Reshowing an image in a programmatic gui

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Ville
Ville 2011-7-7
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
  2 个评论
Sean de Wolski
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
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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回答（1 个）

Paulo Silva
Paulo Silva 2011-7-8
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
  5 个评论
显示 3更早的评论
Ville
Ville 2011-7-13
Deleting the old handles and redefining them afterwards seems to do the trick.
Image Analyst
Image Analyst 2011-7-13
MATLAB is case sensitive. So your "hIm" and "him" are different variables.

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