Finding max and min value in a contour plot

Basically I am doing a contour plot for a 2D matrix. I want to find the exact value of the max and min value of the matrix. is it anyway to do it on contour plot directly? Thank you!

Answer 1

[Image Analyst]

Why not just get it from the matrix directly:

minIntensityValue = min(matrix2D(:));
maxIntensityValue = max(matrix2D(:));

Or did you mean the min and max x and y of the contour lines ?