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Single frame grab from webcamSingle frame grab from webcamThanks all in advance, helping my son with a QC science fair project and we're newbies so appreciate any guidance... We've built a rig to photograph peoples irises using a USB webcam, able to select it (video input patch) and getting a realtime stream to the billboard. **Any hints at how to trigger (via spacebar) a single frame grab of that stream? ** Looking to grab a single frame (and then if it was a bad image or if they blinked,toggle the spacebar to get another single frame grab) and then use that as the basis for selecting a region of interest (the iris) and then doing some pixel by pixel analysis for color content. BTW I found that the Logitech c920 webcam is HD res, and using Webcam settings app By Mactaris, lets you override the autofocus, control gain and many other settings. http://mactaris.blogspot.com/p/webcam-settings.html
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