delete drawn shape from image

Question

mary 2011-6-2

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https://ww2.mathworks.cn/matlabcentral/answers/8663-delete-drawn-shape-from-image

评论： Himanshu Giria 2021-1-5

hi,

I have drawn several ellipses using imellipse instruction on an image in a figure. when i choose one of those ellipses and wanna delete it using 'delete' key, it doesn't work. how can i do it? tnx

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Answer 1

Walter Roberson 2011-6-2

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https://ww2.mathworks.cn/matlabcentral/answers/8663-delete-drawn-shape-from-image#answer_11934

gco() should return the handle of the currently selected object. Selecting is just a matter of clicking (once) on the object. Recognizing the delete key would be done by setting KeyPressFcn callback for the figure: be sure to check the event data to be sure the proper key was pressed. It might also be a good idea to get() the Type of the current object and check it, so that you only delete the kind of objects you want.

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Himanshu Giria 2021-1-5

Thank you

Himanshu Giria 2021-1-5

It worked

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Answer 2

Sean de Wolski 2011-6-2

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https://ww2.mathworks.cn/matlabcentral/answers/8663-delete-drawn-shape-from-image#answer_11926

在 MATLAB Online 中打开

H = imellipse(...);
delete(H);

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mary 2011-6-2

tnx for your reply,

but i have loaded an image in a figure, and drawn more than one ellipses on it.now a user should select one of them and after pressing delete key it must be deleted.

i don't know how to write the code of selecting and getting the input key by user.

tnx

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