Image watermarking using DWT GUI

How to do a "Save" and "Exit" button in Matlab Gui. I need help with the callback function

[Geoff Hayes]

Ubaashan - are you creating your GUI with GUIDE, App Designer, or programmatically? When the user presses the save button, presumably you want to save something to a file or...? Please clarify.

[Ubaashana Ramesh]

Geoff, I am using GUIDE. I am doing doing a GUI for Image watermarks. This is how it works, when the user has finished watermarking, the watermarked image has to be saved in the desktop - once the "Save" button is clicked.

Answer 1

[Geoff Hayes]

Ubaashana - in the (save) push button callback, you will save the data to file, possibly using imwrite. For example,

 function pushbutton1_Callback(hObject, eventdata, handles)

 % get the image data to save (from an axes or the handles structure)
 imgToSave = ...;

 % save to file
 filename = ...;
 imwrite(imgToSave, filename);

I'm assuming that you can easily get the watermarked image from the handles structure and that the filename is known (or are you asking the user for the filename?).