波浪号运算符在OpenCV中的含义

Question

Consider

cv::Mat A;
cv::Mat B;   
//read images A and B 

What is the meaning of following statement in OpenCV/C++

 A &= ~B ;

Answer 1

That expression( A &= ~B ) in OpenCV could be used to find movement/moved objects in a continuous sequence of images.

Eg

1. Image A

2. Image B - circle moves left

3. Inverse of B => ~B

4. A&=~B => movement or difference of sequenced images

Answer 2

It's got the ordinary meaning. The OpenCV documentation indeed is unclear, the operators are listed under "Matrix expressions "

Answer 3

A = A BitwiseAnd (BitwiseNot B)

Example:

A = 1100
B = 0101

~B = 1010

A&~B = 1000