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Looper's Delight
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Ior Bock wrote: > 1.) Do you know how the golden mean, phi comes into play with video > feedback, especially when we see TV feedback > displaying the spiral / nautilus shell form ? It doesn't. > 2.) Is the feedback occuring within the mechanical circuity of the > feedback system a kind of resonance, and if so what exactly is it, what > is 'resonanting' and how? If the feedback consists of a video camera pointed at a television (or a webcam pointed at its own preview window on a computer screen) the whole system of video camera, television, and light waves can be said to be the thing that is resonating. > 3.) I'm hoping to emulate video feedback with software and am trying to > figure out basic algorithms that will let me do this, > I recently posted the below detailed query to a Visual Basic programmers > forum, but it seems like there was little 'feedback' > on this, can you offer any insights? Are there any code snippets > floating about that will let me do this that you may know of? > (Please see below) Digital video feedback usually involves getting access to the back-buffer, processing it somehow, and then blitting the processed image to the front-buffer. Google 'rotozoom', also check out http://www.piksel.no/pwiki/GePhex Note that what makes analog video feedback different to digital video feedback is the kind of things it's very difficult to emulate digitally - namely the specific color response characteristics and geometry of the video camera and television. You have actually played with a video camera and television, right? Or even a webcam and your computer monitor? -- Damian Stewart +64 27 305 4107 f r e y live music with machines http://www.frey.co.nz http://www.myspace.com/freyed