ISO 12641-2:2019 グラフィックテクノロジー—プリプレスデジタルデータ交換—パート2：入力スキャナーキャリブレーション用の高度なカラーターゲット | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 130, Graphic technology.

This first edition, together with ISO 12641-1:2016, cancels and replaces ISO 12641:1997, which has been technically revised.

A list of all parts in the ISO 12641 series can be found on the ISO website.

Introduction

More than 1 000 000 targets, both transmissive and reflective, have been produced based on ISO 12641 and used in the past decades for calibrating scanners.

Based on the demands for higher quality from scientific institutions, museums, art and cultural heritage archives, and special public administration applications for ID-documents, a need was recognized to achieve a better scanner colour characterization. Very dark patches (chromatic and achromatic) are nearly unrepresented by the target layout of ISO 12641-1. Advanced target designs require more patches for an enhanced sampling of saturated and pastel colours (especially for archiving applications). They offer chances for improving the analysis of non-linear scanner performance. Such modern or advanced targets however could not be based on any ISO standard, which results in a lack of standardization.

In order to keep consistency and compatibility with the existing legacy targets, ISO 12641 was made as a multipart standard where ISO 12641-1 remains unchanged from the 1997 edition and the new ISO 12641- 2 specifies the requirements for advanced targets.

The discussion revealed that a new standard should also provide a flexible framework for new targets to come. Combining this with the need to reflect modern available targets, this document provides general requirements in the main part and provides exemplary transmissive and reflective targets in the informative Annexes A and B, respectively. Self-emissive targets are covered by this document if they are designed to simulate the targets using transmission of light through an optical filter.

Traditionally, data has been provided in ACSII format using a keyword file. This document however requires the usage of the modern exchange format CxF/X‐2.

Traditionally, ISO 12641-1 has been aimed at the colour characterization of input scanning devices. This document continues that tradition but also provides the framework for targets for other input processes such as digital cameras or for quality assurance applications.

1 Scope

This document defines a framework for advanced reflective and transmissive layouts and colorimetric values of targets for use in the calibration and characterization of image capturing devices.

This document defines a framework for target creation and data reporting. This framework can be used for both ISO defined and custom targets for both reflective and transmissive use.

Self-emissive targets are not covered by this document.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 12637-1 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography