opencv-概念

Edge(边缘)：基本上是指颜色有明显变化的地方

Extracting Edge Features:

 

 

Prewitt kernel

HOG Feature Descriptor

Feature Descriptor：It is a simplified representation of the image that contains only the most important information about the image.

 

摘自：https://www.analyticsvidhya.com/blog/2019/08/3-techniques-extract-features-from-image-data-machine-learning-python/?utm_source=blog&utm_medium=computer-vision-learning-path-2020