Book Image

Learning OpenCV 3 Computer Vision with Python

Book Image

Learning OpenCV 3 Computer Vision with Python

Overview of this book

Table of Contents (16 chapters)
Learning OpenCV 3 Computer Vision with Python Second Edition
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
6
Retrieving Images and Searching Using Image Descriptors
Index

Detecting shapes


The detection of shapes with the Hough transform is limited to circles; however, we already implicitly explored detecting shapes of any kind, specifically when we talked about approxPolyDP. This function allows the approximation of polygons, so if your image contains polygons, they will be quite accurately detected, combining the usage of cv2.findContours and cv2.approxPolyDP.