Save image from GUI to desktop/folder

So I am trying to save an image from my GUI in a folder when I press pushbutton embeddimage.

toBeSavedm which is the same image from earlier, originalRounded, is the picture I want to save and it is in workspace.

I am trying to use the uiputfile and imwrite functions, but somehow the image that is saved in my folder is different, the data is changed.

toBeSaved=handles.originalRounded;

assignin('base','toBeSaved',toBeSaved);

[fileName, filePath]=uiputfile('*.jpg*', 'Save toBeSaved as');

fileName = fullfile(filePath, fileName);

imwrite(toBeSaved, 'fileName', 'jpg');

guidata(hObject, handles);

or is there any other way to save an image from GUI to my folder?

[thuvo thi]

Excuse me, can I ask you one question? With DICOM image, how do you save it?

[Stephen23]

" the data is changed."

That is what jpeg does. If you don't want that then use a lossless format.

Answer 1

[Walter Roberson]

imwrite(toBeSaved, fileName, 'jpg');

No quotes around fileName

You need to expect that data will be changed when you use JPEG, unless you specifically request lossless storage. JPEG is a format for "scenes" and does not preserve sharp lines well and is permitted to change saved values.

[OJ27]

what if I want to use the image content that appears in one of the figures in the GUI but it is not in the workspace? I want to show the image content of one of the handles. I can't use a global variable but I thought I would "grab" the current content and then display it in another figure.