ISO TS 24597-2011 PDF

Full title and description

ISO/TS 24597:2011 — Microbeam analysis — Scanning electron microscopy — Methods of evaluating image sharpness. This Technical Specification defines objective procedures for assessing the sharpness of digitized images produced by a scanning electron microscope (SEM) using standardized image-analysis methods to support instrument testing, quality assurance and comparative measurements across laboratories and instruments.

Abstract

ISO/TS 24597:2011 specifies three objective image-sharpness evaluation methods (Fourier transform, contrast-to-gradient and derivative), and provides requirements for image acquisition, data processing and reporting so that SEM image sharpness can be measured reproducibly and compared between systems. The document includes examples, measurement procedures and guidance for reporting results.

General information

• Status: Published (Technical Specification; confirmed as current during ISO systematic review).
• Publication date: 7 June 2011 (Edition 1, 2011).
• Publisher: ISO — International Organization for Standardization.
• ICS / categories: 37.020 (Optical equipment; scanning electron microscopy / microbeam analysis).
• Edition / version: Edition 1 (ISO/TS 24597:2011).
• Number of pages: 87 pages (English original).

Scope

This Technical Specification applies to digitized images produced by scanning electron microscopes and specifies methods to evaluate image sharpness objectively. It defines three measurement approaches — a Fourier-transform-based method, a contrast-to-gradient method and a derivative-based method — and sets out image acquisition, processing and reporting requirements to achieve reproducible sharpness measurements for SEM images. It is intended for SEM performance assessment and image-quality comparisons rather than for general image-processing research.

Key topics and requirements

• Three objective evaluation methods: Fourier transform (FT) method; contrast-to-gradient (CG) method; derivative (DR) method, with algorithm descriptions and example implementations.
• Specifications for image acquisition parameters (magnification, beam conditions, detector settings, digitization) needed to produce comparable sharpness results.
• Data-processing steps, recommended filtering/conditioning and parameter choices for each evaluation method to ensure repeatability.
• Reporting requirements: how to record acquisition metadata, processing settings and numerical sharpness indicators for publication or inter-laboratory comparison.
• Guidance on specimen selection, test patterns and interpretation of numerical sharpness metrics, including limitations and expected uncertainties.
• Informative examples and annex material illustrating method application and typical result presentation.

Typical use and users

Used by SEM instrument manufacturers, accredited calibration and metrology laboratories, quality-assurance teams in research and industrial microscopy facilities, and researchers developing or validating imaging protocols. The specification supports instrument performance checks, routine QA, comparative studies between microscopes and development of image-acquisition best practices.

Related standards

Related documents include other ISO/TC 202 publications and technical reports on electron microscopy and microbeam analysis (standards addressing instrument calibration, image processing and characterization of detectors), plus relevant ASTM and national standards covering SEM test methods and metrological practice. Users commonly consult ISO/TC 202/SC 4 material and general ISO guidance on measurement uncertainty and interlaboratory comparison when applying ISO/TS 24597:2011.

Keywords

SEM, scanning electron microscope, image sharpness, image quality, Fourier transform, contrast-to-gradient, derivative method, microbeam analysis, image evaluation, metrology.

FAQ

Q: What is this standard?

A: ISO/TS 24597:2011 is a Technical Specification that defines objective, repeatable methods for evaluating the sharpness of digitized scanning electron microscope (SEM) images.

Q: What does it cover?

A: It covers three image-sharpness evaluation methods (Fourier transform, contrast-to-gradient and derivative), plus requirements for image acquisition, processing, reporting and example applications to enable reproducible sharpness measurements in SEM images.

Q: Who typically uses it?

A: SEM manufacturers, metrology and calibration laboratories, QA teams, microscopists and researchers who need objective, comparable measures of SEM image sharpness for instrument testing, acceptance checks or inter-laboratory comparisons.

Q: Is it current or superseded?

A: ISO/TS 24597:2011 was published in June 2011 (Edition 1) and has been maintained through ISO review cycles; the document was confirmed as current during ISO systematic reviews. Users should check national sales points or ISO for any amendments or newer related standards before relying on it for regulatory purposes.

Q: Is it part of a series?

A: It sits within the ISO/TC 202 family addressing electron microscopy and microbeam analysis; while not a numbered multi-part series itself, it complements other ISO documents on SEM practice, calibration and image-quality assessment produced by the same technical committee.

Q: What are the key keywords?

A: SEM image sharpness, Fourier transform, contrast-to-gradient, derivative method, microbeam analysis, image quality, metrology, image evaluation.