private void gradientenBetrag(int[] srcPixels, int[] dstPixels, int width, int height, double gradientenBetrag) {
        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                int pos = y * width + x;




                counter = 0;
                for (int yK = -1; yK <= 1; yK++) {
                    for (int xK = -1; xK <= 1; xK++) {
                        if (yK + y < 0 || yK + y > height - 1 || xK + x < 0 || xK + x > width - 1) {
                            sobelXTemp[counter] = srcPixels[pos] & 0xff;
                            counter++;
                        } else {
                            kernelPos = (y + yK) * width + x + xK;
                            sobelXTemp[counter] = srcPixels[kernelPos] & 0xff;
                            counter++;
                        }
                    }
                }
                // sobel X
                // ergebnis= ((b-a)+(d-c)+(f-e))/6
                int resultX = getSobelGradient(sobelXTemp[2], sobelXTemp[0], sobelXTemp[5], sobelXTemp[3],
                        sobelXTemp[8], sobelXTemp[6], 0);
                int resultY = getSobelGradient(sobelYTemp[6], sobelYTemp[0], sobelYTemp[7], sobelYTemp[1],
                        sobelYTemp[8], sobelYTemp[2], 0);




                int result = Math.abs(resultX)+ Math.abs(resultY);
                //≈
                //int result = (int) Math.sqrt((resultX*resultX)+(resultY*resultY));

                dstPixels[pos] = (0xFF << 24) | (result << 16) | (result << 8) | result;
            }
        }
    }