Calculating Light Intensity through video

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Andrew
Andrew le 19 Juin 2014
Commenté : Image Analyst le 3 Mar 2022
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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YOGITAA YOGITAA
YOGITAA YOGITAA le 2 Mar 2022
Could you please share the code?
Image Analyst
Image Analyst le 3 Mar 2022
@YOGITAA YOGITAA See attached. Start a new question if you have question.

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Image Analyst
Image Analyst le 19 Juin 2014
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 le 19 Juin 2014
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 le 30 Juin 2014
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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