Tiêu chuẩn quốc tế
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Số hiệu
Standard Number
ISO TS 18621-21:2023
Năm ban hành 2023
Publication date
Tình trạng
A - Còn hiệu lực
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Tên tiếng Anh
Title in English Graphic technology — Image quality evaluation methods for printed matter — Part 21: Measurement of 1D distortions of macroscopic uniformity utilizing scanning spectrophotometers
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Thay thế cho
Replace ISO TS 18621-21:2020
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Chỉ số phân loại Quốc tế (ICS)
By field
37.100.10 - Thiết bị sao chụp
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Số trang
Page 14
Giá:
Price Liên hệ / Contact us
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Phạm vi áp dụng
Scope of standard 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-Sco This document does not cover any non-adjacent or non-horizontal nor vertical patterns. Due to the used spatial frequency, the Macro-Uniformity-Sco |