imwrite 16-bit

[gregj]

I am relatively new to Octave, and have a question regarding imwrite()
functionality.

When trying to create a 16-bit .png file using imwrite, the following code
works:

img=zeros(480,752,"uint16");
r=500;

for y=1:480
   for x=1:752
        img(y,x)=uint16(x);
   endfor
endfor

imwrite(img,"test.png");                

and this doesn't:

img=zeros(480,752,"uint16");
r=500;

for y=1:480
   for x=1:752
        img(y,x)=r;
   endfor
endfor

imwrite(img,"test.png");                


I am simply trying to fill a 16-bit png with a constant value. I seem to be
missing something; any help would be greatly appreciated.

thanks!




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