版画效果函数

public static Bitmap changeToBlock(Bitmap bitmap) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();

int dst[] = new int[width * height];
bitmap.getPixels(dst, 0, width, 0, 0, width, height);

int iPixel = 0;
int i, j, color, pos;
for (j = 0; j < height; j++) {
for (i = 0; i < width; i++) {
pos = j * width + i;
color = dst[pos];
int avg = (Color.red(color) + Color.green(color) + Color.blue(color)) / 3;
if (avg >= 100)
iPixel = 255;
else
iPixel = 0;

dst[pos] = Color.rgb(iPixel, iPixel, iPixel);
}
}

Bitmap bmpReturn = Bitmap.createBitmap(width, height,
Bitmap.Config.RGB_565);
bmpReturn.setPixels(dst, 0, width, 0, 0, width, height);
return bmpReturn;
}