Hao Xie

Color Scientist. he/him

[Hao Xie @HA0X1E]

Here comes the Sun 🌞

…when the Helmholtz-Kohlrausch (H-K) effect is incorporated. A thread 🧵1/n

[Hao Xie @HA0X1E]

Using biophysically generative process (analogous to Asano’s individual CMFs), a comprehensive & physically realistic modeling, reconstructed from RGB capture, is proposed & holds huge potential for spectral rendering, imaging simulation & skin perception. Plz check out soon. 3/3

[Hao Xie @HA0X1E]

Delighted and a bit unrealistic to be on the author list of my first graphics paper, <A Hyperspectral Space of Biophysical Skin Tones for Inverse Rendering of Skin Properties>🟫

[Eurographics Symposium on Rendering @EGSympRendering]

This year, EGSR will feature 26 amazing papers. Check out the program here: https://t.co/xXdh03HHVr

[Hao Xie @HA0X1E]

Skin spectral data such as those from Leeds-Liverpool and Stanford ISET have been useful but w. some limitations in terms of spatial characterizations, diversity, etc. 2/3

[Hao Xie @HA0X1E]

@troy_s If the output is XYZ, that could be preserving the white point for equal-energy spectra.

[Peter Morovič @pezike]

The full program of @ImagingOrg #CIC30 is now online & registration is open (at a discount until Oct 16) https://t.co/2YAy74Bzyi The best part of the conference is meeting the #color and #imaging crowd from around the world. A few photos from past events to whet your appetite :)

[Hao Xie @HA0X1E]

@yzhu88 The mixing needed more stirring, but the part where the mixing happened was amazingly reasonable (the green).

[Hao Xie @HA0X1E]

I asked DALL·E 2 to imagine the blackest black, the whitest white, etc. to see its "gamut". Wondering if the result is of any possible use for wording the instructions in (human) psychophysics?

[Hao Xie @HA0X1E]

@thecolorsapp cc. @HellwigLuke

[Hao Xie @HA0X1E]

"...large color differences saturate relative to the Riemannian prediction." Nice commentary by David Brainard https://t.co/FsVuLgj4yD Seems the idea above is consistent with the law of diminishing returns for both color and money.

[Hao Xie @HA0X1E]

It looks fun to monetize color in an experiment (with fast & "accurate" decisions). As we're thinking about *large* color differences, I wonder whether the opposite (to colorize money) can help...💵💶💷

[KrajbichLab @KrajbichLab]

While Studies 1-2 used subjective ratings to measure value, Study 3 used objective values. We trained people that colors = cash. Each option was a mix of colors and each trial there was an objectively better option. Trials were simply mean-shifted across value levels. 5/10

[Hao Xie @HA0X1E]

To summarize, the H-K effect is not necessarily an undesired artifact to be compensated (most times it should). Luminance & brightness can be reconciled as they serve different purposes for both artists & scientists. See also https://t.co/awWIcZQsoS & https://t.co/gbdd7USMKs n/n

[Hao Xie @HA0X1E]

Here comes the Sun 🌞

…when the Helmholtz-Kohlrausch (H-K) effect is incorporated. A thread 🧵1/n

[Hao Xie @HA0X1E]

The vessels in the BG become less salient in my conversion (probably they should be). Color contrast needs non-trivial care when doing the 3D-to-1D mapping. See the benchmarking results where sometimes contrast polarity did not even need to be correct: https://t.co/WhTJkF7wXE 6/n

[Hao Xie @HA0X1E]

This Wednesday, I will discuss the Luther condition for individual observers at https://t.co/AHEK9JBR6Z. It was a long-hatched idea and a fun side-project.

[Hao Xie @HA0X1E]

It was hugely inspirational. I also love the stories that the prism from his mother sparked his interest in vision at 5 yo, and his kids' jellycat motivated him to switch to tactile sensors. And the remarkable checker shadow illusion was a result of two-year iterative innovation.

[西田眞也 Shin'ya Nishida @shinyanishida]

While I’m lucky one of many collaborators of Ted Adelson, and thought I knew something about Plenoptic function, I didn’t know that his idea led to the development of dual-pixel AF, the core technology for mirrorless digital cameras. He is really Da Vinci of our age. #TedFest