Get Bitmap size Trimmable Bottom by color - Android Graphics

Android examples for Graphics:Bitmap Color

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Description

Get Bitmap size Trimmable Bottom by color

Demo Code


//package com.java2s;
import android.graphics.Bitmap;
import android.graphics.Color;

public class Main {
    private static final double FUZZ = 0.1;

    public static final float sizeTrimmableBottom(Bitmap b) {
        for (int y = 1; y < b.getHeight(); y++) {
            for (int x = 0; x < b.getWidth() - 1; x++)
                if (colorDistance(b.getPixel(x, b.getHeight() - y),
                        b.getPixel(x + 1, b.getHeight() - y)) > FUZZ)
                    return (float) (y - 1) / b.getHeight();
            if (colorDistance(b.getPixel(0, b.getHeight() - y),
                    b.getPixel(0, b.getHeight() - y - 1)) > FUZZ)
                return (float) (y - 1) / b.getHeight();
        }/*from  ww w  .ja  v  a2 s .  co m*/
        return 0;
    }

    private static final double colorDistance(int color1, int color2) {
        int redDistance = Color.red(color1) - Color.red(color2);
        int greenDistance = Color.green(color1) - Color.green(color2);
        int blueDistance = Color.blue(color1) - Color.blue(color2);
        double distance = Math.sqrt(redDistance * redDistance
                + greenDistance * greenDistance + blueDistance
                * blueDistance);
        return distance / 256.;
    }
}

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