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8.6

what is this error?

Asked by gen12324 in Microsoft Visual C++, Windows Programming, Algorithms

Tags: able to solve?

May i know what causes this error?

1>c:\program files\opencv\cvaux\include\cvvidsurv.hpp(285) : error C2440: '=' : cannot convert from 'errno_t' to 'char *'

Below are the codes i got it from website

Get your answer NOW

         
           
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             #include "stdafx.h"
#include "cv.h" 
#include "cvaux.h" 
#include "highgui.h" 
#include <ctype.h> 
#include <stdio.h> 
 
IplImage *frame1 = NULL, *frame2 = NULL, *frame3 = NULL; 
IplImage *diff1 = NULL, *diff2 = NULL, *result = NULL; 
IplImage* cannyImg; 
 IplImage *grayImg = 0; // gray image 
 
int main(int argc, char** argv) 
{ 
int height,width,step,channels; 
uchar *data1, *data2, *data3, *diffData1, *diffData2, *resultData; 
 
int i, j; 
int threshold = 30; 
int diff; 
 
/* Start capturing */ 
 
CvCapture* capture = 0; 
 
/*capturing from cam 
if( argc == 1 || (argc == 2 && strlen(argv[1]) == 1 && 
isdigit(argv[1][0]))) 
capture = cvCaptureFromCAM( argc == 2 ? argv[1][0] - '0' : 0 ); 
else if( argc == 2 ) 
capture = cvCaptureFromAVI( argv[1] ); 
 */ 
  
capture = cvCaptureFromAVI( "car.avi" ); 
 
 
int mode = CV_RETR_EXTERNAL; 
  
    mode = CV_RETR_CCOMP; //detect both outside and inside contour 
  
 
if( !capture ) 
 
{ 
        
fprintf(stderr,"Could not initialize...\n"); 
return -1; 
 
} 
 
/* Capture 1 video frame for initialization */ 
 
frame2 = cvQueryFrame(capture);    // retrive from the video 
frame3 = cvQueryFrame(capture); 
 
/* Create windows */ 
 
cvNamedWindow("Actual Video", 1);    // creating window 
 
cvNamedWindow("With Differencing", 1); 
cvMoveWindow("With Differencing", 500,0); 
cvNamedWindow("BackGround", 1); 
cvMoveWindow("BackGround", 0,350); 
 
cvNamedWindow("canny Edge",1); 
cvMoveWindow("canny Edge", 750, 350); 
 
CvBGStatModel* bg_model; 
 
bg_model =cvCreateGaussianBGModel( frame2 ); 
 
/* Get properties of frame */ 
 
width = frame2->width; 
height = frame2->height; 
step = frame2->widthStep; 
channels = frame2->nChannels; 
 
int key=-1; 
while(key != 'q') 
{ 
        
/* Get consecutive frames */ 
 
frame1 = cvCloneImage(frame2); 
 
// cvReleaseData(frame2); 
// cvReleaseImage(&frame2); 
 
frame2 = cvCloneImage(frame3); 
 
// cvReleaseData(frame3); 
// cvReleaseImage(&frame); 
 
frame3 = cvQueryFrame(capture); 
 
/* Initialize difference and result frames */ 
diff1 = cvCloneImage(frame3); 
diff2 = cvCloneImage(frame3); 
result = cvCloneImage(frame3); 
 
 
 
/* Image is treated as as unsigned char data hence we use an 
unsigned char pointer to point to the same to access pixels */ 
 
data1 = (uchar *)frame1->imageData; 
data2 = (uchar *)frame2->imageData; 
data3 = (uchar *)frame2->imageData; 
 
diffData1 = (uchar *)diff1->imageData; 
diffData2 = (uchar *)diff2->imageData; 
resultData = (uchar *)result->imageData; 
 
/* Get difference of frames */ 
 
cvAbsDiff(frame2,frame1,diff1); 
cvAbsDiff(frame3,frame2,diff2); 
 
cvUpdateBGStatModel( frame2, bg_model ); 
 
// canny edge detection 
    
 
// Check for threshold 
 
for(i=0;i<=height-1;i++) 
{ 
for(j=0;j<=width-1;j++) 
{ 
//Difference depends on sum of pixels on each channel 
 
if(((diffData1[i*step+j*channels+0] + 
diffData1[i*step+j*channels+1] + diffData1[i*step+j*channels+2]) > 
threshold) && ((diffData2[i*step+j*channels+0] + 
diffData2[i*step+j*channels+1] + diffData2[i*step+j*channels+2]) > 
threshold)) 
{ 
resultData[i*step+j*channels+0] = 255; 
resultData[i*step+j*channels+1] = 255; 
resultData[i*step+j*channels+2] = 255; 
} 
else 
{ 
resultData[i*step+j*channels+0] = 0; 
resultData[i*step+j*channels+1] = 0; 
resultData[i*step+j*channels+2] = 0; 
} 
} 
}
 
//end of frame differencing with binarization 
 
grayImg = cvCreateImage( cvSize(result->width, result->height), 
IPL_DEPTH_8U, 1 ); 
    
    //convert original color image (3 channel rgb color image) to gray-level image 
    cvCvtColor( result, grayImg, CV_BGR2GRAY ); 
    cannyImg = cvCreateImage(cvGetSize(result), IPL_DEPTH_8U, 1); 
 
 cvCanny(grayImg, cannyImg, 50, 150, 3); 
 
 
 
 
 
cvShowImage("Actual Video",frame2); 
cvShowImage("With Differencing",result); 
cvShowImage("BackGround", bg_model->background); 
cvShowImage("canny Edge", cannyImg); 
 
  
// cvReleaseData(frame1); 
cvReleaseImage(&frame1); 
// cvReleaseData(diff1); 
cvReleaseImage(&diff1); 
// cvReleaseData(diff2); 
cvReleaseImage(&diff2); 
// cvReleaseData(result); 
cvReleaseImage(&result); 
 
key = cvWaitKey(10); 
}//end of while 
 
 
cvDestroyWindow("Actual Video"); 
cvDestroyWindow("With Differencing"); 
cvDestroyWindow("BackGround"); 
cvDestroyWindow("canny"); 
cvReleaseCapture(&capture); 
 
return 0; 
}

           
         

20091111-EE-VQP-89 - Hierarchy / EE_QW_3_20080625

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what is this error?

Asked by gen12324 in Microsoft Visual C++, Windows Programming, Algorithms

Tags: able to solve?

About this solution