Aktívna norma | Vydaná: 27.03.2023

ISO/TS 18621-21:2023-ed.2.0

Graphic technology — Image quality evaluation methods for printed matter — Part 21: Measurement of 1D distortions of macroscopic uniformity utilizing scanning spectrophotometers
(Technologie graphique — Méthodes d’évaluation de la qualité d’image pour les imprimés — Partie 21: Mesure des distorsions 1D d´uniformité macroscopique a l´aide de spectrophotometres a balayage)

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Podrobné informácie

Označenie: ISO/TS 18621-21:2023-ed.2.0

Dátum vydania: 27.03.2023

Stránok: 7

Krajina: Medzinárodná technická norma

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Anotácia

Description / Abstract: This document defines a measurement method for the evaluation of distortions in the macroscopic uniformity of printed areas that are oriented in the horizontal and vertical direction, such as streaks and bands. It provides requirements for the layout of the test form, the use of a colour measurement device taking measurements in a 2D sampling grid, and the formula to compute the Macro-Uniformity-Score. This document does not cover any non-adjacent or non-horizontal nor vertical patterns. Due to the used spatial frequency, the Macro-Uniformity-Score does not measure high frequency (fine) patterns such as missing nozzles.

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