Javier_Covancho Everywhere it says that the ASI 533 MC uses the Bayer RGGB pattern but I don't know why only the GBRG has worked for me.
Thats interesting; did you happen to crop the image before sending the image to post processing?
The "RGGB" Bayer pattern is actually a repeated two dimensional structure that repeats the following 2x2 matrix:
RG
GB
I.e., four rows will look like
RGRGRGRG...
GBGBGBGB...
RGRGRGRG...
GBGBGBGB...
If you had cropped at a odd-pixel row (e.g., between first and second row above), the pattern becomes a repetition of
GB
RG
And therefore gives the "GBRG" pattern that you saw.
In fact if you cropped at both odd row and odd column, you can even get
BG
GR
or "BGGR" from a nominal RGGB sensor.
If you give the postprocessor an inverted image, it also becomes "GBRG".
The moral of the story is that "RGGB" is guaranteed for Sony cameras only if you had not cropped the pre-deBayered image. Once the "origin" of the image changes, you can get other patterns.
Chen
