ISO 14524-2009 PDF
Name in English:
St ISO 14524-2009
Name in Russian:
Ст ISO 14524-2009
Original standard ISO 14524-2009 in PDF full version. Additional info + preview on request
Full title and description
St ISO 14524-2009 — Photography — Electronic still-picture cameras — Methods for measuring opto-electronic conversion functions (OECFs). This International Standard specifies laboratory methods, test targets and procedures to determine the opto‑electronic conversion function of electronic still‑picture cameras (both monochrome and colour) that produce digital image files.
Abstract
ISO 14524:2009 defines the relationship between scene or focal‑plane logarithmic exposures (or scene log luminances) and the camera's digital output levels — the OECF. The standard gives required test conditions, reference chart characteristics (grey‑scale patches), illumination and measurement procedures to derive OECF curves for evaluation of linearity, tonal response and parts of dynamic range for electronic still‑picture cameras.
General information
- Status: Published (current edition confirmed at review).
- Publication date: February 2009 (Edition 2).
- Publisher: International Organization for Standardization (ISO).
- ICS / categories: 37.040.10 (Photography).
- Edition / version: 2 (2009).
- Number of pages: 23.
Scope
The standard applies to electronic still‑picture cameras whose output is encoded as digital image files. It is intended for both monochrome and colour cameras and describes how to measure the OECF: the mapping from focal‑plane log exposures or scene log luminances to the camera's digital output levels. The procedures specify reference chart properties, illumination, exposure series and processing needed to produce reproducible OECF measurements.
Key topics and requirements
- Definition and significance of the opto‑electronic conversion function (OECF).
- Reference test targets: grey‑scale patch values, nominal densities and layout for OECF measurement.
- Specified illumination and exposure conditions for repeatable measurements.
- Procedure to record an exposure series and extract digital output levels per patch.
- Methods to convert measured digital output levels to OECF (log exposure vs digital level curve).
- Requirements for camera settings, metadata, and avoiding in‑camera processing that would alter linear response.
- Guidance on assessing linearity, slope, toe/shoulder behaviour and usable tonal range from the OECF.
- Notes on applicability to monochrome and colour channels and on how OECF interacts with noise and dynamic range assessments (noise dynamic measurements typically referenced to other standards).
Typical use and users
Used by camera and sensor manufacturers, independent test laboratories, image quality engineers, academic researchers and standards bodies to characterize tonal response and linearity of digital imaging systems. Practical uses include product development, quality control, R&D comparisons, test chart suppliers, and as input to other image‑quality evaluations (for example combined with noise and resolution tests).
Related standards
ISO 14524 is part of the ISO/TC 42 photography/imaging family. Closely related documents include ISO 12233 (resolution and spatial frequency response), ISO 12232 (exposure index and related measurements), ISO 15739 (noise measurements for electronic still‑picture imaging), ISO 19264 (image quality/archiving system measurements) and other ISO/TC 42 test methods and technical reports that define terminology, targets and complementary image‑quality tests.
Keywords
OECF, opto‑electronic conversion function, electronic still‑picture camera, digital camera, tonal response, log exposure, grey‑scale test chart, camera linearity, dynamic range, image quality, ISO 14524.
FAQ
Q: What is this standard?
A: ISO 14524:2009 is an International Standard that specifies laboratory methods and test procedures to measure the opto‑electronic conversion function (OECF) of electronic still‑picture cameras.
Q: What does it cover?
A: It covers test targets, illumination and exposure procedures, data extraction and conversion steps needed to produce OECF curves that relate log exposure (or scene luminance) to the camera's digital output levels for monochrome and colour channels.
Q: Who typically uses it?
A: Camera and sensor manufacturers, independent test laboratories, image quality researchers, R&D teams and conformance/quality assurance groups use this standard to characterize and compare tonal response and linearity of imaging devices.
Q: Is it current or superseded?
A: The shown edition is the 2009 (second) edition. The standard was published in February 2009 and has been maintained in ISO's lifecycle; users should check with the official standards body or national standards organizations for the very latest confirmation or any subsequent revisions or technical work items.
Q: Is it part of a series?
A: Yes. ISO 14524 is part of the ISO/TC 42 family of photography and electronic still‑picture imaging standards and is commonly used in conjunction with ISO 12233, ISO 12232, ISO 15739 and related ISO imaging test methods and technical reports.
Q: What are the key keywords?
A: OECF, opto‑electronic conversion function, tonal response, log exposure, grey scale chart, digital camera testing, image quality, linearity, dynamic range.