As same with Matlab, we can use inequality ">,<,==,>=,<=".
Firstly, we check equal to '0' or '>0', the result is output to '255' if satisfied.
Divide by 255 then elements have left '0' or '1'
And sum all of the element, then we can get the number of zero.
Source code is here..
Mat a = Mat(5, 5, CV_8UC1);
randn(a, 0, 1);
Mat b = (a == 0) / 255;
Mat c = (a > 0) / 255;
cout << "Input matrix matrix a = " << endl;
cout << a << endl;
cout << "number of 0 = " << sum(b);
cout << ", number of over 0 = " << sum(c) << endl << endl;
cout << "matrix b = " << endl;
cout << b << endl;
cout << "matrix c = " << endl;
cout << c << endl;
make well divided linear coordinate And make pair coordinate Please see code for detail explanation. import numpy as np import cv2 ...
This is dithering example, it make image like a stippling effect. I referenced to blew website. wiki page: https://en.wikipedia.org/wik...
As you can see in the following video, I created a class that stitching n cameras in real time. https://www.youtube.com/user/feelmare/sear...
opencv lecture 4-1 example code < gist start > < gist end >
Image size of origin is 320*240. Processing time is 30.96 second took. The result of stitching The resul...
//Singular value decomposition : Mat w, u, v; SVDecomp(data, w, u, v); // A = U W V^T //The flags cause U and V to be returned transpose...
setTo masking example gist start gist end CopyTo masking example gist start gist end
RTSP(Real Time Streaming Protocol) is video streaming, it usually sent from network camera. VideoCapture function in opencv also can get r...
This post is about how to copy Mat data to vector and copy vector data to Mat. Reference this example source code. printf ( "/////...
I once wrote the following article. http://study.marearts.com/2014/04/opencv-study-mat-point-access-method.html This article is a sample c...