Calculating Light Intensity through video

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Andrew
Andrew 2014-6-19
评论： Image Analyst 2022-3-3
Using a camera, how can I detect light intensity and use that as a marker. Can someone guide me to a thread that could help me develop a script for this.
Thank you

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Image Analyst
Image Analyst 2014-6-19
Use the Image Acquisition Toolbox and call getsnapshot(). Then get the intensity from whatever pixels you want in the image.
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Andrew
Andrew 2014-6-19
Thank you for the reply. Unfortunately, I do not have access to that toolbox. Is there any way I can achieve this from scratch? Maybe get the video stream as a matrix and calculate the intensity through that?
Thanks
Image Analyst
Image Analyst 2014-6-30
With Release R2014a you can now access the webcam without the Image Acquisition Toolbox. See http://www.mathworks.com/support/2014a/matlab/8.3/demos/webcam-support.html

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