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Blur issues with pixels

[1 Reply]
- 22-Feb-2013 09:48 AM
- Forum: Programming Questions
Hello all.

I'm pretty new to Processing and programming in general and taking a class on Processing.

Professor is asking that we apply a motion blur on an image.

I tried using the filter(BLUR); function but turned out that it couldn't do a motion blur effect.

Looked up on the Processing topic site and used the code there and came up with this.

The problem is that the coder used a greyscale picture and I need it in color and then apply motion blur.

And then save that image to use in another assignment.
1. PImage bBall;
3. float v = 1.0/9.0;
5. float[][] kernel = {{v, v, v},
6. {v, v, v},
7. {v, v, v}};
10. void setup()
11. {
12. size(534*2, 346);
13. bBall = loadImage("BasketballBorder.png");
14. noLoop();
15. }
17. void draw()
18. {
19. image(bBall, 0, 0);
20. bBall.loadPixels();
22. PImage edgeBBall = createImage(bBall.width, bBall.height, RGB);
24. for (int y = 1; y < bBall.height-1; y++)
25. {
26. for (int x = 1; x < bBall.width-1; x++)
27. {
28. float sum = 0;
29. for (int ky = -1; ky <= 1; ky++)
30. {
31. for (int kx = -1; kx <= 1; kx++)
32. {
33. int pos = (y + ky)*bBall.width + (x + kx);
35. //Having trouble here for the color values since it's using only the red(), it's making everything grey
36. float val = red(bBall.pixels[pos]);
37. sum += kernel[ky+1][kx+1] * val;
38. }
39. }
40. edgeBBall.pixels[y*bBall.width + x] = color(sum);
41. }
42. edgeBBall.updatePixels();
43. }
45. image(edgeBBall, width/2, 0); // Draw the new image
46. }
Also how do I create a motion blur?
I was thinking either changing the values in the kernel and have them weighted differently which didn't work.

Or do I change something within the for loops and to have them change multiple pixels at once in a certain direction.

Or is there a common way that I'm not aware of?

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