Direct against this kind of situation, the paper presents a method to estimate average size of closely packed particles based on edge density without explicit segmentation.
本文针对这种情况，提出了一种不用经过精细分割，而是基于边缘密度计算紧凑颗粒平均尺寸的算法。
2
Segmentation is a key step during the particle image processing. The segmentation result has direct influence on the counting accuracy and the following processing.
图像分割是颗粒图像处理与分析过程中的关键环节，分割结果的好坏直接影响计数的精度与后续的处理。
3
The direct methods study segmentation algorithms themselves while indirect methods evaluate the performance of algorithms according to the quality of segmented images.