- CLF Implementation Virtual Working Group
- (ARCHIVED - This group is no longer active. This page remains here for reference only.)
- Document Workspace
- Goals
- Anticipated Deliverable(s)
- Documents
- CLF Implementation Guide
- Current CLF Specification
- Specification Revision VWG
- Implementations
- Group Proposal/VWG Charter
- Proposed list of test CLF files
- Proposed reference target
- List of LUT Formats
- CLF Repository
- CLF schema (.xsd)
- Preliminary example of a half float test for the Finishing Tier
- Preliminary example of a half float test for the Preview Tier
- LUT Box Capability Matrix
- Processed Reference Images Deliverable
- Past Meetings
- Tuesday, November 9th, 2021, 3pm Pacific Time
- Thursday, October 28th, 2021, 3pm Pacific Time
- Tuesday, October 26th, 2021, 3pm Pacific Time
- Tuesday, October 12th, 2021, 3pm Pacific Time
- Tuesday, September 14th, 2021, 3pm Pacific Time
- Tuesday, August 31st, 2021, 3pm Pacific Time
- Tuesday, August 17th, 2021, 3pm Pacific Time
- Tuesday, July 20th, 2021, 3pm Pacific Time
- Tuesday, July 6th, 2021, 3pm Pacific Time
- Tuesday, June 22nd, 2021, 3pm Pacific Time
- Tuesday, June 8th, 2021, 3pm Pacific Time
- Tuesday, May 25th, 2021, 3pm Pacific Time
- Tuesday, May 11th, 2021, 3pm Pacific Time
- Tuesday, April 27th, 2021, 3pm Pacific Time
- Tuesday, April 13th, 2021, 3pm Pacific Time
- Tuesday, March 30th, 2021, 3pm PDT
- Tuesday, March 16th, 2021, 3pm PDT
- Tuesday, February 16th, 2021, 3pm PST
- Tuesday, February 2nd, 2021, 3pm PST
- Tuesday, January 12th, 2021, 3pm PST
- Tuesday, December 15th, 2020, 3pm PST
- Tuesday, December 1st, 2020, 3pm PST
- Tuesday, November 17th, 2020, 3pm PST
- Tuesday, November 3rd, 2020, 3pm PST
- Tuesday, October 20th, 2020, 3pm PDT
- Tuesday, October 6th, 2020, 3pm PDT
- Tuesday, September 22nd, 2020, 3pm PDT
- Tuesday, September 8th, 2020, 3pm PDT
- Tuesday, August 25th, 2020, 3pm PDT
- Tuesday, July 28th, 2020, 3pm PDT
- Tuesday, July 14th, 2020, 3pm PDT
- June 30th, 2020, 3pm PDT
- June 16th, 2020, 3pm PDT
- May 19th, 2020, 3pm PDT
- May 5th, 2020, 3pm PDT
- April 21st, 2020, 1pm PDT
- April 7th 2020, 1pm PDT
- March 24th, 2020, 1pm PDT
- March 10th, 2020, 1pm PDT
- February 25th, 2020, 1pm PST
- February 4th, 2020, 1pm PST
- January 21st, 2020, 1pm PST
- January 10th, 2020, 1pm-2pm PST
- Group Norms
- How the ACES VWG Process Works
(ARCHIVED - This group is no longer active. This page remains here for reference only.)
Document Workspace
Goals
Anticipated Deliverable(s)
Documents
CLF Implementation Guide
Current CLF Specification
Specification Revision VWG
Implementations
Group Proposal/VWG Charter
Proposed list of test CLF files
Proposed reference target
List of LUT Formats
CLF Repository
CLF schema (.xsd)
Preliminary example of a half float test for the Finishing Tier
Preliminary example of a half float test for the Preview Tier
LUT Box Capability Matrix
Processed Reference Images Deliverable
Past Meetings
Tuesday, November 9th, 2021, 3pm Pacific Time
Thursday, October 28th, 2021, 3pm Pacific Time
Tuesday, October 26th, 2021, 3pm Pacific Time
Tuesday, October 12th, 2021, 3pm Pacific Time
Action item to Doug to resolve all outstanding issues in the Implementation Guide prior to the next meeting.Action item to all VWG members to block some time on the 25th or 26th to review where the Implementation Guide is at that point and be prepared to vote at the next meeting on whether to send it out for review.Tuesday, September 14th, 2021, 3pm Pacific Time
Tuesday, August 31st, 2021, 3pm Pacific Time
Tuesday, August 17th, 2021, 3pm Pacific Time
Action item to Alex Fry to update the target.Tuesday, July 20th, 2021, 3pm Pacific Time
Doug will update Preview Tier in Guide with error metric and oiiotool commandTuesday, July 6th, 2021, 3pm Pacific Time
Doug will make a PR with the discussed changes to parameter values in the CLF test suiteDoug will remove the lut3by1d_nan_infinity_example.clf example from the test suite.Tuesday, June 22nd, 2021, 3pm Pacific Time
Tuesday, June 8th, 2021, 3pm Pacific Time
Chris will post an update onhis ACESCentral threadabout using oiiotoolTuesday, May 25th, 2021, 3pm Pacific Time
Determine process for generating 10-bit DPX preview tier test imageConsider oiiotool instead of idiff for applying difference metricTuesday, May 11th, 2021, 3pm Pacific Time
Scott to fix error in S-2014-006 where ProcessList Description element was listed as required when it should be optional.Fixed on Github and in published PDFNick to advise on sufficient negative coverage bound.Josh to check idiff for region-of-interest optionDoug to add preview tier 3d-LUT to OCIO test setTuesday, April 27th, 2021, 3pm Pacific Time
Tuesday, April 13th, 2021, 3pm Pacific Time
Tuesday, March 30th, 2021, 3pm PDT
Tuesday, March 16th, 2021, 3pm PDT
Tuesday, February 16th, 2021, 3pm PST
Tuesday, February 2nd, 2021, 3pm PST
Tuesday, January 12th, 2021, 3pm PST
Tuesday, December 15th, 2020, 3pm PST
Tuesday, December 1st, 2020, 3pm PST
Tuesday, November 17th, 2020, 3pm PST
Tuesday, November 3rd, 2020, 3pm PST
Scott to follow up with Bill F. about CLF compression concerns.Nov. 12: Emailed Bill. Nov 17: Reply received.Tuesday, October 20th, 2020, 3pm PDT
Scott will stage an update on the CLF spec to change coloring of examples to avoid blue, which is used in the overview diagram.11/3: Changes pushed to ‘hotfixes’ branch (PDF not yet updated)Tuesday, October 6th, 2020, 3pm PDT
Nick presented his analysis of the error in his Colab notebook. He will add some more tests based on conversation today.Chris will use ociochecklut to validate example CLFs being provided in Implementation Guide.Scott will pull schema from specification document and add to source control so that those interested can use it.Schema added to Scott’s forkTuesday, September 22nd, 2020, 3pm PDT
Josh to check on Teradek interpolation.Tuesday, September 8th, 2020, 3pm PDT
Scott will copy Nick’s table of LUT box capabilities to DropBox(done: see above).Tuesday, August 25th, 2020, 3pm PDT
Scott will create 2 new example CLFs for JZ. One will go from ACES2065-1, apply a matrix & log node to ACEScct, modify using a CDL node, then use a 3D lut to convert ACEScct to Rec709 code values through the ACES Rec.709 Output Transform(finishingtier). The other will replace Doug’s example from last meeting and apply CDL and 3D LUT to Rec. 709 only(previewtier).These are uploaded above and explained in this forum post.Scott will incorporate Alex’s work on documenting the reference image into the Implentation Guide. *(update 9/8) Alex updated his documentation of the reference image with more details and images.Tuesday, July 28th, 2020, 3pm PDT
For the Preview Tier, Doug will add instructions for how to do a“naivebake” of an arbitrary CLF into a CLF that is just a simple Lut3D.Each of these will have a custom tolerance that is chosen based on the distance of the baked CLF from the original CLF.Doug will upload a processed integer version of Alex’s target along with a CLF and processed result as an example of a Preview Tier test.These are uploaded above.Nick will work on a capability chart for the hardware LUT boxes of interestTuesday, July 14th, 2020, 3pm PDT
Alex will provide a first draft describing the target sections for the implementation guideDoug will add tolerance proposal from ACESCentral to the implementation guideNick will start thinking about reasonable tests for hardware implementationsJune 30th, 2020, 3pm PDT
June 16th, 2020, 3pm PDT
Alex Fry to update test target based on feedback:(addNick’s hue ramp, move Inf/NaN values to first row to more easily exclude them, reduce precision of some ramps, add Macbeth patches in ACES2065-1 colorspace, make patch ramps horizontal so they read better on waveform monitors, make patch ramps centered around 2^-2.5 and in half/quarter(?) stop increments,make the gridsuse 65 so there is a center point - if feasible, etc.)Josh/Doug to investigate adding an option to OpenImageIO idiff that will implement our metricMay 19th, 2020, 3pm PDT
Scott to fix CDL style contradiction in specNick to send Alex hue target suggestion(andgroup, please post/send any other ideas)Group to investigate how their favorite image comparison tools handle Inf/NaN valuesMay 5th, 2020, 3pm PDT
Alex Fry to look at updating test target based on discussionDoug to contact Josh about CDL issue discovered in specApril 21st, 2020, 1pm PDT
Scott to fix example 11 in Exponent Node section of S-2014-006 -[thedocument has been updated based onthis post]Scott to create and share a Google Doc as a start for an Implementor’s Guide[linkshared above under“Documents”]Scott to check with Steve T. about status of VWG calendar and ability for VWG participants to subscribe to future meetings -[infoabout how to do this wasposted to ACESCentral community]Scott to follow up with ACES Leadership re: revising the Academy document naming scheme to exclude the year and then renaming S-2014-006 -[thiswas mentioned to ACES Leadership and is now on“thelist”]Doug to check with Alex Fry about potentially moving next meeting a bit later.Alex Fry/Scott/JD to work on and propose a reference image.[Alexproposed a first targetfor group reaction]April 7th 2020, 1pm PDT
March 24th, 2020, 1pm PDT
Doug will post a strawman proposal for processing tolerances to ACESCentral.Doug will start a sub-group to develop a test target, posting requirements to ACESCentral.March 10th, 2020, 1pm PDT
Doug will send OpenColorIO install/build instructions.Josh/Scott: Discuss tools for comparing images. Is there something we could leverage from past work at the Academy?February 25th, 2020, 1pm PST
February 4th, 2020, 1pm PST
January 21st, 2020, 1pm PST
January 10th, 2020, 1pm-2pm PST
We want to get as much participation as possible from product partners and other likely implementers. Action Item: Steve/JZ/Doug to organize an invite email(Done:Sent on Jan 14). Please encourage vendors you know to participate!Group Norms
How the ACES VWG Process Works