How to check the Input Image ???

I have two different jpg images that are converted from DICOM format. I want to use different threshold functions for each ( optimal thresholding for 1.jpg) and ( Otsu's method for 2.jpg). I would like to check input image first(doesn't mean to check class, bit depth) before thresholding. Please, suggest me how can I check.

[Walter Roberson]

http://www.mathworks.co.uk/matlabcentral/answers/43073-a-guide-to-tags

Answer 1

[Walter Roberson]

imfinfo() can be used to check information such as bit depth and samples per pixel and lossless compression or not.

[May]

Thank a lot for your suggestion. But I do not mean to check the image info. In 1.jpg, the background is gray and in 2.jpg the background is black. Can I check (e.g. graylevel)? I am not sure what properties I should use to check.

[Image Analyst]

Check the histogram with imhist() or histogram().

[May]

Thanks for suggestion.