MATLAB: How to set grayscale just between 100 to 250

Question

Dear all, Im a newby to matlab.I have 8bit gray scale image "X". I want to set the gray level just between 100 -250. Any respond will be appreciated. Thanks

Answer 1

The question is not clear. But let me guess:

X = randi([0, 255], 640, 480, 'uint8');  % Example image
X(X < 100) = 100;
X(X > 250) = 250;

Or:

X = min(max(X, uint8(100)), uint8(250));