Using OpenCV, I want to retrieve the INNER contours. However, when I use findContours (), I only seem to be getting the outer contours. How would I retrieve the inner contours of a blob using OpenCV? I am using the C++ API, not C therefore only suggest functions that use the C++ API...
Finding contours is a useful task during image processing. The relevant OpenCV functions are as follows:Find contours in a binary image. void findContours(InputOutputArray image, OutputArrayOfArrays contours, OutputArray hierarchy, int mode, int method, Point offset=Point()) Draw contour outlines...
In this post I showed you how to find a Game Boy screen in an image using Python, OpenCV, and computer vision and image processing techniques. We performed edge detection on our image, found the largest contours in the image using OpenCV and thecv2.findContoursfunction, and approximated them...
I have a trouble withfinding extreme pointsin frames. I am detecting all contours, but I want find there one extreme point, which islowestfrom others (southernmost contour). Here is a preview of screen, what I have. And here is a preview of screen,what I want ! For example, lowest po...
http://answers.opencv.org/question/129819/finding-distance-between-two-curves/ 问题: Hello, Im trying to add tangents along the curve in the image below, like the red lines in the second picture. Then I would like to use the tangents to find the the 90 degrees normal line to the tang...
opencv3报错:in function cv::pointSetBoundingRect function 'cv::pointSetBoundingRect' 真实错误位置: 是因为OpenCV版本不同,cv2 在3.x版本之后就有这个问题。 要把原来的contours=contours...报错:error:OpenCV(4.2.0) C:\projects\opencv-python\opencv\modules\imgproc\src\shapedescr.cpp:784 ...
原文链接:http://answers.opencv.org/question/134783/android-opencv-finding-extreme-points-in-contours/ 导读:本例子使用轮廓分析,寻找到轮廓的极点;使用了STD的SORT特性。 提出问题: Good Evening, I have a trouble withfinding extreme pointsin frames. I am detecting all contours, but I want find there...
http://answers.opencv.org/question/129819/finding-distance-between-two-curves/ 问题: Hello, Im trying to add tangents along the curve in the image below, like the red lines in the second picture. Then I would like to use the tangents to find the the 90 degrees normal li...
Image Processing23(Finding contours in your image ) Goal In this tutorial you will learn how to: Use the OpenCV function cv::findContours 使用OpenCV函数cv :: findContours Use the OpenCV function cv::drawContours 使用OpenCV函数cv :: drawContours Theory 虽然Canny之... ...
Anansi is a computer vision (cv2 and FFmpeg) + OCR (EasyOCR and tesseract) python-based crawler for finding and extracting questions and correct answers from video files of popular TV game shows in the Balkan region. Topics python opencv computer-vision tesseract quiz-game quiz-app ocr-python...