How to get jpeg/png image for processing thanks to GUI?

Question

Giovanni Lo Bocchiaro 2017-12-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/373312-how-to-get-jpeg-png-image-for-processing-thanks-to-gui

回答： Jan 2017-12-17

Well I need to browse my folder, get an image (basically .jped or .png) and then processing that image (filter, segmentation etc). I already create my GUI

but my problem is how to get this image in my main code. Let's explain better.

I have this callback function:

and then on my main i just have I = browse; ---> Where browse is the name for this GUI but I don't get my image and then I can't process it, so how can I do? I'd like to obtain something like that on my workspace:

Thanks for any help :)

3 个评论
显示 1更早的评论隐藏 1更早的评论

Giovanni Lo Bocchiaro 2017-12-17

It's ok, I get it, but my problem is that i can't process my image (which is called I for example) on my main code, because it doesn't appear on my workspace.

I want to browse for an image, save on my workspace and then work on this image (converto from rgb to gray for example!): how can i get image output fron GUI after browse and select?

Walter Roberson 2017-12-17

See the link that Image Analyst provided.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2017-12-17

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/373312-how-to-get-jpeg-png-image-for-processing-thanks-to-gui#answer_296599

See the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

If you just need to get the image out of an axes in a callback, you can use getimage().

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Jan 2017-12-17

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/373312-how-to-get-jpeg-png-image-for-processing-thanks-to-gui#answer_296625

What is "my main" and "my workspace"? Remember, that each function has its own workspace.

You can use e.g. guidata to store a value in the figure (to be exact in the struct called "handles", when you use GUIDE). This can be used to share data between callbacks. It is recommended, not to create a variable ion the base workspace or in another function, because this remote creation of variables is hard to debug and prone to bugs. Prefer to process all data inside the GUI by using callbacks, e.g. a "Process" button. You know this behavior from almost all other programs running on your computer.

Maybe you want the GUI just to be a kind of "open file dialog" called from a main program. Then use an output from the dialog: https://blogs.mathworks.com/videos/2010/02/12/advanced-getting-an-output-from-a-guide-gui/. You can find such links asking your favorite internet search engine for "Matlab GUIDE output".