histogram

Documentation

Index

• func DrawHistogramGray(img *image.Gray, size image.Point) *image.Gray
• func DrawHistogramRGBA(img *image.RGBA, size image.Point) *image.RGBA
• func HistogramGray(img *image.Gray) [hsize]uint64
• func HistogramRGBA(img *image.RGBA) [channels][hsize]uint64
• func HistogramRGBABlue(img *image.RGBA) [hsize]uint64
• func HistogramRGBAGreen(img *image.RGBA) [hsize]uint64
• func HistogramRGBARed(img *image.RGBA) [hsize]uint64

Functions

func DrawHistogramGray

func DrawHistogramGray(img *image.Gray, size image.Point) *image.Gray

DrawHistogramGray computes and draws the histogram of a grayscale image. The size of the image is 256*scale width and 256*scale height.

func DrawHistogramRGBA

func DrawHistogramRGBA(img *image.RGBA, size image.Point) *image.RGBA

DrawHistogramRGBA computes and draws the histogram of a RGBA image. The size of the image is 256*scale width and 256*scale height.

func HistogramGray

func HistogramGray(img *image.Gray) [hsize]uint64

HistogramGray computes the histogram for a grayscale image. Returns an array of 256 uint64 values containing distribution of the pixel values.

func HistogramRGBA

func HistogramRGBA(img *image.RGBA) [channels][hsize]uint64

HistogramRGBA computes the histogram for a RGBA image. Returns an 2D (shape: [3][256]) array of uint64 values containing distribution of color values from each RGBA channel.

func HistogramRGBABlue

func HistogramRGBABlue(img *image.RGBA) [hsize]uint64

HistogramRGBABlue computes the histogram for blue channel from an RGBA image. Returns an array of 256 uint64 values containing distribution of the pixel values.

func HistogramRGBAGreen

func HistogramRGBAGreen(img *image.RGBA) [hsize]uint64

HistogramRGBAGreen computes the histogram for green channel from an RGBA image. Returns an array of 256 uint64 values containing distribution of the pixel values.

func HistogramRGBARed

func HistogramRGBARed(img *image.RGBA) [hsize]uint64

HistogramRGBARed computes the histogram for red channel from an RGBA image. Returns an array of 256 uint64 values containing distribution of the pixel values.