Cycling 74 » Topic: Slow scan frame grabber help http://cycling74.com/forums/topic/slow-scan-frame-grabber-help/feed Thu, 20 Jun 2013 03:38:41 +0000 http://bbpress.org/?v=2.2.4 http://cycling74.com/forums/topic/slow-scan-frame-grabber-help/#post-57003 <![CDATA[Slow scan frame grabber help]]> http://cycling74.com/forums/topic/slow-scan-frame-grabber-help/#post-57003 Mon, 09 May 2011 15:26:44 +0000 Neal Johnson Back in the 80′s there was this video frame grabber made by Koala for the Mac. You plugged in a video camera, aimed it at something not moving, hit a button, and it slowly (10 plus seconds or more) grabbed the frame in black and white. The subject had to be still because of the slow frame grab. But if it moved it got real interesting. I want to recreate this effect and I have been looking around trying to figure out how I can sample each column of ARGB pixels, from left to right, in a matrix fed by live video, into another matrix to create a still image. I want to grab a column, say every 0.02 seconds (an adjustable amount), across the 720 columns of pixels. And suggestions on where to start? Thanks!

]]> http://cycling74.com/forums/topic/slow-scan-frame-grabber-help/#post-204252 <![CDATA[Re: Slow scan frame grabber help]]> http://cycling74.com/forums/topic/slow-scan-frame-grabber-help/#post-204252 Mon, 09 May 2011 16:53:16 +0000 jonathanb Something like this maybe?

– Pasted Max Patch, click to expand. –

]]> http://cycling74.com/forums/topic/slow-scan-frame-grabber-help/#post-204253 <![CDATA[Re: Slow scan frame grabber help]]> http://cycling74.com/forums/topic/slow-scan-frame-grabber-help/#post-204253 Mon, 09 May 2011 18:25:55 +0000 Neal Johnson YES! Thank you!!! Now to play with it!

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