Is there a way to know it DSLR is 12 or 14bits

Submitted by lock on

Hello, is there a way in data structure to know if raw data are 12 or 14 bits depth ?

Cheers,

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Could you please explain 12

Submitted by lexa on

Could you please explain 12 vs 14 bit difference for Sony cRAW format:

1) Data stored in 8-bit per pixel overall (16-pixel blocks, 11-bit base value, 7-bit deltas)
2) After decompression: 11 bit non-linear data
3) After linearization curve applied: ??bit data with data range 0...~17000

File format is the same for 12-bit ADC cameras (e.g. A700), real 14-bit ADC (e.g. Sony A7r) and 14-bit ADC in 12-bit mode (A7R in electronic shutter mode).

-- Alex Tutubalin @LibRaw LLC

OK, sorry for this dummy

Submitted by lock on

OK, sorry for this dummy question indeed.
So my question is now how libraw know the constant factor to apply to normalize to 16bits ?
Sorry if it is a dummy question again.

imgdata.color.maximum

Submitted by lexa on

imgdata.color.maximum variable holds maximum data range (this value is not black-level-subtracted)

-- Alex Tutubalin @LibRaw LLC

Thank you

Submitted by lock on

Thanks a lot, that was what I was looking for.
Many thanks