public static Bitmap colorMatrixBmp(Bitmap bmp, float[] matrixSrc) {
int width = bmp.getWidth();
int height = bmp.getHeight();
ColorMatrix matrix = new ColorMatrix();
matrix.set(matrixSrc);
ColorMatrixColorFilter filter = new ColorMatrixColorFilter(matrix);
Paint p = new Paint();
p.setColorFilter(filter);
Bitmap colorBmp = Bitmap.createBitmap(width, height, bmp.getConfig());
Canvas c = new Canvas(colorBmp);
c.drawBitmap(bmp, 0, 0, p);
return colorBmp;
}
public static Bitmap blackWhiteBmp(Bitmap bmp) {
// black and white
int width = bmp.getWidth();
int height = bmp.getHeight();
ColorMatrix matrix = new ColorMatrix();
float[] src = {
0.308F, 0.609F, 0.082F, 0, 0, 0.308F, 0.609F, 0.082F, 0, 0, 0.308F, 0.609F, 0.082F, 0, 0, 0,
0, 0, 1, 0
};
matrix.set(src);
ColorMatrixColorFilter filter = new ColorMatrixColorFilter(matrix);
Paint p = new Paint();
p.setColorFilter(filter);
Bitmap colorBmp = Bitmap.createBitmap(width, height, bmp.getConfig());
Canvas c = new Canvas(colorBmp);
c.drawBitmap(bmp, 0, 0, p);
return colorBmp;
}