程序包 org.meteoinfo.image.filter

接口 Quantizer

所有已知实现类:

OctTreeQuantizer

public interface Quantizer

The interface for an image quantizer. The addColor method is called (repeatedly if necessary) with all the image pixels. A color table can then be returned by calling the buildColorTable method.

方法概要

修饰符和类型	方法	说明
void	addPixels(int[] pixels, int offset, int count)	Add pixels to the quantizer.
int[]	buildColorTable()	Build a color table from the added pixels.
int	getIndexForColor(int rgb)	Using the previously-built color table, return the index into that table for a pixel.
void	setup(int numColors)	Initialize the quantizer.

方法详细资料

setup

void setup(int numColors)

Initialize the quantizer. This should be called before adding any pixels.

参数:

numColors - the number of colors we're quantizing to.

addPixels

void addPixels(int[] pixels,
               int offset,
               int count)

Add pixels to the quantizer.

参数:

pixels - the array of ARGB pixels

offset - the offset into the array

count - the count of pixels

buildColorTable

int[] buildColorTable()

Build a color table from the added pixels.

返回:

an array of ARGB pixels representing a color table

getIndexForColor

int getIndexForColor(int rgb)

Using the previously-built color table, return the index into that table for a pixel. This is guaranteed to return a valid index - returning the index of a color closer to that requested if necessary.

参数:

rgb - the pixel to find

返回:

the pixel's index in the color table