Binning

Cameras, telescopes, focusers and other hardware
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Patrick
Posts: 45
Joined: 01 Oct 2019, 01:10

Binning

Post by Patrick » 23 Nov 2025, 21:23

Hello,
My CCD camera is lmited to 1 x1 and 2 x 2 binning.
If I captue an image using the camera set at 2 x 2 while camera options Software binning is set at 3 x 3, what is the actual result?
Do I have four pixels formed into one (the 2 x 2 camera setting) with one read noise , which is then (the 3 x 3 softeare setting) comined from (in effect) 36 pixels and nine reads, or….. what?
Not necessarily for noise reduction but can someone simply explain how the use of both hardware and software binning works?
Regards,
Patrick.

TKnightKY
Posts: 21
Joined: 08 Jan 2019, 15:44

Re: Binning

Post by TKnightKY » 25 Nov 2025, 16:05

I don't know how the software will react with conflicting settings but you could test this yourself by just checking the resulting image size and compare it with the full image size for your camera sensor.

fabdev
Posts: 550
Joined: 03 Dec 2018, 21:43

Re: Binning

Post by fabdev » 26 Nov 2025, 00:25

Hello, you could test it indoor with the camera simulator:
A hardware binning of 2x2 plus a software binning 3x3 will give a 6x6 total binning.
Hardware binning comes from the camera, often from the sensor itself. Software binning is just image processing.
Fabio.

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