Search found 37 matches

by Serg1
01 Oct 2018, 04:46
Forum: ASTAP General
Topic: Points when adding R, G, B frames.
Replies: 10
Views: 39135

Points when adding R, G, B frames.

Points when adding R, G, B frames.
See the picture.
Perhaps this is due to the algorithm of frame rotation. Or rounding pixel values when rotated.
by Serg1
01 Oct 2018, 04:40
Forum: ASTAP General
Topic: Black level
Replies: 12
Views: 26143

Re: Black level

Hello Han.
AstapX version works.
There is another problem, open in a new topic.
by Serg1
30 Sep 2018, 20:38
Forum: ASTAP General
Topic: Black level
Replies: 12
Views: 26143

Re: Black level

In Fitswork, you can change the black level on the histogram.
Setting in the ASCOM driver not change.
by Serg1
30 Sep 2018, 19:57
Forum: ASTAP General
Topic: Black level
Replies: 12
Views: 26143

Re: Black level

This file is blue filter. The sky dark. The milky way is clearly visible.
by Serg1
30 Sep 2018, 19:16
Forum: ASTAP General
Topic: Black level
Replies: 12
Views: 26143

Re: Black level

Han, I e-mailed the files.
Camera Skyrus453M-ICX453AQ.
by Serg1
30 Sep 2018, 16:12
Forum: ASTAP General
Topic: Black level
Replies: 12
Views: 26143

Re: Black level

Calibrated light = (Light frame)-(Dark frame) = (offset+darkcurrent_1+ light)-(offset+darkcurrent_2)=darkcurrent_1+ light-darkcurrent_2 darkcurrent_2 not equal darkcurrent_1 because they are random processes. darkcurrent_2 = darkcurrent_1 they will be equal only if the number of frames is infinite. ...
by Serg1
30 Sep 2018, 05:31
Forum: ASTAP General
Topic: Black level
Replies: 12
Views: 26143

Black level

Hello Han.
After calibration, the color black is very black.
What happens to pixel values after dark is subtracted from light if it is less than 0?
Is it equal to 0 or is the black level shifted to the minimum value?
Can you add the ability to offset the black level to make it gray?