sergimech / webcam_point_features

Point feature extraction from online webcam images

webcam_point_features

Detection of ORB features from online webcam imges.

Class that implements a descriptor for key points. It uses an algorithm for Detecion key points and select the features.

The mask has been applied in a quarter of the total image, in the upper corner, it is a parameter that can be changed easily.

OpenCv lets create a ROI, Region of Interest inside the original image to make the differents experiments.

---

Find ORB point fetaures and descriptors

OpenCV Image Objects and ROI

cv::Mat camSubimage; cv::Rect roi;

clear previous points

point_set.clear();

detect and compute(extract) features

orb_detector->detectAndCompute(camSubimage, cv::noArray(), point_set, descriptor_set);

draw points on the image

cv::drawKeypoints(camSubimage, point_set, camSubimage, 255, cv::DrawMatchesFlags::DEFAULT );

For more information:

http://docs.opencv.org/2.4/modules/features2d/doc/feature_detection_and_description.html