I am trying to understand RAW better.
I have a Canon EOS 20D, and shoot in RAW+Jpeg mode. According to the specs in the manual, the RAWs of the 20D are 12 Bit. I understand that this means each pixel contains 36 bit of information. A Jpeg only has 3*8=24 bit of information.
In RAW+Jpeg mode, the 20D actually generates two Jpegs: one in full resolution (3504x2336), and one in down scaled resolution (1536x1024) that is embedded in the RAW file for preview purposes.
Sorry, have to post a whole battery of questions, don't know how to summarize my question, so here it goes:
How exactly are the 36 bit of the RAW mapped to the 24 bit of the full resolution Jpeg? Does it just take the 24 bit in the middle of the 36 bits, or at the beginning, at the end or what? Or is there a more sophisticated mapping going on?
Is the mapping the same for the separate full resolution Jpeg and the embedded preview Jpeg?
When I open a RAW in Raw Therapee, it again needs to be mapped down to 24 bit to be displayed at the screen. Is this again the same mapping or a different one?
Also, the RAW images always look very flat and drab, with very dim colors. (Only with Raw Therapee I can bring out a pop and vibrancy which I love from film). The fact that the RAWs and derived Jpegs always look so drab without post-processing, is this related to the bit reduction mapping, or has it different reasons?