How i convert a normal image into underexposure and over exposure in matlab ????

Kindly tell me the code of converting an image into under exposure and over exposure ???

Answer 1

[Jan]

Do you have a mathematical definition for under- and over-exposure? This would be a good point to start from.

The pixel values of an overexposed picture are too high and the bright areas might be saturated:

RGB      = rand(640, 480, 3);    % Some test data
OverExp1 = min(1.0, RGB * 1.2);  % Scaled
OverExp2 = min(1.0, RGB + 0.1);  % Shifted

For scaling the minimum value of 0.0 is still possible, while for shifting the minimum value is lifted also. A combination of scaling and shifting is possible also.

The under exposure is equivalent.