CS 111 - 3/28/17

Exam 2 in Class on TUESDAY 4/4/17

Same format as Exam 1
 - 20 multiple choice questions
 -  2 write code questions

Picture Algorithms 
 - color manipulation
     color negative
     gray scale
     brighten/darken
     posterization
     red-eye reduction

 - position manipulation
     mirror image
     rotation
     flipping
     duplicating
     cropping
     enlarging
     reduction  

Java Topics
  - looping/iteration statements
      while 
      for
      range

  - selection statements
      if
      else
      elif

  - boolean operator
      and
      or
      not

  - return statement  



Sound Manipulation - Chapter 7

Sounds manifest as waves

To digitize a sound, we record the amplitude of the wave
  as it crosses a point 
  (most often a microphone is at that point)

The .wav files we use in class will have 22,050 samples per second.

   (We record 22,050 amplitude values every second)

The amplitude values are stored as a 
   - signed (positive/negative) integer number
   - using 16 bits 
       - 65536 different values,
       - half postive, half negative
           (0 is considered positive for this)

Thus amplitude values range from -32,768 to +32,767