Re: what is the meaning of the crop and overlay window?
- Date: Tue, 12 May 2009 20:34:03 +0000
- From: g <geleem@xxxxxxxxxxxxx>
- Subject: Re: what is the meaning of the crop and overlay window?
xie wrote: > when i read the v4l2 spec, i can't understand the concept of crop and > overlay window. who can tell me what is the difference of them? thanks a > lot~~ having been in 'still', 'movie' and 'video' photography for many years, such a question would be rather involved for me to answer. tho my reply may not coincide with what is referenced in v412 spec, maybe this will help until someone else can give you a more precise answer. easiest thing to do was 'wikipedia.org'. http://en.wikipedia.org/wiki/Cropping_(image) http://en.wikipedia.org/wiki/Video_overlay simplified; crop: remove or reduce proportions of image. overlay: show multiple images superimposed over another. -- peace out. tc,hago. g . **** in a free world without fences, who needs gates. ** help microsoft stamp out piracy - give linux to a friend today ** to mess up a linux box, you need to work at it; to mess up an ms windows box, you just need to *look* at it. ** learn linux: 'Rute User's Tutorial and Exposition' http://rute.2038bug.com/index.html 'The Linux Documentation Project' http://www.tldp.org/ 'LDP HOWTO-index' http://www.tldp.org/HOWTO/HOWTO-INDEX/index.html 'HowtoForge' http://howtoforge.com/ ****
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