  ▪  ColorSetter  ▪  ...