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INDI Library v2.0.6 is Released (02 Feb 2024)

Bi-monthly release with minor bug fixes and improvements

Bit per pixel Canon 1000D and 450D

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Hi ,

I noticed that the bit per pixel is 16 into the fits viewer and it is impossible to set up to 12 into the Indi panel.

Best regards
4 years 6 months ago #43478

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Hi,

The Canon hardware produces 12 bit images which internally get scaled up to 16 bit which then get downloaded to your computer. In image processing images are either 8 bit, 16 bit or 32 bit. Even 24 bit images really are 32 bit.


HTH, Wouter
4 years 6 months ago #43483

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Is it a truth 16 bits or 12 bits converted to 16 bits ?
Last edit: 4 years 6 months ago by MORELLI.
4 years 6 months ago #43512

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Like I wrote in my previous comment: 12 bit data converted to a 16 bit image.
4 years 6 months ago #43515

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I do capture of 20 s to obtain a saturated flat. The fits viewer image statistic gives a maximum value of 15876 for the 450D and 3658 for the 1000D. What can you infer ?
4 years 6 months ago #43615

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To me it implies that the images don't get scaled up in the camera (at least it shouldn't if they are in RAW format as I understand) but that they come out as 12 bit images from the 1000D and 14 bit from the 450D, 2 to the power of 12 being 4096 and to the power of 14 being 16384. I think any scaling is then done on the software on the computer - for instance, in CCDCiel, my 100D (14 bit) only shows pixel values up to around 16000, whereas the same camera hooked up to SGPro has saturated pixels at around 65000, i.e., it has been scaled to 16 bit at least for the display.
Equipment:
EQ6R-Pro with SW 190MN, ATIK 383L+ and ATIK EFW2, guiding with QHY5LII-M on an Orion GuideScope (run from a PC in the observatory running SGPro)
EQ6R with SW 150PDS, Canon 100D (astro mod), guiding with with QHY5LII-M on an Orion GuideScope (run from a TinkerBoard S)

Terry
4 years 6 months ago #43647

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