Crop image from an axes used in a GUI

2 次查看（过去 30 天）
JR
JR 2015-2-18
回答： JR 2015-2-20
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.

请先登录，再回答此问题。

回答（1 个）

JR
JR 2015-2-20
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?

类别

在 Help Center 和 File Exchange 中查找有关 Images 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by