what is a code for push button of filter type by selecting its type from popmenu having various filters like low pass, high pass,median etc.?

also mention the code for low pass filter, high pass filter & median filter.

Answer 1

[Image Analyst]

Get the index of the item that was selected in your popup control from your pushbutton callback function like this:

selectedItemNumber = handles.popup1.Value;

Then use that index number however you want.

[Abhishek Ghai]

ok accepted bt when i use this to get the string value of popup menu it doesn't work, why? i use this code: x=get(handles.popupmenu,'String'); why this code don't work?

[Abhishek Ghai]

where is the code for low pass,high pass & median filter?

[Walter Roberson]

menu_items = get(handles.popupmenu, 'String');
index_chosen = get(handles.popupmenu, 'Value');
menu_item_chosen = menu_items{index_chosen};

For filters see http://www.mathworks.com/help/dsp/examples/designing-low-pass-fir-filters.html and http://www.mathworks.com/help/dsp/examples/designing-low-pass-fir-filters.html

[Image Analyst]

Abhishek, the string property is a list of all the items in the listbox - a cell array of words or sentences. The value property is the index number of the item that they have showing in the popup. For example it the second item is the one that is showing, handles.popupmenu.Value will be 2.

For low pass and high pass filters, you can use conv2() or imfilter. A low pass filter would be like ones(9) or whatever. A high pass filter would have a positive central value surrounded by negative values such that the total sum sums to zero.

For median filtering, you can use medfilt2().