Unformatted text preview: and exposure times. • Astronomical examples, CIDs and long integration times. • Do you like high SNR or low SNR? What happens when σ gets larger than μ ? (Noise greater than Signal) • Where does noise come from? Lights. Fans. 60 Hz. Notch filters. • How do you decrease noise? (Turn up the lights, larger aperture, longer integration.) How do you increase noise (dark, fast exp.) Cameras and Linearity • Explain what is meant by a “linear” system (not Ax + B) • Describe Superposition Gain and Offset • Show examples in Photoshop (with “Curves.”) • Ax + B (Which is Gain? Which is offset?) • What does this have to do with the brightness and contrast knobs on your TV? • Gain = Constrast/Slope; Offset = Brightness/y-intercept Transfer Function • Example: Point-spread function • Characterize System....
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This note was uploaded on 03/02/2012 for the course C S 450 taught by Professor Morse,b during the Winter '08 term at BYU.
- Winter '08