An update to this article is available!
A new version of yaaca is available. Source code is now on github.
- Intel 32 bit executable and deb package
- Intel 64 bit executable and deb package
- Armel executable and deb packages (runs on armv5 and higher, tested on OpenRD platform)
Yaaca depends only on libusb-1.0 and GTK2, so it runs without problems on older distributions like Debian Squeeze.
A python interface is also available on github. Just copy the libASICamera.so that comes together with the Linux SDK released by ZWO Optical.
- All the cameras from ZWO should work, maximum resolution is dynamical set.
- Focusing aids have been added. They are activated in zoom mode and are under the zoom window. You can see the position of the centroid of pixels with a value (mean of RGB in color mode) greater than 64, theirs standard deviation and maximum value for pixel in the zoom area and on a 3×3 area centered o nthe centroid coordinates. The next checkboxes are “save” for saving the centroid position to a file yaaca.log (useful for evaluating tracking precision) and “prof” that show the profile of pixel value. If main screen crosshair is activated the profile is referred to it (useful if you have precise tracking) otherwise it’s referred to the centroid. The position of the centroid is showed as a red cross in the zoom window. So many strategies for focusing are available. You can center just one star with value > 64 in the zoom window (use crosshair positioning and zoom) and look to minimize standard deviation and have a sharp profile. Otherwise you can regulate gain and exposition to have a star with a value a bit under 64 in value. Focus till centroid cross tracks the star and is not jumping erraticaly around the center of the zoom screen. When this is achieved reduce gain or exposure and try again until satisfied.
- Optimized USB bandwidth control for ARM machines
- Added blind control when capturing: on-screen display is turned off when capture is activated. This is useful for very low performance machines.
- FPS is always shown
- File names are compatible with FAT file systems (for SDs)
- Camera parameters are saved on exit and recalled on start-up. The same parameter are loaded by pyasicam on start-up. This is useful if we use yaaca to do focusing and gain/exposure adjust and the use pyasicam for all-night capture.
- The value of pixel under main screen crosshair is shown near it’s position (to check of not having over-exposed areas)