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 greater 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, the key condition is that the local mean should differ significantly from the global mean. This difference indicates that the region has unique features, making it suitable for enhancement. If the local mean is close to the global mean, enhancement may not provide much benefit as there may be little variation or contrast in that area.