Computer Vision

Thresholding - intensity threshold 에 따라 gray scale image를 binary image로 변환하는 것 - 물체와 배경을 분리할 때 주로 사용(컴퓨터에게는 매우 어려운 일) Def] Region A region is a subset of an image Def] Segmentation(partitioning of an image into regions) Segmentation is grouping pixels into regions, , such that 1. Entire image 2. 3. Each region satisfies a predicate; that is, all points of the partition have some common property. 4. Pixels belonging to adjacent regions, when taken jointly, do not satisfy the predicate. ※ Predicate의 한 예: uniform intensity. ※ For binary vision, segmentation and thresholding are synonymous. Thresholding : original gray scale image : binary image (: threshold) where - 밝은 배경에 어두운 물체인 경우 - 물체의 intensity가 사이에 있을 때, - 일반적인 thresholding scheme: : a set of intensity values for object components