ISO 18844:2017 PDF

Name: ISO 18844:2017 — Photography — Digital cameras — Image flare measurement
SKU: ISO 18844:2017
Price: 25 EUR
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Photography — Digital cameras — Image flare measurement

Название (английский):

ISO 18844:2017

Photography — Digital cameras — Image flare measurement

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 12
Дата публикации:: 22 мая 2017 г.
Издание:: ISO IS 18844 edition 1 version 1
ICS:: 37.040.10

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Описание (английский):

ISO 18844:2017 specifies the definition of image flare for digital cameras, test patterns, measurement conditions, and methods, so as to enable the comparison of the results of measurement. The methods of measurement are designed to enable the assessment of the performance of digital cameras by using image data output by the digital cameras. ISO 18844:2017 does not specify the aim values or the allowable range of value for the image flare.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 18844:2017 - Photography - Digital cameras - Image flare measurement is an international standard developed by ISO for the photography industry. This standard provides a comprehensive method to define, measure, and compare image flare in digital cameras. Image flare refers to the unwanted increase in signal within a processed digital image caused by stray light that does not originate from the intended scene, impacting the overall image quality, particularly contrast and shadow details.

ISO 18844:2017 outlines the use of specific test charts, measurement conditions, and detailed procedures to objectively assess and report image flare in digital camera systems. The measurement process encompasses all factors contributing to image flare, such as lenses, camera body construction, image sensors, and in-camera image processing.

Key Topics

Definition of Image Flare Image flare is identified as the increase in image signal due to light detected by the sensor that does not correspond to a point in the photographed subject. This includes contributions from internal lens reflections, sensor artifacts, body-induced stray light, and image processing algorithms.

Test Patterns and Charts The standard specifies the design and usage of reflection-type and transparent-type charts, used for both single spot and multiple spot measurement. These charts feature specified ratios of black and white areas and are calibrated for uniformity and contrast.

Measurement Conditions ISO 18844:2017 details environmental and camera settings, such as:

Standardized lighting (illuminance and luminance levels)
Chart reflectance or transmittance properties
Camera exposure settings, white balance, focus method, and, when relevant, lens hood use

Measurement Types The standard defines three types of measurement:

Type A: For cameras with manual exposure, using high-contrast charts and variable exposures
Type B: For cameras with automatic exposure, using consistent exposure across charts
Type C: For very high contrast charts, applicable to both exposure control scenarios

Result Presentation Guidelines are provided for reporting results, including camera and chart details, exposure settings, measurement methodology, and output luma levels.

Applications

Digital Camera Performance Assessment Manufacturers and testing laboratories can utilize ISO 18844:2017 to objectively measure and compare image flare across different digital camera models. This assists in product development and quality assurance.

Photography Equipment Benchmarking The standard enables users, including reviewers and professional photographers, to make informed decisions by offering comparable flare measurements.

Image Quality Optimization Camera designers can analyze how different optical and electronic components, as well as image processing algorithms, influence image flare and can refine their products for improved image clarity.

Standards Compliance and Documentation Adoption of this standard facilitates conformance to recognized measurement practices, essential for technical specifications, marketing claims, and industry certifications.

Related Standards

ISO 9358: Optics and optical instruments - Veiling glare of image forming systems - Definitions and methods of measurement

ISO 12231: Photography - Electronic still picture imaging - Vocabulary

ISO 18383: Photography - Digital cameras - Specification guideline

IEC 61966-2-1: Multimedia systems and equipment - Colour measurement and management - Part 2-1: Default RGB colour space - sRGB

Practical Value

By following ISO 18844:2017, stakeholders across the digital imaging industry gain:

Consistent test methodology for camera image flare

Reliable data for product comparison and quality checks

Industry-wide accepted criteria for image quality evaluation

Implementing the standardized image flare measurement supports innovation, transparency, and customer trust in the performance claims of digital cameras.

ISO 18844:2017 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

Practical Value

Технические детали

BS ISO 9358:1994

Optics and optical instruments. Veiling glare of image forming systems. Definitions and methods of measurement

SIST ISO 12231-1:2025

Digital imaging - Vocabulary - Part 1: Fundamental terms

BS ISO 18383:2025

Digital imaging. Specification guideline for digital cameras.

IEC 61966-2-1:1999/AMD1:2003

Amendment 1 - Multimedia systems and equipment - Colour measurement and management - Part 2-1: Colour managem…