Conversion of Medical image to Blue Ration

Respected Members! My task is to convert RGB image to Blue ratio image.

This is the formula of conversion:

and code is

% RGB to Blue Ratio Conversion %--------------------------------------
R= img(:,:,1);
G=img(:,:,2);
B=img(:,:,3);
BR=((100 * B)./(1+R+G)) .* (256./(1+B+R+G)); % formula for conversion
imshow(BR);

The expected output can be seen in this image after running the code.

But when I apply the code...the output is a black image -- there is no sign of anything in image. Here is the input image:

Kindly help. How I can fix this issue so that I can see the contents of image?

Answer 1

[Dishant Arora]

use:

imshow(BR , [])

Or

imagesc(BR)

[Tahir]

Thanks sir its working.

[Tahir]

I have to use this image for further processing ...what can i do next..the output is 100% correct...but for further processing what i do.

imshow(BR , []);

i have to apply filter on this image.reply plz

[EDIT]

The issue is solved after obeying the instruction from him..Good job sir.

[Dishant Arora]

Use your image as it is for further processing or cast it to double using im2double as Image Analyst said.

Answer 2

[Image Analyst]

You need to cast to double because (B+R+G) will get clipped at 255 if you dont and just leave them as uint8!!! Then display with [] option in imshow like Dishant showed you.