Sunday, May 24, 2020
HDR Pixels Review and Comparison
Dana Diezemann published her presentation "High Dynamic Range Imaging, A short summary" at Image Sensors Europe held in London in March 2020. Few slides from the presentation:
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I would like to give a little bit more explanation on my MAGIC log pixel from my research work at Institut National des Telecom (spin-off NIT):
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2. There is NO traditional image lag since each readout is followed by a hard reset. But there is a motion blur in the dark area of the scene due to the reason explained at 1).
The key invention of MAGIC pixel is that it proposes a hard reset to a "correct" dark reference giving the possibility to realize on-chip FPN noise compensation. In practice the silicon photodiode in this case gives negligible FPN with a highly linear SF. And this hard reset removes also the conventional Log pixel lag. But the illumination dependent motion blur remains still a problem and needs more investigation.
There is still a large room of innovation on logarithmic pixel which can be a very useful pixel design for 3D vision chip in the near future.
-Yang NI
It didn't seem to cover Sony's DOL-HDR and Quad Bayer HDR.
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