# What does Hillman's original paper contain that OpenEXR's current TheoryDeepPixels web page does not show, and are the formulas the same?

- id: art_01M5MDJTFY4RGZYQHNXG23CGVT
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T11, T12 · tags: none
- updated: 2026-10-23T13:00:41.324Z
- url: https://veyrul.com/articles/art_01M5MDJTFY4RGZYQHNXG23CGVT

The OpenEXR website's TheoryDeepPixels.rst (69b2604f, titled 'Theory of Deep Samples', SPDX BSD-3-Clause) follows the 2018 amendment of Hillman's paper at equations 6-7 (t = T^(1/n)) and keeps the derivation structure, but carries no author, organisation, date or amendment note.

The OpenEXR website's TheoryDeepPixels.rst (69b2604f, titled 'Theory of Deep Samples', SPDX BSD-3-Clause) follows the 2018 amendment of Hillman's paper at equations 6-7 (t = T^(1/n)) and keeps the derivation structure, but carries no author, organisation, date or amendment note.

Curator qualifications: Licence conflict preserved: the rst declares BSD-3-Clause for its text while the PDFs carry no licence; whether the rst licence covers Hillman's derivation is not stated. Interpreting page weights equivalence (E8, F3) and abstract title inconsistency (E9) not reinspected. Text comparison only (pdftotext and normalised diff); no rendering.

Limitations: Text comparison only (pdftotext and normalised diff); no rendering.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "http://web.archive.org/web/20221011161219id_/https://www.openexr.com/documentation/TheoryDeepPixels.pdf",
      "note": "openexr 1899a456 OpenEXR/doc/TheoryDeepPixels.pdf (lines 4, 10, 128-131); openexr 69b2604f website/TheoryDeepPixels.rst lines 1-5, 115-125, 188-193, 478-492"
    },
    {
      "url": "https://github.com/AcademySoftwareFoundation/openexr/blob/1899a456cbafb213c4a53c35eb3203296f92e503/OpenEXR/doc/TheoryDeepPixels.pdf",
      "note": "openexr 1899a456 OpenEXR/doc/TheoryDeepPixels.pdf (lines 4, 10, 128-131); openexr 69b2604f website/TheoryDeepPixels.rst lines 1-5, 115-125, 188-193, 478-492"
    },
    {
      "url": "https://github.com/AcademySoftwareFoundation/openexr/blob/69b2604fc76e370615438bdc8d2cd95b9349c12e/website/TheoryDeepPixels.rst",
      "note": "openexr 1899a456 OpenEXR/doc/TheoryDeepPixels.pdf (lines 4, 10, 128-131); openexr 69b2604f website/TheoryDeepPixels.rst lines 1-5, 115-125, 188-193, 478-492"
    },
    {
      "url": "https://github.com/AcademySoftwareFoundation/openexr/blob/69b2604fc76e370615438bdc8d2cd95b9349c12e/website/InterpretingDeepPixels.rst",
      "note": "openexr 1899a456 OpenEXR/doc/TheoryDeepPixels.pdf (lines 4, 10, 128-131); openexr 69b2604f website/TheoryDeepPixels.rst lines 1-5, 115-125, 188-193, 478-492"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] The OpenEXR website's TheoryDeepPixels.rst (69b2604f, titled 'Theory of Deep Samples', SPDX BSD-3-Clause) follows the 2018 amendment of Hillman's paper at equations 6-7 (t = T^(1/n)) and keeps the derivation structure, but carries no author, organisation, date or amendment note. · locator: openexr 1899a456 OpenEXR/doc/TheoryDeepPixels.pdf (lines 4, 10, 128-131); openexr 69b2604f website/TheoryDeepPixels.rst lines 1-5, 115-125, 188-193, 478-492 · source: http://web.archive.org/web/20221011161219id_/https://www.openexr.com/documentation/TheoryDeepPixels.pdf

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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