Documentation
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Index ¶
- func DCT1D(input []float64) []float64
- func DCT2D(input [][]float64, w int, h int) [][]float64
- func DCT2DFast256(input *[]float64) (flattens [256]float64)
- func DCT2DFast64(input *[]float64) (flattens [64]float64)
- func FlattenPixels(pixels [][]float64, x int, y int) []float64
- func FlattenPixelsFast64(pixels []float64, x int, y int) []float64
- func Rgb2Gray(colorImg image.Image) [][]float64
- func Rgb2GrayFast(colorImg image.Image, pixels *[]float64)
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func DCT1D ¶
DCT1D function returns result of DCT-II. DCT type II, unscaled. Algorithm by Byeong Gi Lee, 1984.
func DCT2DFast256 ¶
DCT2DFast256 function returns a result of DCT2D by using the seperable property. DCT type II, unscaled. Algorithm by Byeong Gi Lee, 1984. Fast uses static DCT tables for improved performance. Returns flattened pixels.
func DCT2DFast64 ¶
DCT2DFast64 function returns a result of DCT2D by using the seperable property. Fast uses static DCT tables for improved performance. Returns flattened pixels.
func FlattenPixels ¶
FlattenPixels function flattens 2d array into 1d array.
func FlattenPixelsFast64 ¶
FlattenPixelsFast64 function flattens 2d array into 1d array.
func Rgb2GrayFast ¶
Rgb2GrayFast function converts RGB to a gray scale array.
Types ¶
This section is empty.
Source Files
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