UML diagram

Functions

• repair_image

  • Colors white pixels to the closest non-white neighbour colour with the lowest coordinates (most left, most upper)
  • Repairs red-black stripes.
  • Creates a bitmap same size as the original image where grey pixels become zeros everything else become ones.

• skeletonize_image

  • Skeletonizes the bitmap (created during the repair) and using the bitmap applies the skeleton to the image.
  • Every zeros become grey pixels in the image.

• compare_pixels

  • Compares two colors if they are similar with a given tolerance

Abstract types

• Color: (red: [0..255], green: [0..255], blue: [0..255], opacity: [0..255]) - record type
• Image: Matrix of colors indexed by Y,X coordinates
• Bitmap: Matrix of zeros and ones indexed by Y,X coordinates