Leonardo Boher
pro member
Hi,
I know what's demosaising and color depth, bayer filter, sensors, ACD, S/N and most of the technical stuff, but I have a question and hope some grinner could drop some help since I could'nt obtain an answer by browsing the Internet.
I'm starting to think that (will put a 9mp sensor as something figurative):
1) A 9mp sensor has a Bayer Filter before of it.
2) This Bayer Filter, filters the respective color that belongs to each filter's color.
3) We have then, the mosaising.
4) So, the true color is just 1/3 per mosaic, the others are generated by interpolation by the ADC.
Conclusions (self deduction):
1) Each color is fragmented in mosaics.
2) The sensor is divided by these mosaics which are 3 (RGB).
3) So, a 9mp sensor has 3mp per mosaic.
4) When demosaising occurs, we have the composition, which is the sum of the 3 mosaics RGB and, in consecuence, the 9mp of the sensor, fully covered. (Sounds like a Gif file or Indexed files).
I'm starting to think that a demosaised RAW of any bits has 1/3 of the whole tonal values. For example, a 12 bits RAW File, which has 4.096 tonal values in total (I assume after demosaising) has 1365.33 tonal values per each channel, depicting the color interpolation.
But I have a doubt, because a JPEG (256 tonal values per channel) will have, in this statement, 85.33 tonal values per mosaic...
Suppose we have a 12 bit file.
This file has 12 bits (4.096 possible tonal values) per mosaic? or just in the whole composition, the sum of the 3 mosaics, and just in the demosaising we achieve those 4.096 possible tonal values?
I'm asking this because I cannot find in Google if those 4.096 possible tonal values are per mosaic or they become that amount in the demosaising process.
Thanks in advance. I will appreciate a lot some light in this matter
Leo
I know what's demosaising and color depth, bayer filter, sensors, ACD, S/N and most of the technical stuff, but I have a question and hope some grinner could drop some help since I could'nt obtain an answer by browsing the Internet.
I'm starting to think that (will put a 9mp sensor as something figurative):
1) A 9mp sensor has a Bayer Filter before of it.
2) This Bayer Filter, filters the respective color that belongs to each filter's color.
3) We have then, the mosaising.
4) So, the true color is just 1/3 per mosaic, the others are generated by interpolation by the ADC.
Conclusions (self deduction):
1) Each color is fragmented in mosaics.
2) The sensor is divided by these mosaics which are 3 (RGB).
3) So, a 9mp sensor has 3mp per mosaic.
4) When demosaising occurs, we have the composition, which is the sum of the 3 mosaics RGB and, in consecuence, the 9mp of the sensor, fully covered. (Sounds like a Gif file or Indexed files).
I'm starting to think that a demosaised RAW of any bits has 1/3 of the whole tonal values. For example, a 12 bits RAW File, which has 4.096 tonal values in total (I assume after demosaising) has 1365.33 tonal values per each channel, depicting the color interpolation.
But I have a doubt, because a JPEG (256 tonal values per channel) will have, in this statement, 85.33 tonal values per mosaic...
Suppose we have a 12 bit file.
This file has 12 bits (4.096 possible tonal values) per mosaic? or just in the whole composition, the sum of the 3 mosaics, and just in the demosaising we achieve those 4.096 possible tonal values?
I'm asking this because I cannot find in Google if those 4.096 possible tonal values are per mosaic or they become that amount in the demosaising process.
Thanks in advance. I will appreciate a lot some light in this matter
Leo