Java BufferedImage Operation inColormap(float[][] in, float min, float max, float[][] colormap, BufferedImage b)

Description

in Colormap

License

Open Source License

Declaration

public static float inColormap(float[][] in, float min, float max, float[][] colormap, BufferedImage b) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.awt.image.BufferedImage;
import java.awt.image.DataBufferFloat;

public class Main {
    public static float inColormap(float[][] in, float min, float max, float[][] colormap, BufferedImage b) {
        int width = in[0].length;
        int height = in.length;
        int cvals = colormap.length;
        float[] bData = ((DataBufferFloat) b.getRaster().getDataBuffer()).getData();

        for (int yy = 0; yy < height; yy++) {
            for (int xx = 0; xx < width; xx++) {
                int cmapIdx = (int) (cvals * (in[yy][xx] - min) / max);
                bData[yy * width + xx] = colormap[cmapIdx][0];
                bData[yy * width + xx + 1] = colormap[cmapIdx][1];
                bData[yy * width + xx + 2] = colormap[cmapIdx][2];
            }//w ww .ja  va 2  s . co  m
        }
        return max;
    }
}

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