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Windows to Mac code translation

[3 Replies]
- 19-Apr-2011 06:29 AM
- Forum: General Discussion
Hi All,

I am new to processing so please forgive my ignorance. After countless google searches and help from my peers I havent been able to convert coding for Windows to run successfully on my Mac. If anyone knows how to work both platforms please let me know what the difference between the two is so I can go about fixing it.

Here is the code I am trying to convert:

#include "cv.h"

#include "highgui.h"

IplImage* GetThresholdedImage(IplImage* img)

{

// Convert the image into an HSV image

  IplImage* imgHSV = cvCreateImage(cvGetSize(img), 8, 3);

  cvCvtColor(img, imgHSV, CV_BGR2HSV);

  IplImage* imgThreshed = cvCreateImage(cvGetSize(img), 8, 1);

cvInRangeS(imgHSV, cvScalar(20, 100, 100), cvScalar(30, 255, 255), imgThreshed);

cvReleaseImage(&imgHSV);

   return imgThreshed;

}

int main()

{// Initialize capturing live feed from the camera

   CvCapture* capture = 0;

   capture = cvCaptureFromCAM(0);

   // Couldn't get a device? Throw an error and quit

   if(!capture)

   {

   printf("Could not initialize capturing... ");

   return -1;

   }

   // The two windows we'll be using

   cvNamedWindow("video");

   cvNamedWindow("thresh");



   // An infinite loop

   while(true)

   {

   // Will hold a frame captured from the camera

   IplImage* frame = 0;

   frame = cvQueryFrame(capture);



   // If we couldn't grab a frame... quit

   if(!frame)

   break;



   // If this is the first frame, we need to initialize it

   if(imgScribble == NULL)

   {

   imgScribble = cvCreateImage(cvGetSize(frame), 8, 3);

   }



// Holds the yellow thresholded image (yellow = white, rest = black)

   IplImage* imgYellowThresh = GetThresholdedImage(frame);

// Calculate the moments to estimate the position of the ball

   CvMoments *moments = (CvMoments*)malloc(sizeof(CvMoments));

   cvMoments(imgYellowThresh, moments, 1);

   // The actual moment values

   double moment10 = cvGetSpatialMoment(moments, 1, 0);

   double moment01 = cvGetSpatialMoment(moments, 0, 1);

   double area = cvGetCentralMoment(moments, 0, 0);

// Holding the last and current ball positions

   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) ", 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(frame, imgScribble, frame);

   cvShowImage("thresh", imgYellowThresh);

   cvShowImage("video", frame);

// Wait for a keypress

   int c = cvWaitKey(10);

   if(c!=-1)

   {

   // If pressed, break out of the loop

   break;

   }

  // Release the thresholded image+moments... we need no memory leaks.. please

   cvReleaseImage(&imgYellowThresh);

   delete moments;

   }

// We're done using the camera. Other applications can now use it

   cvReleaseCapture(&capture);

   return 0;

}

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