c++ - 在ubuntu中使用Opencv编译警告

Question

亲爱的社区，最近我一直在学习一些 Opencv，我发现眼动追踪的东西很有趣，所以我找到了一个入门源代码，但是当我尝试编译它时，我收到了这个警告:

ojos2.cpp:15:5: 警告:“int main(int*, char**)”的第一个参数应该是“int”[-Wmain]

更清楚地说，我是从 Ubuntu 终端编译的，这是代码

#include "cv.h"

#include"highgui.h"

IplImage* GetThresholdedImage(IplImage* img)
{

IplImage *imgHSV=cvCreateImage(cvGetSize(img),8,3);
cvCvtColor(img,imgHSV,CV_BGR2HSV);
IplImage *imgThresh=cvCreateImage(cvGetSize(img),8,1);
cvInRangeS(imgHSV,cvScalar(0, 84, 0, 0),cvScalar(179, 256, 11, 0),imgThresh);
cvReleaseImage(&imgHSV);
return imgThresh;
}

int main(int *argv,char **argc)
{

IplImage *imgScribble= NULL;
char c=0;
CvCapture *capture;
capture=cvCreateFileCapture("main.avi");

if(!capture)
{
    printf("Camera could not be initialized");
    exit(0);
}
cvNamedWindow("Simple");
cvNamedWindow("Thresholded");

while(c!=32)
{
    IplImage *img=0;
    img=cvQueryFrame(capture);
    if(!img)
        break;
    if(imgScribble==NULL)
        imgScribble=cvCreateImage(cvGetSize(img),8,3);

    IplImage *timg=GetThresholdedImage(img);
    CvMoments *moments=(CvMoments*)malloc(sizeof(CvMoments));
    cvMoments(timg,moments,1);

    double moment10 = cvGetSpatialMoment(moments, 1, 0);
    double moment01 = cvGetSpatialMoment(moments, 0, 1);
    double area = cvGetCentralMoment(moments, 0, 0);

    static int posX = 0;
    static int posY = 0;

    int lastX = posX;
    int lastY = posY;

    posX = moment10/area;
    posY = moment01/area;
     // Print it out for debugging purposes
    printf("position (%d,%d)\n", posX, posY);
    // We want to draw a line only if its a valid position
    if(lastX>0 && lastY>0 && posX>0 && posY>0)
    {
        // Draw a yellow line from the previous point to the current point
        cvLine(imgScribble, cvPoint(posX, posY), cvPoint(lastX, lastY), cvScalar(0,255,255), 5);
    }
    // Add the scribbling image and the frame...

    cvAdd(img, imgScribble, img);

    cvShowImage("Simple",img);
    cvShowImage("Thresholded",timg);
    c=cvWaitKey(3);
    cvReleaseImage(&timg);
    delete moments;

}
//cvReleaseImage(&img);
cvDestroyWindow("Simple");
cvDestroyWindow("Thresholded");
}

任何帮助都是有用的

提前致谢

Answer 1

原型(prototype)应该是int main (int argv, char *argc[])，主要是指向argv的指针是错误的——char **argc 和 char *argc[] 是同一件事的两种说法，但是写成字符数组的指针比写成字符数组的指针更清楚一个指针。