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Java - showBitPlanes

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  1. public BufferedImage showBitPlanes(BufferedImage bi, int lv)
  2. 	{
  3. 		int level = 0;
  4.  
  5. 		switch(level)
  6. 		{
  7. 			case 0:
  8. 				level = 128;
  9. 				break;
  10. 			case 1:
  11. 				level = 64;
  12. 				break;
  13. 			case 2:
  14. 				level = 32;
  15. 				break;
  16. 			case 3:
  17. 				level = 16;
  18. 				break;
  19. 			case 4:
  20. 				level = 8;
  21. 				break;
  22. 			case 5:
  23. 				level = 4;
  24. 				break;
  25. 			case 6:
  26. 				level = 2;
  27. 				break;
  28. 			case 7:
  29. 				level = 1;
  30. 				break;
  31. 			default:
  32. 					return null;
  33. 		}
  34.  
  35. 		int width = bi.getWidth();
  36. 		int height = bi.getHeight();
  37.  
  38. 		BufferedImage img = new BufferedImage(width, height, bi.getType());
  39.  
  40. 		for(int x=0; x<width; x++)
  41. 			for(int y=0; y<height; y++)
  42. 				img.setRGB(x, y, ((bi.getRGB(x, y) & level)/level)*255);
  43.  
  44. 		return img;
  45. 	}

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