EE409_3_Fundamentals_of_DIP

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EE409 – Digital Image Processing 2017-2018 Spring

3. Fundamentals of Digital Image Processing

by: Dr. Gökhan Koray GÜLTEKİN (adapted from Dr.S.Gedik’s slides)

Light and the Electromagnetic Spectrum 

Three basic quantities 

Radiance: Total amount of energy that flows from light source (W)

Luminance: Amount of energy an observer perceives from light source (lumens – lm)

E.g.: Consider a high radiance IR source with significant energy

Zero luminance if an observer does not perceive

Brightness: perception

Subjective

descriptor

of

light

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