16bit and 32bit files
Posted: Thu Jun 23, 2022 6:50 pm
Hi Robin,
I activated my license tonight and have just live stacked with both display screen stretch reset and the large window histogram reset. I am using a 14bit QHY168C without debayer turned on. I am continuously live stacking 20 subs (for now). It is not by sequencer but the Save and Reset tick box in the live stack dialogue box.
After the 20 subs done are done SharpCap saves the image in both 16bit and 32 bit. The 16 bit file image has a background of approximately .01 Pixinsight. The 32 bit file has background of.5, and does not look nice when I apply a screen stretch it. The 16 bit file has a background of 0.015.
I would like to know why the 32 bit file looks so bad (poor contrast), and why the background is poor contrast? In Pixinsight I can change the readout integer range to 32 bit (4G), and the background level reading drops from .5 to .21, but that is far from .015.
The live stack bit depth starts at 14 bit, then after the 19th sub the bit depth is 18.2. So does this mean the 16 bit image file will not be a good choice?
Thanks,
Roger
I activated my license tonight and have just live stacked with both display screen stretch reset and the large window histogram reset. I am using a 14bit QHY168C without debayer turned on. I am continuously live stacking 20 subs (for now). It is not by sequencer but the Save and Reset tick box in the live stack dialogue box.
After the 20 subs done are done SharpCap saves the image in both 16bit and 32 bit. The 16 bit file image has a background of approximately .01 Pixinsight. The 32 bit file has background of.5, and does not look nice when I apply a screen stretch it. The 16 bit file has a background of 0.015.
I would like to know why the 32 bit file looks so bad (poor contrast), and why the background is poor contrast? In Pixinsight I can change the readout integer range to 32 bit (4G), and the background level reading drops from .5 to .21, but that is far from .015.
The live stack bit depth starts at 14 bit, then after the 19th sub the bit depth is 18.2. So does this mean the 16 bit image file will not be a good choice?
Thanks,
Roger