how to calculate intensity of an image?

I have some images. My task is to calculate intensity of these images. Initially I used color plane (for e.g red, green etc) but I would like to know some new image feature to calculate its intensity and see the difference. Is there any other image feature to calculate its intensity in MATLAB?

Answer 1

[Image Analyst]

The intensity is the image itself. If you have some other definition, please state it. If you don't, then state what you plan on doing if you had some single number that is "the intensity" of the image. What is your next step?

[satish thapaliya]

I have some colored reaction product images. I know the value of the reactant(IgE Concentration). I have taken image of this reaction product. I now want to plot a graph between reactant value and its corresponding value in terms of image feature. I used color channel (red, green, blue etc) to plot curve between color channel and Reactant concentration (used to produce colored produt). I now want some more image features to see how will be the response in new image feature.

[Image Analyst]

Maybe you could threshold at some value to distinguish between no stain, heavy stain, and light stain. Then give the area fraction of each. See imquantize().