How change unit8 pixel value to intensity data

Hi,

I have an image storted in a raw. format. The sizes are 673*1094*1215. I want to open it with Matlab and to find the intensity data (between 0 to 1). I tried with the the following code :

fid = fopen('P1.raw','r');
data = fread(fid, 673*1094*1215,'uint8=>uint8');
fclose(fid);
data = reshape(data, [673, 1094, 1215]);
Datatshow=flip(data(:,:,1057)'); %data of one slice
imshow(Datatshow);

But I did not find how I can convert the unit8 data to inentsity data.

Thanks for your help!

Answer 1

[Simon Chan]

Try function im2double

[ConanTaieb]

Thank you Simon,

im2double convert to double data not intensity

Answer 2

[Stephen23]

https://www.mathworks.com/help/matlab/ref/im2gray.html

[K. Taieb]

Thanks