Change color of a image according to pixel value. PLEASE HELP.

I want to change gray image to RGB according to pixel values. I mean, the pixel which are having higher values will be changed to red color and pixel

which are having lower values will be changed to bluish color. Mainly I am doing a project in which I want to change a thermal gray image to a image having temperature related image like hotter part having red color and colder part will be having blue color. PLEASE HELP ME. THANKS IN ADVANCE.

Answer 1

[Image Analyst]

Do something like

rgbImage = ind2rgb(grayImage, jet(256));

[Dhrubajyoti Das]

Any other way.... Actually i m totally new to MATLAB.

[Image Analyst]

Why do you need another way? What is the problem with a one-line solution using the ind2rgb() function?

[Dhrubajyoti Das]

I mean can u please explain how it works.... or can u please write the full code. Please sir it would be of great help.

[Image Analyst]

That is the full code. There is nothing more. jet(256) is a colormap. A color map is a pseudocolor lookup table that gives an output RGB color for every graylevel input value. ind2rgb applies that pseudocolor lookup table to the gray image and gives the RGB image as the output. Read carefully what I said and ask if there's anything you don't understand.