For a local enhancement using mean and variance, there is one condition: σs(x, y) ≤ k2DG, where, MDG is global standard deviation, k2 a positive constant and σs(x, y) a measure of contrast at point (x, y). Then, which fact is true for k2 if its values is less than 1.0?

Question

For a local enhancement using mean and variance, there is one condition:

Answer 1

For a local enhancement using mean and variance, there is one condition: the local variance should be greater than a specific threshold value. This ensures that the region being enhanced has enough contrast or variation, making it suitable for effective enhancement. If the local variance is too low, the enhancement may not significantly improve the details.