[Color on the web] 20201119 Meeting notes + next meeting logistics

Good morning/evening,

Thanks for attending our organizational meeting. My notes are below.

PLEASE JOIN the Color-on-the-web CG at [1] if you have not already done so:

[1] https://www.w3.org/community/colorweb/

Future meetings, including telecon coordinates, will be sent to that
CG's private reflector.

Our next meeting is scheduled for 1 hour on December 8 at UTC 0600.

Current agenda topics include:
  - technology demos (Ken Russell and Adam Argyle)
  - update on the upcoming W3C color workshop

Best,

-- Pierre


Color on the web organizational meeting on 20201119 -- notes
============================================================

- attendees: Adam Argyle, Colin Bendell, Chris Blume, Rafael Cintron,
Francois Daoust, Franco Ghilardi, Tatsuya Igarashi, Pierre-Anthony
Lemieux, Chris Lilley, Marc Mahy, Cheten Nanda, Chris Needham, Ken
Russell, Chris Seeger, John Simmons, Yasser Syed, Andreas Tai, Masaru
Takechi, Simon Thompson, Mark Watson

- next meeting: December 8 at UTC 0600

- objective: Create a forum for discussing W3C activities related to
color in general, and HDR/WCG in particular

- the plan is to host the discussion under Color CG
(https://www.w3.org/community/colorweb/)
  - desire to make it possible for non-W3C experts to follow the work
  - AI: Chris Lilley to look into whether the CG has/needs a formal charter
  - AI: Everyone to review CG participation requirements and
communicate concerns to Chris Lilley (chris@w3.org) and Pierre-Anthony
Lemieux (pal@sandflow.com)
  - AI: Chris Lilley and Pierre-Anthony Lemieux to look at member-only
reflector for CG

- meetings will be held on second Tuesday of every month
  - alternating 1-hour timeslots: UTC 0600 and UTC 2100
  - adjust depending on workload and participant

- initial agenda for first meeting
  - technology demos (Ken Russell and Adam Argyle)
    - https://codepen.io/argyleink/pen/MWymQGj
    - https://codepen.io/argyleink/pen/oNxeWbz
  - update on upcoming color workshop
(https://www.w3.org/Graphics/Color/Workshop/) (Chris Lilley)

- potential recurring topics
  - ensure that the imperative rendering APIs - into Canvas and
OffscreenCanvas - can access applications' desired color spaces and
bit depths (https://github.com/WICG/canvas-color-space)

  - ensure that the web's specified color space primitives map well to
the capabilities of graphics hardware, e.g. WebGL/WebGPU can handle
with HDR/WCG efficiently (e.g. shadow blur)

  - integrate in WPT whenever possible (matching CSS/canvas output)
    - the integration of WebGPU tests with WPT is not effective for
now: the WebGPU test suite being developed in a separate repo for now
(https://github.com/gpuweb/cts)

  - check if a device or a device and an attached screen can decode
and display high dynamic range (HDR) video and stills formats
    - offer UHD/HDR if available/detected
    - media query for gamut
    - media query for dynamic range
    - target TV, PC monitors, mobile
    - challenge with devices that use multiple planes
      - media query so that the graphics plane can match the video plane

  - display HDR video and render graphical or text overlays to an
appropriate colour and luminance level, e.g. subtitles with an sRGB
colour value of FFFFFF should be rendered at the HDR Graphics White
(see ITU-R BT.2408 Table 1)

  - display pages to viewers which incorporate one or more HDR stills
and/or videos plus text, graphics and standard dynamic range stills
and/or images e.g. an on demand video service search page.

  - reference sources/best practice/examples of HDR images/video being
inserted in web pages/applications

  - incorporate objective metrics in testing
    - DeltaE200 and DeltaITP
    - https://colorjs.io/

  - report on other activities
    - Media WG (Mark Watson)
      - media capabilities discussions
    - CSS (Lilley)
    - MEIG (Needham)
    - TTWG (PAL)
    - WICG (Ken Russell)
      - Canvas/WebGPU
      - Client hints
    - Color CG (Lilley)
    - ICC Display & HDR (Lilley)
    - GPU for the web (Ken Russell)

Received on Wednesday, 25 November 2020 04:58:22 UTC