How to Detect a Inhomogeneity Region in Image I have an image that includes object and background. However, the object appears some inhomogeneity region due to illumination. My work is that how to detect inhomogeneity region. Which is feature can represent it? Example: low inhomogeneity-high/low feature value....Thank you so much



or
There are many properties of inhomogeneity:


Local Variance / STD.
Local Histogram.
The Gradient Function
Histogram of the Gradient.
Mean versus the Median / Mode.