how to display variance of an image in command box?

median_image=medfilt2(im_n) axes(handles.axes3); imshow(median_image);

%variance% IM= im2double(median_image); V_image = var(IM(:));

[KALYAN ACHARJYA]

Command Box Means?

Answer 1

[Image Analyst]

Get rid of the semicolon and the value will report to the command window:

V_image = var(IM(:))

Beware though that im2double will scale the image to the range 0-1, so your variance will be the variance of that scaled image, not of the original image. If you want the variance of the original image, use double() instead of im2double().

[Komal Gaikwad]

ok sir thank u so much,also i have to compare two images one from median filter and other from wiener filter..how to compare them using variance or by using some other parameters