eld1e6o's profile - activity

I have created a branch (badsolution), that is working but it is only conceptual. I reserve static memory inside public

I have created a branch (badsolution), that is working but it is only conceptual. I reserve static memory inside the pub

@sturkmen, very thanks for your time and to test my code. I'm advancing and seing that I'm making some type of ODR (http

@berak, thanks for your reply, my old post was an entire disaster and to maintain some level, I redo it. It is not neces

@sturkmen @berak Thanks fo your comments, I have re wrotten my code and pushed to a public repo also, following your com

Correct way to make priv / public header and pass cv::Mat Hello! I need to make a .so or .a library and different heade

Correct way to make priv / public header and pass cv::Mat Hello! I need to make a .so or .a library and different heade

@sturkmen @berak Thanks for all, that's right, I made a lot of mistakes, will delete my post and make it again. Thanksfo

Problem to pass cv::Mat as argument trough library Hello! I need to make a library and pass a cv::Mat as argument of a

CMake cross compiler problem with pkg_check_modules for some packages Hello! Introduction I'm trying to cross compile

CMake cross compiler problem with pkg_check_modules for some packages Hello! Introduction I'm trying to cross compile

CMake cross compiler problem with pkg_check_modules for some packages Hello! Introduction I'm trying to cross compile

Very thanks! (I am sorry for my mistake)

I'm trying to calculate the mass center of images using OpenCV and I got errors, as you can see in the images (the mass center must not be to closest of any side in this cases). Also, I got mass centers that depends of the rotation and that's incorrect. I have tried with official example code and I got the same results

Next, you can see the code, input image and output image. Only the "0" triangle seems to be right.

I tried with different example codes, and the results are the same.

Output image: Input image:

Waited results:

Example code:

#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>
#include <stdio.h>
#include <stdlib.h>

using namespace cv;
using namespace std;

Mat src; Mat srcGray;
RNG rng(12345);

int main(int argc, char **argv)
{
    // Load source image and convert it to gray
    src = imread(argv[1], 1);

    // Convert image to gray and blur it
    cvtColor(src, srcGray, CV_BGR2GRAY);
    blur(srcGray, srcGray, Size(3, 3));

    Mat srcThresh;
    double otsu;

    otsu = threshold(srcGray, srcThresh, 0, 255, CV_THRESH_BINARY | CV_THRESH_OTSU);

    Mat cannyOut;
    Canny(srcGray, cannyOut, otsu, otsu * 1 / 2, 3, 1);

    // Find contours
    vector<vector<Point> > contours;
    vector<Vec4i> hierarchy;

    findContours(cannyOut, contours, hierarchy, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE, Point(0, 0));

    // Get the moments
    vector<Moments> mu(contours.size());
    for (int i = 0; i < contours.size(); i++)
    {
        mu[i] = moments(contours[i], false);
    }

    //  Get the mass centers:
    vector<Point2f> mc(contours.size());
    for (int i = 0; i < contours.size(); i++)
    {
        mc[i] = Point2f(mu[i].m10 / mu[i].m00, mu[i].m01 / mu[i].m00);
    }

    // Draw contours
    Mat drawing = Mat::zeros(cannyOut.size(), CV_8UC3);
    string sObjectNumber;          // string which will contain the result
    ostringstream sContourNumber;   // stream used for the conversion

    for (int i = 0; i< contours.size(); i++)
    {
//        drawing.setTo(Scalar(0.0,0.0,0.0));
        sContourNumber << i;
        sObjectNumber = sContourNumber.str();   // Convert int to string
        Point pCoordinates(mc[i].x + 3, mc[i].y - 3);   // Text's coordinates (A little bit off from mass center)
        Scalar color = Scalar(rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255));
        drawContours(drawing, contours, i, color, 2, 8, hierarchy, 0, Point());
        circle(drawing, mc[i], 4, color, -1, 8, 0);     // Draw mass center
        putText(drawing, sObjectNumber, pCoordinates, CV_FONT_HERSHEY_COMPLEX, 1, color, 2, 8); // Write object number
        sContourNumber.str("");     // Clear string
        sContourNumber.clear();     // Clear any error flags

//        imshow("Contours", drawing);
//        waitKey();
    }

    double hu[7];
    for (int i = 0; i < contours.size(); i++)
    {
        cout << "Contour: " << i << " Area: " << contourArea(contours[i]) << " Length: " << arcLength(contours[i], true) << "\n";

        for (int j = 0; j < 7; j++)
        {
            HuMoments(mu[i], hu);
            cout << "Contour: " << i << " Hu: " << j << " Result: " << hu[j] << "\n";
        }
        cout << "\n";
    }

    imshow("Contours", drawing);

    waitKey(0);
    return(0);
}

Can somebody helpme?

Very thanks for all! Diego