Crop image from an axes used in a GUI

JR
2015 2 18
1 个回答
更新时间：2015 2 20
8 次查看（30 天）

0 个投票

listBoxStrings = get(handles.listbox1,'String');
ListBoxValue = get(handles.listbox1,'Value');
if(find(strcmp(listBoxStrings,'Afghanistan')) == ListBoxValue)
set(handles.text3,'String','Processing image for Afghanistan, please wait!');
Rect = imrect(gca,[50 20 50 50]);
setColor(Rect,'green')
setFixedAspectRatioMode(Rect,1);
fcn = makeConstrainToRectFcn('imrect',get(gca,'XLim'),get(gca,'YLim'));
setPositionConstraintFcn(Rect,fcn);
pos = getPosition(Rect);
I2 = imcrop(handles.axes1,pos);
imshow(handles.axes1,I2);
This code is linked to a button, when I push the button it gives me the square white crop on top of the image. I get an error though:
I can't crop the image, due to this error. The image is a JPEG
Thanks.

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回答（1 个）

JR
JR 2015-2-20

0 个投票

listBoxStrings = get(handles.listbox1,'String');
ListBoxValue = get(handles.listbox1,'Value');
if(find(strcmp(listBoxStrings,'Afghanistan')) == ListBoxValue)
set(handles.text3,'String','Processing image for Afghanistan, please wait!');
Rect = imrect(gca,[50 20 50 50]);
setColor(Rect,'green')
setFixedAspectRatioMode(Rect,1);
fcn = makeConstrainToRectFcn('imrect',get(gca,'XLim'),get(gca,'YLim'));
setPositionConstraintFcn(Rect,fcn);
pos = getPosition(Rect);
Crop = imcrop();
imshow(Crop, 'Parent', handles.axes1);
guidata(hObject, handles);
axis(handles.axes1, 'image')
This code works and I can now crop, but I am using my own free hand crop rectangle. How would I be able to still crop, but using the box I have already made?

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提问:

JR
JR
2015-2-18

回答：

JR
JR
2015-2-20

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