Top "Feature-detection" questions

Feature detection is a process in computer vision that aims to find visual features within the image with particular desirable properties.

HOG features visualisation with OpenCV, HOGDescriptor in C++

I use the HOGDescriptor of the OpenCV C++ Lib to compute the feature vectors of an images. I would like …

c++ opencv feature-detection
OpenCV image comparison in Android

[EDIT] I have devised some code for image comparison. The matching part is still a bit flawed and I would …

android opencv feature-detection surf image-comparison
How to determine if an Android device has a touchscreen?

I'm spending considerable time in making my UI to work with keyboard input only. But in the end I'm not …

android feature-detection touchscreen
OpenCV: howto use mask parameter for feature point detection (SURF)

I want to limit a SurfFeatureDetector to a set of regions (mask). For a test I define only a single …

c++ opencv feature-detection surf roi
OpenCV ORB detector finds very few keypoints

I'm trying to use the ORB keypoint detector and it seems to be returning much fewer points than the SIFT …

python opencv computer-vision feature-detection
Laser light detection with OpenCV and C++

I want to track a laser light dot(which is on a wall) with a webcam and i am using …

c++ opencv webcam feature-detection background-subtraction
Classification of detectors, extractors and matchers

I am new to opencv and trying to implement image matching between two images. For this purpose, I'm trying to …

c++ image-processing opencv computer-vision feature-detection
How to train and predict using bag of words?

I have a folder of images of a car from every angle. I want to use the bag of words …

opencv machine-learning sift feature-detection
Facial expression recognition from webcam

I am currently working on a project where I have to extract the facial expression of a user (only one …

opencv expression webcam face-detection feature-detection
How to get points coordinate position in the face landmark detection program of dlib?

There is one example python program in dlib to detect the face landmark position. face_landmark_detection.py This program …

feature-detection dlib