import image and image processing functions

i have 2 buttons in gui. on clicking 1st button,i want it to import an image(palm image) stored on computer to workspace . on clicking the 2nd button,it should use that imported image and convert it to binary form and perform canny edge detector on it and then display the image ( basically i am extracting palm lines from the imported image to find symbols on it and make analysis based on symbol)

Answer 1

[Image Analyst]

You can attach your image to handles, make it global, or use setappdata(). See the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F