ISO/IEC 24790:2017
Information technology — Office equipment — Measurement of image quality attributes for hardcopy output — Monochrome text and graphic images
ISO/IEC 24790:2017 specifies device-independent image quality attributes, measurement methods and analytical procedures to describe the quality of output images from hardcopy devices. This document is applicable to human-readable monochrome documents produced from printers and copiers.
The attributes, methods and procedures rely on measurable properties of printed text and graphic images. Special targets or reference images are not required, but image elements are useful for adequate measurements only if they meet some minimal requirements, e.g. on size or number present. This document is not applicable to images on media other than hardcopy (e.g. images on a visual display) or to images that are intended to be machine readable only (e.g. bar codes).
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Report of results and sampling scheme
4.1 Report of results
4.1.1 Test identification information
4.1.2 Instrument system
4.1.3 Conformance
4.1.4 Sampling scheme
4.1.5 Results
4.2 Sampling of pages
4.3 Sampling of images
4.3.1 General
4.3.2 Discretionary sampling
4.3.3 Random sampling
4.3.4 Whole page sampling
5 Attributes and their measures
5.1 Schema of attributes
5.2 Large area graphic image quality attributes
5.2.1 General
5.2.2 Large area Rmax and Rmin
5.2.3 Large area darkness
5.2.4 Background darkness
5.2.5 Graininess
5.2.6 Mottle
5.2.7 Background extraneous mark
5.2.8 Large area void
5.2.9 Banding
5.3 Character and line image quality attributes
5.3.1 General
5.3.2 Character and line image Rmax and Rmin
5.3.3 Line width
5.3.4 Character darkness
5.3.5 Blurriness
5.3.6 Raggedness
5.3.7 Character void
5.3.8 Character surround area extraneous mark
5.3.9 Character surround area haze
6 System conformance
6.1 Conformance standard
6.2 Instrument
6.2.1 OECF conversion
6.2.2 MTF compensation
6.3 Test objects
6.3.1 Specification for production of lines
6.3.2 Specification for production of large images
6.3.3 Slanted edge pattern
6.4 Goal values
Annex A (normative) Bitmaps for conformance test lines
Annex B (informative) How to use this document
Annex C (normative) Layout of test images for system conformance test
Annex D (informative) Method to determine Rmax, Rmin and ROI
Annex E (informative) Development of system conformance test chart
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Report of results and sampling scheme
4.1 Report of results
4.1.1 Test identification information
4.1.2 Instrument system
4.1.3 Conformance
4.1.4 Sampling scheme
4.1.5 Results
4.2 Sampling of pages
4.3 Sampling of images
4.3.1 General
4.3.2 Discretionary sampling
4.3.3 Random sampling
4.3.4 Whole page sampling
5 Attributes and their measures
5.1 Schema of attributes
5.2 Large area graphic image quality attributes
5.2.1 General
5.2.2 Large area Rmax and Rmin
5.2.3 Large area darkness
5.2.4 Background darkness
5.2.5 Graininess
5.2.6 Mottle
5.2.7 Background extraneous mark
5.2.8 Large area void
5.2.9 Banding
5.3 Character and line image quality attributes
5.3.1 General
5.3.2 Character and line image Rmax and Rmin
5.3.3 Line width
5.3.4 Character darkness
5.3.5 Blurriness
5.3.6 Raggedness
5.3.7 Character void
5.3.8 Character surround area extraneous mark
5.3.9 Character surround area haze
6 System conformance
6.1 Conformance standard
6.2 Instrument
6.2.1 OECF conversion
6.2.2 MTF compensation
6.3 Test objects
6.3.1 Specification for production of lines
6.3.2 Specification for production of large images
6.3.3 Slanted edge pattern
6.4 Goal values
Annex A (normative) Bitmaps for conformance test lines
Annex B (informative) How to use this document
Annex C (normative) Layout of test images for system conformance test
Annex D (informative) Method to determine Rmax, Rmin and ROI
Annex E (informative) Development of system conformance test chart
Bibliography