CSC151 2010S, Class 13: Transforming Images

Overview:
* Questions on Exam 1
* Kluber's Visit
* Questions on the Reading
* Lab

Admin:
* Reading for tomorrow: 
  Documenting Your Procedures.
* Surprise!  No quiz today.
* EC for one of the Rosenfield Symposium talks this week.
* EC for Friday's CS table on common security flaws in Web sites.
* CAS petition (I neither endorse nor oppose this petition)

Exam 1
* Note: The other class is also identifying errors.  You get credit for those, too.
* Note: Yes, it's due on Wednesday.
* Can our stars look like two-year olds drew them in their sleep?  Yes.
* Can you give us a hint on drawing stars?  Circles.
* You're a CS prof.  Why can't you write clear instructions?  What do you want for the Warhol problems?
  * First one: FOUR COPIES OF THE DRAWING (two across, two down), each a different color
  * Second one: FOUR COPIES OF THE DRAWING (two across, two down), each with a different color background
  * Using just the normal drawing procedures

Kluber's Visit: What Did You Learn?
* Color (see the handout or outline)
* There's an importance to your composition
* There's an importance to your palette of 
  colors
  * And there are cool online tools that can
    help you choose palettes
  * And to see like Sam and Asa
* No representational art for your projects!
  No cats!  No trees!  No houses!  No suntanners!
* You need to create something that engages the viewer.  Predictable stuff doesn't engage the viewer.  Symmetry rarely engages the viewer.
* You can tell a story with even very simple shapes.  But, hey, you don't have to tell a story or have a message.  You can just explore.
* Know your audience!
* Artists and Computer Scientists approach the same image very differently.

Questions on the reading

Lab
* So, can you write an expression that does the inverse of rgb-redder (except at the extremes)?
* (o rgb-darker rgb-darker rgb-greener rgb-bluer)
* (lambda (rgb) (rgb-new (- (rgb-red rgb) 32) (rgb-green rgb) (rgb-blue)))
* (o rgb-complement rgb-redder rgb-complement)