Відео

Such a brilliant mind!

Are there any books or notable references out there that I can read to get a better idea of what the various image quality metrics are and how they are typically allied? I feel like I just jumped into the middle of a conversion without any context haha

Gamma explanation is lacking. From Wikipedia: "gamma encoding was developed originally to compensate for the brightness characteristics of cathode ray tube (CRT) displays, that is not its main purpose or advantage in modern systems". In the present without CRTs: "Gamma encoding of images is used to optimize the usage of bits when encoding an image, or bandwidth used to transport an image", i.e. the bit budget is better optimized for higher perceived visual quality e.g. considering compression artefacts

This is wrong about RCCB. In Aptina's ClarityPlus technology, which really used a high-transmissivity Y due to not great inter-pixel isolation, we got about a 2-3dB improvement in SNR. The trick Wayne Prentice is missing, is that the noise between color channels is not completely uncorrelated, allowing you to use the C signal to denoise the neighboring R and B. The color reproduction was shown to be at least as good as a conventional Bayer sensor, both by analysis and in real-world tests. There were issues that blocked wide scale adoption. One is the non-standard processing, and need for the inter-channel denoise, that made the sensor unsuitable for use with standard phone APs unless an additional pre-processor was used. The other was increased anomalous optical crosstalk through the C pixel for light outside the acceptance angle of the microlens. This led to strong purple coloration in off-angle stray light (certain ghosts originating towards the end of the optical path).

Considering the Barten Curve om HDR standards like PQ2084; Its show in the definition that 12bit codewords would be "needed" to sample PQ targeting 10k nits level. By hardware perspective using ARGB 2:10:10:10 format would optimize both storage and compute. Then what is the better way to maintain information but compress it to 10bit? my estimation is abandoning limited code ranges so a 10bit full-range format could be enough but some adjustment of PQ max target like reducing from 10k nits to 8k.

What happened to the audio it’s delayed and out of sync. Really great presentation but that made it difficult to follow along.

Thanks once again!

This was a great watch, thanks for uploading this. I graduated from RIT last year and miss my imaging science classes. Felt at home.

Wayne Prentice is one of the giants I mentioned, quoted in his comment around the 1:00 mark. Looking forward to listening to my old friend and colleague. Thanks Wayne and Peter and Bruce!

Patrick, this is a terrific talk, what a tremendous amount of knowledge you're sharing - I'm on my second listen. I'm starting with a 4" telescope, DSLR and Photoshop and have now taken it out in the Utah desert twice. Still have a lot of learning to do, especially on dedicated astro cameras, narrowband filters and processing. Thanks for sharing this!

Full of myths, bad research, and a questionable methodology for archiving videos.