View Single Post
  #14  
Old 22-09-2019, 11:32 AM
Merlin66's Avatar
Merlin66 (Ken)
Spectroscopy Wizard

Merlin66 is online now
 
Join Date: Oct 2005
Location: St Leonards, Vic
Posts: 7,489
Dunk,
I think in the real world we always work with images which have been debayered.
The algorithm used can make a big difference to the outcome.
The bilinear method gives a lower resolution when compared with the more sophisticated VNG (variable number of gradients) model.

Dr. Craig Stark summary:

Thus, your 8 megapixel DSLR
has 8 million pixels, but only 4 million green pixels and only 2 million red and 2 million blue pixels.
This has led to the belief that the resolution of such images is far below that of a monochrome camera and that the quality is necessarily much lower as a result of this Bayer matrix and the debayering process.
While encoding the image into a Bayer matrix and reconstructing it does involve interpolation and can be done in ways that are horribly inaccurate, the loss need not be severe.

Full paper is here: http://www.stark-labs.com/craig/reso...yering_API.pdf
Reply With Quote