How do I create RAW image files in MATLAB?

I would like to use MATLAB in order to create binary RAW-files to store images.

The images I try to create using FWRITE do not open properly in Adobe Photoshop.

Answer 1

[MathWorks Support Team]

In order to create RAW-files for images in MATLAB, use the FWRITE function with 'uint8' or 'uint16' as the precision specifier, as in the example below (which creates a black image (all zeros) of size 100x100

 

cmodel=(zeros(300,100,1));
fid=fopen('blackimage.raw','w+');
cnt=fwrite(fid,cmodel,'uint8');
fclose(fid);

[Fady Samann]

the output image of this code is rotated by 90 degree and flipped compared to the original one!!!

Answer 2

[Fady Samann]

To have the image in the correct postion, use matrix transpose in the fwrite.

cmodel=(zeros(300,100,1));

fid=fopen('blackimage.raw','w+');

cnt=fwrite(fid,cmodel.','uint8');

fclose(fid);