Integrating webcam into GUI

Question

Nathaniel Wolff 2020-9-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/599260-integrating-webcam-into-gui

评论： Image Analyst 2023-12-23

Im writing code for a robot which when it comes into contact with a wall (which I can alrady do) it stops and asks for for a user prompt. The prompt would check the webcam for a color then either go backwards or turn left/right. I think I need to use inputdlg or listdlg. I don't know how to make my integrated webcam an option for an input.

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Answer 1

Manas Meena 2020-9-28

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https://ww2.mathworks.cn/matlabcentral/answers/599260-integrating-webcam-into-gui#answer_501529

Webcam can be connected to MATLAB using the Image Acquisition Toolbox. Please refer to the document link below to learn how to use the Image Acquisition Toolbox.

https://www.mathworks.com/help/imaq/index.html?s_tid=srchtitle

The PREVIEW function has input arguments which allow you to specify a handle graphics image object where the video will be displayed.

If you want to achieve this without the Image Acquisition Toolbox you can use the USB Webcam Preview function, refer to the link below to learn how to use it.

https://www.mathworks.com/help/supportpkg/usbwebcams/ug/webcam.preview.html?s_tid=srchtitle

You can call upon preview in your code from a GUI callback.

Create an axes of the appropriate size and position (the preview has to be inside an axes).
Then create an image() of the appropriate size within that axes.
Pass the image object to preview.