GB/T 21649.2-2025 "Particle size analysis - Image analysis methods - Part 2: Dynamic image analysis" is applicable to the particle size analysis of moving particles with clear distinction from the background, and specifies the measurement method for converting moving particles into binary images. It defines the technical requirements for optical image acquisition equipment, covering aspects such as particle relative motion correction, motion blur processing, and depth of field control. The impact of particle motion on images can be corrected through instrument optimization or software programs. The subsequent binary image characterization method refers to GB/T 21649.1-2024. Compared to static image analysis, this method can measure more particles, providing guidance for instrument calibration and particle size distribution measurement, thereby ensuring the efficiency and reliability of testing.
| Status | Active | ||
|---|---|---|---|
| CCS | A28 | ICS | 19.120 |
| Release Date | 2025-06-30 00:00:00 | Implementation Date | 2026-01-01 00:00:00 |
