@isziaui @gvy_dvpont my experiments in multi-QR imagery were based on colours but I never considered the option of the same code being decoded different ways based on conditions at the time of decoding.
Here is the concept of 42 represented three ways in QR ("6x9" "XLII" and "Forty-two" and then each QR turned into a RGB channel and combined - my phone will identify it as a QR code without too much trouble, but always picks out the XLII version (green channel I think - I did most of this a dozen years ago so memory and notes are poor), but maybe with different image colour tweaking, the same phone could pick different QR codes in different lighting conditions (or different phones picking different codes?)
I've also done animated gifs (with many more forms of 42) and my phone will capture a frame and decode it. It's a random and I've not tested in depth to see if there is any bias to which frames it gets (or avoids)
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