Define weber ratio? | Digital Image Processing LAB VIVA

The ratio of increment of illumination to background of illumination is called as web er ratio.(ie) Δi/i
If the ratio (Δi/i) is small, then small percentage of change in intensity is needed (ie) good brightness adaptation.
If the ratio (Δi/i) is large , then large percentage of change in intensity is needed (ie) poor brightness adaptation.

 

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