ISO/TR 17321-5:2021 PDF

Name: ISO/TR 17321-5:2021 — Graphic technology and photography — Colour characterization of digital still cameras (DSCs) — Part 5: Colour targets including saturated colours for colour characteristic evaluation test for colorimetric image capture
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Graphic technology and photography — Colour characterization of digital still cameras (DSCs) — Part 5: Colour targets including saturated colours for colour characteristic evaluation test for colorimetric image capture

Название (английский):

ISO/TR 17321-5:2021

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 35
Дата публикации:: 14 января 2021 г.
Издание:: ISO TR 17321 edition 1 version 1
ICS:: 37.040.10

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Описание (английский):

This document describes sample methods to generate spectra for colour targets comprised of highly saturated colours for colour characteristic evaluation of colorimetric image capture capability of digital still cameras (DSCs).

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO/TR 17321-5:2021 - "Graphic technology and photography - Colour characterization of digital still cameras (DSCs) - Part 5" describes sample methods to generate colour targets including highly saturated colours for evaluating the colorimetric image-capture capability of digital still cameras (DSCs). The technical report provides procedural approaches and example datasets to produce spectral distributions that stress camera spectral responses, helping assess how closely a camera’s overall sensor spectral sensitivities (OSSS) approximate colour-matching functions for accurate colour reproduction.

Key technical topics and requirements

Two target-generation methods

Eigenvector extension of real spectra: statistical extension and spectral reconstruction using eigenvectors computed from a selected spectral database. Includes procedures for generating boundary colours and highly saturated approximations constrained by chroma, hue and smoothness.
Artificial LED‑based spectra: selection and synthesis of spectra whose wavelength peaks coincide with colour-difference-sensitive wavelengths (CDSW) to reveal camera sensitivity gaps.

Spectral sampling guidance: aligns with the ISO 17321 series (e.g., spectral range typically 380–730 nm with ≤10 nm sampling) for dataset selection and reconstruction.

Evaluation of OSSS: introduces a figure-of-merit (FOM) framework and compares evaluation metrics (e.g., Vora’s μ‑factor, Sharma’s FOM, ΔE-based approaches), discusses advantages/disadvantages, and provides worked examples showing how 17321-5 datasets can be used for camera assessment.

Supporting materials: informative annexes with eigenvector selection, boundary-gamut analysis, worked examples (e.g., Pointer’s surface colours), CDSW definitions, target spectral datasets and downloadable spectral distributions.

Practical applications and who should use this standard

ISO/TR 17321-5 is practical for professionals who need rigorous, colorimetric camera evaluation:

Camera and sensor manufacturers - to optimize filter and sensor designs and validate colorimetric capture performance.

Color scientists and imaging labs - for laboratory evaluation, FOM calculations and research into spectral sensitivity.

Digital imaging integrators - for validating color accuracy in applications such as medical imaging, cosmetics imaging, e‑commerce, catalogue photography, fine-art reproduction and archiving.

Test-lab and QA engineers - to develop test charts and LED-based targets that expose colour-difference weaknesses in imaging pipelines.

Related standards and resources

Part of the ISO 17321 series on colour characterization of DSCs. See ISO 17321-1 for spectral sampling recommendations and the ISO website for related parts.

Annex H of ISO/TR 17321-5 provides downloadable spectral distribution datasets for immediate use in evaluation and FOM calculations.

Keywords: ISO/TR 17321-5:2021, colour characterization, digital still cameras, DSCs, colour targets, saturated colours, CDSW, eigenvector spectral reconstruction, OSSS, camera FOM, colorimetric image capture.

ISO/TR 17321-5:2021 PDF

Abstract

Похожие стандарты

Overview

Key technical topics and requirements

Practical applications and who should use this standard

Related standards and resources

Технические детали

SIST ISO 17321-1:2014

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