X-Trans is NOT Random

Started Sep 8, 2012 | Discussions thread
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Charuteiro
Charuteiro Contributing Member • Posts: 714
Re: X-Trans is NOT Random

rattymouse wrote:

This is nonsense. Anyone who looks at the X-Trans sensor can see that it is made up of a repeating/ pattern of RGB. In other worse ( sic ), if you see one unit (pixel) of the sensor, you can "draw" the whole sensor, over and over and over again. If the sensor were truly random, you would not know what the next unit would look like. The X-Trans is not at all random, it just has a different layout than the Bayer pattern.

Charuteiro wrote:
Yeah, here's the pattern:

(1) GBG/RGR/GBG/GRG/BGB/GRG

Then shift the next row to start with the (n+1) cell or grouping, e.g., (2) RGR; then start the next row with (3) GBG; then (4) GRG; then (5) BGB; then (6) GRG; then start over again with (1) GBG.

So, the array is 6 x 6 as follows:

(1) GBG/RGR/GBG/GRG/BGB/GRG
(2) RGR/GBG/GRG/BGB/GRG/GBG
(3) GBG/GRG/BGB/GRG/GBG/RGR
(4) GRG/BGB/GRG/GBG/RGR/GBG
(5) BGB/GRG/GBG/RGR/GBG/GRG
(6) GRG/GBG/RGR/GBG/GRG/BGB

Hey Ratty,

You're correct. If the order of the six RGB unit cells is known as in (1) above; and if the position of one of the six RGB unit cells is also know; then the entire matrix follows by transposition which defines the array.

So, now on to the RAF(RAW) file converter algorithm...

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