CS 248: Midterm Solutions

Problems

1. Color, Alpha, Halftoning
2. Compositing
3. Window Systems and Graphics Architectures
4. Signal Processing
5. Double-Step Line Drawing

Score Distribution

Here is a graph of the overall distribution of grades:

Regrading Policy

While we made every effort to grade every test correctly, we do occasionally make a mistake, and so part of the intent of posting the midterm solutions is to help you make sure that you were graded correctly. To help you do that, we included our grading criteria with each of the solutions. The same criteria were used for everyone. It is unlikely that we will change your grade if you merely disagree with the criteria we used, since that would be unfair to others in the class.

If you feel that you were misgraded, first check your solutions against our grading criteria. If you still feel that your grade is incorrect, then you are welcome to ask for a regrade. Here is the procedure:

• Send an e-mail message to the grader of the problem or to cs248tas@graphics.stanford.edu containing a detailed explanation of why you think you were misgraded, and how you think your grade should be adjusted to make it match our criteria.
  
  
• The grader will answer your request for a regrade. If he agrees with you, he will adjust your score. If he disagrees, he will tell you why. If after this procedure, you still do not think your grade is fair, you should write a final summary of the case and send email to hanrahan@cs.stanford.edu. He will make the final call.

Please don't take the requirement that you submit regrade requests in writing to mean that we don't want to discuss the midterm problems with you! Feel more than welcome to visit any of the TAs (or even better, the grader of a specific problem) to discuss a midterm question in detail. Just please do not ask for a regrade, except in writing, through e-mail.