AI Spring 2009

1. Course webpage
2. IMAGE PROCESSING UNIT - Assignments Feb 20 (OPEN WITH OPENOFFICE - ABIWORD distorts the format)
   1. Sobels Edge detection - demonstrate with various thresholds.
   2. Floodfill assignments:
      • floodfillTester.pgm and the floodfillTesterSolution.pgm sample solution image. ***BLACKBOARD ASSIGNMENT "FLOODFILL 1"
      • Now try your solution program on floodfillTester2.pgm and floodfillTester3.pgm
        Here's the assignment (.doc) (open with openoffice, or the formatting may be off)
   3. Image inverter function: pixels with values 255 (white) are converted to 0 (black). All other pixels are converted to white. ***BLACKBOARD ASSIGNMENT "IMAGE INVERTER"
   4. Canny Edge detection 1 - show various high/low threshold combinations of the canny edge detection method. You can choose various combinations as examples. ***BLACKBOARD ASSIGNMENT "CANNY PRELIM"
   5. Atan2 assignment: verify the angle/direction of the edges on these simple images ***BLACKBOARD ASSIGNMENT "ATAN 1"
      • 
        triangleSmall2.ppm
      • 
        triangle2Small1.ppm
      • 
        hexagonSmall1.ppm
      • Assignment for Atan2 preliminary exercise
   6. Canny Atan application - verify your atan version of the canny edge detection sharpens the edges of the non-atan version ***BLACKBOARD ASSIGNMENT "CANNY ATAN APPLICATION"
   7. Circle Preliminary Assignment ***BLACKBOARD ASSIGNMENT "CIRCLE PRELIM"
      • 
        Circle.ppm
      • Assignment for Circle preliminary exercise (OPEN WITH OPENOFFICE - ABIWORD distorts the format)
      • Use atan to find the normals to the circle's curve. Using these normals, highlight the approximate center of the circle. Here's a version that rounds the angles of gradY and gradX to the nearest 45 degrees:

        
        

      • CircleCenterExampleTrace (.doc) for a 20 cols by 16 rows circle image: CircleSmaller.ppm

   8. Use another test image with circle(s) and show the approximation of the center(s) of the circle(s). For example, here's a sample face image, trying to locate the eyes: ***BLACKBOARD ASSIGNMENT "CIRCLE LOCATOR"

      
      

      
      

      If you want to use the above face image: image2.ppm

   9. Connected component images - Identify how many separate figures there are, and count the pixel size of each of these "connected" components
   10. Handouts
       • Assignments Feb 20 (OPEN WITH OPENOFFICE - ABIWORD distorts the format)
       • Circle Preliminary Example (OPEN WITH OPENOFFICE - ABIWORD distorts the format)
       • Canny Edge Detection Demo 1
       • Canny Floodfill step 1
       • Pgm and Ppm

3. Languages:
   • Python.org, Python tutorial (Guido van Rossum), Beginner's Guide, more documentation from the Python site
   • Lisp programming links
4. The old course...AI 2000/2003 with Eliza.