ISO/TS 19567-2:2019 PDF

Photography — Digital cameras — Part 2: Texture analysis using stochastic pattern

Название (английский):

ISO/TS 19567-2:2019

Photography — Digital cameras — Part 2: Texture analysis using stochastic pattern

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 20
Дата публикации:: 16 июля 2019 г.
Издание:: ISO TS 19567 edition 1 version 1
ICS:: 37.040.10

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Описание (английский):

This document specifies a protocol to measure the texture reproduction in images captured and processed by digital cameras including cameras in other devices e.g. in camera phones. This document specifies protocols for the measurement of texture reproduction using test charts with stochastic pattern. NOTE The measurement method specified in this document is for objective evaluations of texture reproduction, of which the results are sometimes inconsistent with subjective evaluations (See Annex C).

Технические детали

Технический комитет: ISO/TC 42 - Photography
SKU: ISO/TS 19567-2:2019

Abstract

Overview

ISO/TS 19567-2:2019 - Photography - Digital cameras - Part 2: Texture analysis using stochastic pattern specifies an objective protocol to measure texture reproduction in images captured and processed by digital still cameras, including cameras embedded in devices such as smartphones. The standard defines test-chart design (stochastic “dead leaves”/spilled-coins charts), capture conditions, analysis methods and reporting formats (including SFR curves and single-value metrics) to quantify how well low‑contrast fine details are preserved or modified by capture and image‑processing pipelines.

Key Topics and Requirements

Test chart: Uses a stochastic “dead leaves” chart (random circles of varying size and colour) placed on an 18 % grey background; chart area and marker placement requirements are specified.
Measurement targets: Objective evaluation of low‑contrast fine detail (texture) using spatial-frequency analysis; outputs include SFR (Spatial Frequency Response) curves and single-number metrics such as SFR10, SFR50 and texture acutance.
Capture set-up: Supports both reflective and transmissive charts; camera placement and lamp/baffle arrangement to avoid specular reflections are defined.
Lighting and environment: Default illuminant ~5 700 K ± 1 000 K; recommended illuminance for general tests ~1 000 lx to 2 000 lx (transmissive equivalent noted); temperature ~23 °C ± 3 °C; illumination non‑uniformity

Overview

Key Topics and Requirements

Test chart: Uses a stochastic “dead leaves” chart (random circles of varying size and colour) placed on an 18 % grey background; chart area and marker placement requirements are specified.
Measurement targets: Objective evaluation of low‑contrast fine detail (texture) using spatial-frequency analysis; outputs include SFR (Spatial Frequency Response) curves and single-number metrics such as SFR10, SFR50 and texture acutance.
Capture set-up: Supports both reflective and transmissive charts; camera placement and lamp/baffle arrangement to avoid specular reflections are defined.
Lighting and environment: Default illuminant ~5 700 K ± 1 000 K; recommended illuminance for general tests ~1 000 lx to 2 000 lx (transmissive equivalent noted); temperature ~23 °C ± 3 °C; illumination non‑uniformity

ISO/TS 19567-2:2019 PDF

Технические детали

Abstract

Overview

Key Topics and Requirements

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Abstract

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