Top "Computer-vision" questions

Use this tag for questions related to Computer Vision -- any aspect of software that enables computers to perceive, understand and react to their environment using cameras.

How to calculate the angle from rotation matrix

I am using two image of the single object the object is roated certain degree from its first image. I …

c++ opencv computer-vision euler-angles
Extracting HoG Features using OpenCV

I am trying to extract features using OpenCV's HoG API, however I can't seem to find the API that allow …

opencv computer-vision feature-detection object-recognition feature-extraction
Custom loss function in Keras

I'm working on a image class-incremental classifier approach using a CNN as a feature extractor and a fully-connected block for …

python tensorflow keras deep-learning computer-vision
Non-max suppression

We've learned that you can get the gradient direction with atan(dy/dx) which is the direction orthogonal to the …

computer-vision non-maximum-suppression
Algorithm to detect presence of text on image

With my new assignment I am looking for a method to detect the presence of text on image. The image …

image image-processing opencv computer-vision image-recognition
How to recognize rectangles in this image?

I have a image with horizontal and vertical lines. In fact, this image is the BBC website converted to horizontal …

graphics artificial-intelligence machine-learning computer-vision
What are good algorithms for vehicle license plate detection?

Background For my final project at university, I'm developing a vehicle license plate detection application. I consider myself an intermediate …

c# image computer-vision ocr object-detection
Writing robust (color and size invariant) circle detection with OpenCV (based on Hough transform or other features)

I wrote the following very simple python code to find circles in an image: import cv import numpy as np …

c++ python c opencv computer-vision
Face detection using Cascade Classifier in opencv python

I am using the inbuilt cascade classifier for the face detection. This is how the code is (OpenCV Python Tutorials): …

python-2.7 opencv computer-vision face-detection
What is "semantic segmentation" compared to "segmentation" and "scene labeling"?

Is semantic segmentation just a Pleonasm or is there a difference between "semantic segmentation" and "segmentation"? Is there a difference …

image-processing computer-vision object-detection image-segmentation semantic-segmentation