function blur (img, passes) {
	// Blur as described in article http://web.archive.org/web/20060718054020/http://www.acm.uiuc.edu/siggraph/workshops/wjarosz_convolution_2001.pdf
	// Increase passes for blurrier image
	var i, j, k, n, w = img.width, h = img.height, im = img.data,
		rounds = passes || 0,
		pos = step = jump = inner = outer = arr = 0;

	for(n=0;n<rounds;n++) {
		for(var m=0;m<2;m++) { // First blur rows, then columns
			if (m) {
				// Values for column blurring
				outer = w; inner = h;
				step = w*4;
			} else {
				// Row blurring
				outer = h; inner = w;
				step = 4;
			}
			for (i=0; i < outer; i++) {
				jump = m === 0 ? i*w*4 : 4*i;
				for (k=0;k<3;k++) { // Calculate for every color: red, green and blue
					pos = jump+k;
					arr = 0;
					// First pixel in line
					arr = im[pos]+im[pos+step]+im[pos+step*2];
					im[pos] = Math.floor(arr/3);
					// Second
					arr += im[pos+step*3];
					im[pos+step] = Math.floor(arr/4);
					// Third and last. Kernel complete and other pixels in line can work from there.
					arr += im[pos+step*4];
					im[pos+step*2] = Math.floor(arr/5);
					for (j = 3; j < inner-2; j++) {
						arr = Math.max(0, arr - im[pos+(j-2)*step] + im[pos+(j+2)*step]);
						im[pos+j*step] = Math.floor(arr/5);
					}
					// j is now inner - 2 (1 bigger)
					// End of line needs special handling like start of it
					arr -= im[pos+(j-2)*step];
					im[pos+j*step] = Math.floor(arr/4);
					arr -= im[pos+(j-1)*step];
					im[pos+(j+1)*step] = Math.floor(arr/3);
				}
			}
		}
	}
	return img;
}

function bluur(img, passes) {
	// Same as blur, but fakes borders for nicer code
	// Increase passes for blurrier image
	var i, j, k, m, n, w = img.width, h = img.height, im = img.data,
		rounds = passes || 0,
		pos = step = jump = inner = outer = arr = 0;

	for(n=0;n<rounds;n++) {
		for(m=0;m<2;m++) { // First blur rows, then columns
			if (m) {
				// Values for column blurring
				outer = w; inner = h;
				step = w*4;
			} else {
				// Row blurring
				outer = h; inner = w;
				step = 4;
			}
			for (i=0; i < outer; i++) {
				jump = m === 0 ? i*w*4 : 4*i;
				for (k=0;k<3;k++) { // Calculate for every color: red, green and blue
					pos = jump+k;
					for(j=arr=0;j<5;j++) { arr += im[pos+step*j]; }
					img[pos] = im[pos+step] = im[pos+step*2] = Math.floor(arr/5); // Slightly wrong, but nicer to read
					for (j = 3; j < inner-2; j++) {
						arr = Math.max(0, arr - im[pos+(j-2)*step] + im[pos+(j+2)*step]);
						im[pos+j*step] = Math.floor(arr/5);
					}
					// j is now inner - 2 (1 bigger)
					im[pos+j*step] = im[pos+(j+1)*step] = Math.floor(arr/5); // Slightly wrong, but nicer to read
				}
			}
		}
	}
	return img;
}