Java Utililty Methods Image Blur

final int width = image.getWidth();
final int height = image.getHeight();
BufferedImage result = new BufferedImage(width, height, image.getType());
int[] in = new int[width * height];
int[] out = new int[width * height];
image.getRGB(0, 0, width, height, in, 0, width);
convolve(kernel, in, out, width, height);
convolve(kernel, out, in, height, width);
...

Blurs the source pixels into the destination pixels.

float a;
float r;
float g;
float b;
int ca;
int cr;
int cg;
int cb;
...

float middle = blurValue;
float value = (1.f - middle) / 8f;
float[] BLUR = new float[] { value, value, value, value, middle, value, value, value, value };
ConvolveOp vBlurOp = new ConvolveOp(new Kernel(3, 3, BLUR));
return vBlurOp.filter(image, null);

Kernel kernel = new Kernel(3, 3,
        new float[] { 1f / 9f, 1f / 9f, 1f / 9f, 1f / 9f, 1f / 9f, 1f / 9f, 1f / 9f, 1f / 9f, 1f / 9f });
ConvolveOp cop = new ConvolveOp(kernel);
return cop.filter(img, dest);

Blurs the source pixels into the destination pixels.

final int windowSize = radius * 2 + 1;
final int radiusPlusOne = radius + 1;
int sumRed;
int sumGreen;
int sumBlue;
int sumAlpha;
int srcIndex = 0;
int dstIndex;
...

if (radius == 0) {
    return source;
final int r = (int) Math.ceil(radius);
final int rows = r * 2 + 1;
final float[] kernelData = new float[rows * rows];
final double sigma = radius / 3;
final double sigma22 = 2 * sigma * sigma;
...