What is OpenCV in image processing?

Related questions

1. Which is better Matlab or OpenCV?
2. What is deep convolutional neural network?
3. What is kernel OpenCV?
4. Does OpenCV need GPU?
5. Can OpenCV be used in Matlab?
6. Does OpenCV use machine learning?
7. Is OpenCV an API?
8. Is Matlab easier than C++?
9. Is Python or Matlab faster?
10. Is Python good for image processing?

Tags

1. #processing
2. #opencv
3. #operations
4. #extract
5. #information
6. #perform
7. #image
8. #useful
9. #order
10. #method