Calibrated projecti...
 
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Calibrated projective: pixel size and resizing  

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(@ralph)
Main Sequence Star Customer
Joined: 6 months ago
Posts: 25
October 19, 2019 23:10  

A few quick questions.

Calibrated projective requires the focal length and pixel size to be specified. Which focal length and/or pixel size should be used in the following cases:

  1. Super pixel for a colour filter array, detector pixel size or double the pixel size?
  2. A resized image, detector pixel size or original pixel size divided by the resizing scale?
  3. A combination of different processing levels with some resized intermediate results?
  4. A combination of multiple optics with different focal lengths?

Thanks.


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(@mabula-admin)
Quasar Admin
Joined: 3 years ago
Posts: 2160
October 20, 2019 01:03  

Hi Ralph @ralph,

You want to specify the the focal lenght and pixel size of the reference frame with the chosen debayer algorithm (if you chose super pixel, yes, increase with factor 2, if not use the pixel size of your sensor !).

But it is not that critical as well, these 2 values merely serve as starting points for calculations. In most cases, if you supply bad values, the result will still converge to the correct settings.

Kind regards,

Mabula

Main developer of Astro Pixel Processor and owner of Aries Productions


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