Re: CvCam callback problems

Hi
 
    Maybe you can try better the function CvLine instead of changing pixel by 
pixel.
 
 Hope this help
 
           Rafael Nevarez

leon_rastor <darkcity86@xxxxxxx> wrote:    Hello 
 
 Im new to OpenCv and just starting to learn it, i encountered a 
 problem 
 which i cannot solve and cannot find any solution on web. Im trying 
 to 
 process frames using callback function from CvCam manual (one which 
 draws a line): 
 
 
 void callback(IplImage* image)//Draws blue horizontal lines across 
 the 
 image 
 { 
  IplImage* image1 = image; 
  int i,j; 
 
 
  assert (image); 
 
 
  for(i=0; i<image1->height; i+=10) 
  { 
     for(j=(image1->widthStep)*i; j<(image1->widthStep)*(i+1); 
           j+=image1->nChannels) 
     { 
        image1->imageData[j]   = (char)255; 
        image1->imageData[j+1] = 0; 
        image1->imageData[j+2] = 0; 
 
 
     } 
 
 
  } 
 
 
 
 } 
 
 
 But instead of a line it draws 5 strange colored shapes in different 
 locations in the window. Im using VC++ 6 and openCV beta5. 
 
 Thanks in advance 
 
 
 
 
 
 
 
 
 
     

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