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 predefined threshold. This ensures that the area has sufficient contrast and variation, allowing for effective enhancement. If the local variance is too low, the region might be too uniform for meaningful enhancement.