Lab 4 Additional Information ECE637 Spring2013 Bouman - Rhea

Discussion for Lab 4, ECE637, Spring 2013

Additional Information

Before you jump into the lab, there is actually a difference for the monitors everyone is using. To ensure consistent result throughout the lab, I would suggest using the same monitor while doing calibrations!

Basic knowledge for gamma correction

• http://en.wikipedia.org/wiki/Gamma_correction
• http://www.siggraph.org/education/materials/HyperGraph/color/gamma_correction/gamma_intro.html
• http://en.wikipedia.org/wiki/Brightness

Extended information for something to do when you are bored

• http://en.wikipedia.org/wiki/High_dynamic_range_imaging

Fun experiment to do on your monitor(s)

• http://epaperpress.com/monitorcal/

Q&A Section

Q: My image looks really dark after correction.

A - Make sure you have both nullification and correction set correctly.

Q: In problem 3, I checked the "stretch" function in matlab help, but I did not find it. I got "stretchlim" from matlab help. Why do we need to use the syntax "stretch"?

A - I believe the lab is written that way so that you could write the equalization into function calls

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