GRDSN Technology Exercise

The Analysis of Tone / What is Bit Depth

Scenario: You are trying to explain to a client that you would like to use a posterized photo in a layout. The client wonders what it is and how it is created on a computer. You explain bit depth and show what happens when a photo is changed to reflect RGB, CMYK and posterized gray scale values of the image.

Instructions:

1. Print this page.
2. Click on the links below for an in-depth explanation of bit depth.
3. Use your printout to answer the questions below.
4. Bring your filled out answers to the next class

http://www.epi-centre.com/basics/basics2.html

http://archive.devx.com/projectcool/developer/gzone/reference/ref-bitdepth.html

http://www.library.cornell.edu/preservation/tutorial/intro/intro-04.html

http://www.mydesignprimer.com/equipment/20030.html

Student Name:

1. What is a bit?

2. How many levels of gray are in an 8 bit image?

3. Why do you need 24 bit color on your monitor to display a photo-realistic image in full color?

4. What does the histogram look like for a simple black and white image with no gray levels?

5. What is the difference between digital and analog photography?

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