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write (save) an image file

Asked by Elysi Cochin

Elysi Cochin (view profile)

on 31 Jan 2014
Latest activity Commented on by Syed Mobashir

Syed Mobashir (view profile)

on 12 Mar 2015

i had a .mha file, i used the below two lines to display the image and i get the first full image as in the link below....

 V = mha_read_volume('BRATS_HG0001_truth.mha');
 imshow(squeeze(V(:,:,round(end/2))),[]);

please can someone help me how to save that image to a jpg or bmp or tiff file....

i tried

 imwrite(squeeze(V(:,:,round(end/2))),'filename.bmp')

but i'm not getting the image... i get the outline of the image as shown in link (image(b))... what should i do to save as image(a)

http://imageshack.com/a/img838/8308/yc91.png

0 Comments

Elysi Cochin

Elysi Cochin (view profile)

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1 Answer

Answer by Walter Roberson

Walter Roberson (view profile)

on 31 Jan 2014
Accepted answer

Notice that when you call imshow you are providing the [] second parameter. That tells imshow() to effectively shift and scale the data so that it runs between 0 and 1. You can do the same tranformation:

newimage = squeeze(V(:,:,round(end/2)));
minimage = min(newimage(:));
maximage = max(newimage(:));
scaledimage = (newimage - minimage) ./ (maximage - minimage);
imwrite(scaledimage, 'filename.bmp');

4 Comments

Image Analyst

Image Analyst (view profile)

on 31 Jan 2014

Try casting everything to double to do the math, then cast back to uint8 inside the call to imwrite().

Elysi Cochin

Elysi Cochin (view profile)

on 31 Jan 2014

now it worked... thank you Walter Roberson and Image Analyst for your help....

Syed Mobashir

Syed Mobashir (view profile)

on 12 Mar 2015

i am also getting the same black image. can you tell me this code? plzzz i need this urgent

Walter Roberson

Walter Roberson (view profile)

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