cant write image exactly shown by imshow

hi every body. i have written a code which the result in imshow is ok but when i want to imwrite it, its different and wrong. could any body help me please?

Echo = imread('echo60%-croped-SRAD.jpg');
Mask = imread('mask60%.jpg');

Echo = mat2gray(Echo(:,:,1));
Mask = mat2gray(Mask(:,:,1));

Echo_Com = imcomplement(Echo);

Echo_Com_Final = (Echo_Com.*Mask)*255;

imshow(Echo_Com_Final, [0 255]);

imwrite(Echo_Com_Final,map,'echo60%-croped-SRAD_complement.jpg')

[Thiago Henrique Gomes Lobato]

What "map" are you using? Are you sure it is the right one? Have you tried without it? Also, what exactly you mean by different and wrong?

[talayeh ghodsi]

thanks for your respond sir

i will attach the result images of

imshow(Echo_Com_Final, [0 255]);

and

imwrite(Echo_Com_Final,'echo60%-croped-SRAD_complement.jpg'

Answer 1

[Image Analyst]

To write the image exactly as it is shown, you can use getframe() and then imwrite(). Keep in mind that this is like a screenshot so it won't have the same size and values as the original, underlying image, but it will be "exactly shown by imshow" that you requested

displayedImage = getframe();
imwrite(displayedImage, filename);

Or you can use export_fig()

[talayeh ghodsi]

exatly because of the change of the size of the result image after save as, i want to save it by imwrite. I need to keep the original size of the image