CS430 - S'05
Lecture 03 : 1/20/05

Reading Assignment: 3 Gonzalez/Woods

Today's Topics

• Gray Level Transform
• Histogram
• Histogram Manipulation

"Please Restore My Account!"

• gnuplot for 2d functions (splot)

• Gray Level Transform

• Automatic Transform lecture
• For non-linear T(r), run T(r) on Look-Up table, it's faster.
• Gamma Correction.
• Reversible? Monotonically increasing. Still problems for reversing compression.
• Gray Level Slicing.
• Additional Slicing Transform
  

• Histogram

• Constructing a Histogram [Worksheet #2]
• Characterizing an image via a histogram. (Fig 3.15)
• Forcing a histogram like Fig 3.15 bottom? Equalization (Fig 3.17).

• Histogram Manipulation

• Automatic Equalization Lecture
• Equalization example: 1, 2, 3, and 4, and 5.