PD ISO/TS 18621-21:2020 PDF
Graphic technology. Image quality evaluation methods for printed matter - Measurement of 1D distortions of macroscopic uniformity utilizing scanning spectrophotometers
Graphic technology. Image quality evaluation methods for printed matter - Measurement of 1D distortions of macroscopic uniformity utilizing scanning spectrophotometers
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Дата публикации:
- 31 декабря 2020 г.
- ICS:
- 37.100.10
- SKU:
- PD ISO/TS 18621-21:2020
Abstract
What is ISO/TS 18621-21:2020 about?
ISO/TS 1862121 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. ISO/TS 18621-21 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. ISO/TS 1862121 does not cover any non-adjacent or non-horizontal or 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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