pcalexander
New member
Hello,
I have attached my jpegs of my stacked and calibrated Ha, Oiii and Sii data. The calibration frames that I used are darks, flats, dark flats, and bias. Whenever I execute the batch preprocessing script, I still have grainy/noisy images.
The grainy noise is present my uncalibrated stacked images, so I don't think that the calibration frames are causing it. The root is possibly my filters since I just received my astrodon filters in the mail. It is possible that cleaning them will eliminate this issue, but I would like to save this data.
The Ha is 3h (90x120s), the Oiii is 1.4h (28x180s), and the Sii is 1.4h (43x120s) all shot at 76 gain, 15 offset at -10C with a ZWO ASI1600mm.
Ha: https://drive.google.com/file/d/1VPEs5cR-CSn_FVqwOi10LsXnxHb2GAfr/view?usp=sharing
Oiii: https://drive.google.com/file/d/1IPUCQYWk4t6JjRGxDhMTnyIncj9jhVmI/view?usp=sharing
Sii: https://drive.google.com/file/d/10T0_JekyN1dzv3kzUYMpPajDkuGvL1_m/view?usp=sharing
The jpeg looks the worst for the Sii.
Are there any tips for removing this noise?
Thanks,
Phillip
I have attached my jpegs of my stacked and calibrated Ha, Oiii and Sii data. The calibration frames that I used are darks, flats, dark flats, and bias. Whenever I execute the batch preprocessing script, I still have grainy/noisy images.
The grainy noise is present my uncalibrated stacked images, so I don't think that the calibration frames are causing it. The root is possibly my filters since I just received my astrodon filters in the mail. It is possible that cleaning them will eliminate this issue, but I would like to save this data.
The Ha is 3h (90x120s), the Oiii is 1.4h (28x180s), and the Sii is 1.4h (43x120s) all shot at 76 gain, 15 offset at -10C with a ZWO ASI1600mm.
Ha: https://drive.google.com/file/d/1VPEs5cR-CSn_FVqwOi10LsXnxHb2GAfr/view?usp=sharing
Oiii: https://drive.google.com/file/d/1IPUCQYWk4t6JjRGxDhMTnyIncj9jhVmI/view?usp=sharing
Sii: https://drive.google.com/file/d/10T0_JekyN1dzv3kzUYMpPajDkuGvL1_m/view?usp=sharing
The jpeg looks the worst for the Sii.
Are there any tips for removing this noise?
Thanks,
Phillip
Last edited: