Convert RGB to Hyperspectral image

Hi,

I converted hyperspectral image to RGB to perform calculation on it.

I want to convert the RGB (the output after calculation) to hyperspectral image again

Is there a way to do that?

Thank you,

Answer 1

[Image Analyst]

How many extra spectral channels do you want? What information (image data) will go into them?

[Mona]

The size of the input hyper image is 1392x1040x500 uint16 ,I converted it to RGB image, performed the calculation on it, the output image of size 500x1392 logical

I want to convert the output to hyper image again with at least 50 bands: X 500 Y 1392 Z 50

to be able to read it and display it as BSQ format (This is my goal)

I hope that I answered the question right.

Thank you,

[Image Analyst]

Once you get it down to an RGB image, you've essentially lost all of the original spectral information. Then when you process it and end up with a binary image, there is no spectral information whatsoever. Plus, there is not even a reason to want your binary image to be a spectral image - it just doesn't make sense. I don't know why you created a binary image or what your plans for it are, but if you wanted a spectral image, just keep your original image hanging around - it has all the spectral information you need. I don't even know what these 50 bands should represent, nor have I dealt with BSQ format images (you may have to get a special writer function for that).

[Mona]

I converted the hyper to RGB to be able to perform some function on matlab that can't be performed on the hyper image (3D) .And I want to save the output as hyper, but I guess that's not possible.

I have read, display, and write functions for bsq format images. My main issue is that I want it back as hyper with my calculation on it to be able to save/dsiplay it as bsq.

Thank you for your fast response very appreciated

[Image Analyst]

What you want is, as I said, unnecessary. There is no reason to save a binary image as a hyperspectral image. However if you want to ignore my advice, I believe you can create a N-D image using cat():

hyperImage = cat(3, BW, BW, BW, BW, BW,....); 
% Put BW in there 50 times.
% Then save using your BSQ saving routine.

[Mona]

Thank you, I will try it.

[Image Analyst]

Like I said, I wish you wouldn't because it's not necessary.

Answer 2

[Image Analyst]

See this paper, which goes into great detail on the hyperspectral to RGB conversion process: http://my.ece.msstate.edu/faculty/du/JSTARS-VIS.pdf