<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>Hi there</div>
<div>I would like to ask you if it is possible to do image stacking with gstreamer on an v4l source.</div>
<div>There are a lot of cameras out there that can do image stacking internal also called "integration".</div>
<div>Many astronomical cameras can do internal integration up to 30 seconds.</div>
<div>This cameras do an image addition like it is done in astronomy. The stacking increases low light scenes</div>
<div>and reduces some noise. Lets say I have an ordinary webcam</div>
<div>that sends 30fps to v4l. Is it possible to somehow stack those 30 images to have a "slow shutter",</div>
<div>brightness enhanced 1 fps video? There's a video on yt that shows what I mean:</div>
<div>https://www.youtube.com/watch?v=DcITFgbWNtU</div>
<div> </div>
<div>Is this somehow possible or is someone aware of any linux dsp software that can do that in realtime?</div>
<div> </div>
<div>My goal is to use an ordinary webcam, modify the stream to have an 10fps stacked video out that will be</div>
<div>redirected to v4l2loopback. The v4l2loopback then can be used in kstars as guiding camera source.</div>
<div> </div>
<div>I know that openPHD does it but the video cant be piped out.</div>
<div> </div>
<div>greets</div>
<div>Paul</div>
<div>pb.g@gmx.de</div></div></body></html>