You may be well aware of these issues, however I'll mention them just in case... The CCD imaging of astromical objects adds some interesting problems to imaging in general... Stability - You will need to grab many fields and integrate them to produce a good image. In that time the imager must be tracking the object and be very steady. That includes electronically. You need a good low-noise converter and a pretty good camera. And good cabling soas to keep noise as low as possible. Spatial accuracy - You will need to use a pretty good lens too and to compensate between fields in the frame. While in astro the trig says the difference in array rows has only a small effect the interlace in most cameras must be handled properly. Color - Here the rendition is only important if you are interested in color. If you are you should know the color curves for the camera and that of your final output device. This is a complex subject by itself. Do not compress your images anywhere along the path. In astro you are looking for the detail. There are a lot of good references, and some commercial products, that will help make it fun and useful. As far as 4l or 4l2 the choice should be 4l2 only because it will offer better reliability and control. Good luck... -----Original Message----- From: video4linux-list-admin@xxxxxxxxxx [mailto:video4linux-list-admin@xxxxxxxxxx]On Behalf Of Gerry Creager N5JXS Sent: Saturday, October 27, 2001 8:13 AM To: video4linux-list@xxxxxxxxxx Subject: V4L and astroimaging? Anyone been playing with a CCD device and astrophotography using V4L or V4L2? I'm looking for some pointers and apps to modify or eventually write. TIA, gerry -- Gerry Creager -- gerry@xxxxxxxxxxx Network Engineering Academy for Advanced Telecommunications and Learning Technologies Texas A&M University 979.458.4020 (Phone) -- 979.847.8578 (Fax) _______________________________________________ Video4linux-list mailing list Video4linux-list@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/video4linux-list
