Android图像处理之冰冻效果

原图效果图

代码：

package com.color;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.ImageView;
public class ColorView extends ImageView {
private Paint myPaint = null;
private Bitmap bitmap = null;
private int width, height;
private int[] oldPixels;
private int[] newPixels;
private int color, color2;
private int pixelsR, pixelsG, pixelsB, pixelsA, pixelsR2, pixelsG2,
pixelsB2;
public ColorView(Context context, AttributeSet attrs) {
super(context, attrs);
bitmap = BitmapFactory.decodeResource(context.getResources(),
R.drawable.ww);
width = bitmap.getWidth();
height = bitmap.getHeight();
oldPixels = new int[width * height];
newPixels = new int[width * height];
invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// 获取像素
bitmap.getPixels(oldPixels, 0, width, 0, 0, width, height);
for (int i = 1; i < height * width; i++) {
color = oldPixels[i];
// 获取RGB分量
pixelsA = Color.alpha(color);
pixelsR = Color.red(color);
pixelsG = Color.green(color);
pixelsB = Color.blue(color);
//R
int pixel = pixelsR - pixelsG - pixelsB;
pixel = pixel * 3 / 2;
if (pixel < 0) {
pixel = -pixel;
}
if (pixel > 255){
pixel = 255;
}
pixelsR = pixel; // 计算后重置R值，以下类同
//G
pixel = pixelsG - pixelsR - pixelsB;
pixel = pixel * 3 / 2;
if (pixel < 0) {
pixel = -pixel;
}
if (pixel > 255){
pixel = 255;
}
pixelsG = pixel;
//B
pixel = pixelsB - pixelsR - pixelsG;
pixel = pixel * 3 / 2;
if (pixel < 0) {
pixel = -pixel;
}
if (pixel > 255){
pixel = 255;
}
pixelsB = pixel;
// 根据新的RGB生成新像素
newPixels[i] = Color.argb(pixelsA, pixelsR, pixelsG, pixelsB);
}
// 根据新像素生成新图片
bitmap.setPixels(newPixels, 0, width, 0, 0, width, height);
canvas.drawBitmap(bitmap, 0, 0, myPaint);
}
}

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巴特西

Android图像处理之冰冻效果

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