WuQuant | Image Quantization Library (image-q)

Hierarchy

WuQuant

Index

Constructors

constructor

Properties

Methods

Constructors

constructor

new WuQuant(colorDistanceCalculator: IDistanceCalculator, colors?: number, significantBitsPerChannel?: number): WuQuant

- Defined in palette/wu/wuQuant.ts:112
Parameters
- colorDistanceCalculator: IDistanceCalculator
- Default value colors: number = 256
- Default value significantBitsPerChannel: number = 5
Returns WuQuant

Properties

Private _alphaMaxSideIndex

_alphaMaxSideIndex: number

Private _alphaSideSize

_alphaSideSize: number

Private _alphas

_alphas: number[]

Private _blues

_blues: number[]

Private _colors

_colors: number

Private _cubes

_cubes: WuColorCube[]

Private _distance

_distance: IDistanceCalculator

Private _greens

_greens: number[]

Private _maxSideIndex

_maxSideIndex: number

Private _moments

_moments: number[]

Private _momentsAlpha

_momentsAlpha: number[]

Private _momentsBlue

_momentsBlue: number[]

Private _momentsGreen

_momentsGreen: number[]

Private _momentsRed

_momentsRed: number[]

Private _pixels

_pixels: Point[]

Private _reds

_reds: number[]

Private _sideSize

_sideSize: number

Private _significantBitsPerChannel

_significantBitsPerChannel: number

Private _sums

_sums: number[]

Private _table

_table: number[]

Private _weights

_weights: number[]

Static Private alpha

alpha: number

Static Private blue

blue: number

Static Private green

green: number

Static Private red

red: number

Methods

Private _addColor

_addColor(color: Point): void

- Defined in palette/wu/wuQuant.ts:255
Parameters
- color: Point
Returns void

Private _calculateMoments

_calculateMoments(): void

- Defined in palette/wu/wuQuant.ts:275
Converts the histogram to a series of _moments.

Returns void

Private _calculateVariance

_calculateVariance(cube: WuColorCube): number

- Defined in palette/wu/wuQuant.ts:485
Calculates statistical variance for a given cube.

Parameters
- cube: WuColorCube
Returns number

Private _cut

_cut(first: WuColorCube, second: WuColorCube): boolean

- Defined in palette/wu/wuQuant.ts:546
Parameters
- first: WuColorCube
- second: WuColorCube
Returns boolean

Private _initialize

_initialize(colors: number): void

- Defined in palette/wu/wuQuant.ts:619
Parameters
- colors: number
Returns void

Private _maximize

_maximize(cube: WuColorCube, direction: number, first: number, last: number, wholeRed: number, wholeGreen: number, wholeBlue: number, wholeAlpha: number, wholeWeight: number): object

- Defined in palette/wu/wuQuant.ts:501
Finds the optimal (maximal) position for the cut.

Parameters
- cube: WuColorCube
- direction: number
- first: number
- last: number
- wholeRed: number
- wholeGreen: number
- wholeBlue: number
- wholeAlpha: number
- wholeWeight: number
Returns object
- max: number
- position: number

Private _preparePalette

_preparePalette(): void

- Defined in palette/wu/wuQuant.ts:153
Returns void

Private _setQuality

_setQuality(significantBitsPerChannel?: number): void

- Defined in palette/wu/wuQuant.ts:657
Parameters
- Default value significantBitsPerChannel: number = 5
Returns void

quantize

quantize(): Palette

- Defined in palette/wu/wuQuant.ts:130
Returns Palette

sample

sample(image: PointContainer): void

- Defined in palette/wu/wuQuant.ts:120
Parameters
- image: PointContainer
Returns void

Static Private _bottom

_bottom(cube: WuColorCube, direction: number, moment: number[]): number

- Defined in palette/wu/wuQuant.ts:435
Splits the cube in a given color direction at its minimum.

Parameters
- cube: WuColorCube
- direction: number
- moment: number[]
Returns number

Static Private _top

_top(cube: WuColorCube, direction: number, position: number, moment: number[]): number

- Defined in palette/wu/wuQuant.ts:381
Splits the cube in given position][and color direction.

Parameters
- cube: WuColorCube
- direction: number
- position: number
- moment: number[]
Returns number

Static Private _volume

_volume(cube: WuColorCube, moment: number[]): number

- Defined in palette/wu/wuQuant.ts:374
Computes the volume of the cube in a specific moment.

Parameters
- cube: WuColorCube
- moment: number[]
Returns number

Static Private _volumeFloat

_volumeFloat(cube: WuColorCube, moment: number[]): number

- Defined in palette/wu/wuQuant.ts:351
Computes the volume of the cube in a specific moment.

Parameters
- cube: WuColorCube
- moment: number[]
Returns number

Hierarchy

Index

Constructors

Properties

Methods

Constructors

constructor

Parameters

colorDistanceCalculator: IDistanceCalculator

Default value colors: number = 256

Default value significantBitsPerChannel: number = 5

Returns WuQuant

Properties

Private _alphaMaxSideIndex

Private _alphaSideSize

Private _alphas

Private _blues

Private _colors

Private _cubes

Private _distance

Private _greens

Private _maxSideIndex

Private _moments

Private _momentsAlpha

Private _momentsBlue

Private _momentsGreen

Private _momentsRed

Private _pixels

Private _reds

Private _sideSize

Private _significantBitsPerChannel

Private _sums

Private _table

Private _weights

Static Private alpha

Static Private blue

Static Private green

Static Private red

Methods

Private _addColor

Parameters

color: Point

Returns void

Private _calculateMoments

Returns void

Private _calculateVariance

Parameters

cube: WuColorCube

Returns number

Private _cut

Parameters

first: WuColorCube

second: WuColorCube

Returns boolean

Private _initialize

Parameters

colors: number

Returns void

Private _maximize

Parameters

cube: WuColorCube

direction: number

first: number

last: number

wholeRed: number

wholeGreen: number

wholeBlue: number

wholeAlpha: number

wholeWeight: number

Returns object

max: number

position: number

Private _preparePalette

Returns void

Private _setQuality

Parameters

Default value significantBitsPerChannel: number = 5

Returns void

quantize

Returns Palette