Myndex

> _Well, given the section defining the relative luminance has nothing mentioning the existence of this errata, it is quite hard to discover it (the only way to discover it...

To rephrase what Thomas (KelSolaar) said, it's simply important to stick by the standard for the particular color space. The standards for sRGB to YCbCr indicate using the 601 matrix....

Yes, it's okay to use discordant coefficients so long as you use the same ones going in as used for going out, and vice versa. **BUT:** it should be mentioned...

You would normally go from a gamma-encoded RʹGʹBʹ to YʹIQ and leave the gamma in place. Use the 601 coefficients for standard definition (720x576 and lower), and 709 for high...

Hi @joshblack Unfortunately, I can't find much additional. Trying to bring up scale: `.../scale/7b1f34cc-d9d9-4c03-84f3-208bc962b7f8` Causes the editing screen to quit, with console error: > Failed to load resource: the server...

### Where we could use help: @alexkrolick had started a pull request to get things working with Roll-up to create various builds. Unfortunately this was prior to a large number...

Contrasts under $L^c ±10$ are invalid, and fonts cut off at $L^c ±30$. I'm not sure what you mean when you say "expected value is 999" ? I think what...

Hi @jonathanpoelen I see, though for apca-w3, there are no valid values under Lc ±7. But if you are just taking the iterated output of the `fontLookupAPCA()` function, I understand...

Also just FYI, the lookups will be replaced with a pure algorithmic approach in the not too distant future. The LUTs are for developmental purposes.

OpenEXR has a collection of HDR test images that may be useful for this context. There is an assortment of patterns as well as natural images, and images intended to...