Reshowing an image in a programmatic gui

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Hi,

I have programmed a gui in which I use hImage = imshow(image) to show a binary image. Then I add some stuff to the image handle like scrollpanels and magnification box etc. I then make changes to the image itself (remove stains by changing some areas into ones (white)).

How can I show the image again in the same gui by replacing the old image with the new, edited image?

Using imshow(image) causes a long error log because of handle errors. Redefining hImage = imshow(new_image) along with all other functionalities (scrollpanels etc.) also causes errors.

-Ville

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Sean de Wolski 2011-7-7

Perhaps you could include some code. Are you using GUIDE?

Take a look at the axes command to get control of the axes directly.

Ville 2011-7-8

No, I'm not using GUIDE. Here's the code I use in the beginning to show my image and add those scrollpanels etc.

handles.hImage = imshow(handles.opened_ecg_file); % Show the image

% Set image hittest to 'on' so that it will react to mouse button presses

set(handles.hImage, 'HitTest', 'on', 'ButtonDownFcn', @button_down_fcn);

% Create scroll panels

handles.hScrollPanel = imscrollpanel(handles.fig, handles.hImage);

set(handles.hScrollPanel, 'Units', 'normalized','Position', [0 .1 1 .9]);

% Create magnification box

handles.hMagBox = immagbox(handles.fig, handles.hImage);

%pos = get(handles.hMagBox, 'Position');

set(handles.hMagBox, 'Position', [510, 25, 70, 25]); % Position the box

handles.hCoords = impixelinfo(handles.fig, handles.hImage); % coords box

Now, if I edit the image and try to replace the old image with the new one, I get a lot of errors.

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Answer 1

Paulo Silva 2011-7-8

在 MATLAB Online 中打开

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Everytime you use imshow you must also give that image the tools, example:

handles.fig=figure
handles.ax=axes
handles.hImage = imshow('trees.tif'); % Show the image 
% Set image hittest to 'on' so that it will react to mouse button presses 
set(handles.hImage, 'HitTest', 'on', 'ButtonDownFcn', @button_down_fcn);
% Create scroll panels 
handles.hScrollPanel = imscrollpanel(handles.fig, handles.hImage); 
set(handles.hScrollPanel, 'Units', 'normalized','Position', [0 .1 1 .9]);
% Create magnification box 
handles.hMagBox = immagbox(handles.fig, handles.hImage); 
%pos = get(handles.hMagBox, 'Position'); 
set(handles.hMagBox, 'Position', [510, 25, 70, 25]); % Position the box
handles.hCoords = impixelinfo(handles.fig, handles.hImage); % coords box
pause(2)
handles.hImage = imshow('cameraman.tif'); % Show the image 
% Set image hittest to 'on' so that it will react to mouse button presses 
set(handles.hImage, 'HitTest', 'on', 'ButtonDownFcn', @button_down_fcn);
% Create scroll panels 
handles.hScrollPanel = imscrollpanel(handles.fig, handles.hImage); 
set(handles.hScrollPanel, 'Units', 'normalized','Position', [0 .1 1 .9]);
% Create magnification box 
handles.hMagBox = immagbox(handles.fig, handles.hImage); 
%pos = get(handles.hMagBox, 'Position'); 
set(handles.hMagBox, 'Position', [510, 25, 70, 25]); % Position the box
handles.hCoords = impixelinfo(handles.fig, handles.hImage); % coords box

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Ville 2011-7-13

Deleting the old handles and redefining them afterwards seems to do the trick.

Image Analyst 2011-7-13

MATLAB is case sensitive. So your "hIm" and "him" are different variables.

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