I'm writing code for detecting colored Objects in OpenCV 2.3. I found a lot of examples in deprecated OpenCV code for the old c-Inteface.
So I adopted some of the examples code and want to change it to OpenCV 2.0+ Syntax. This is the code I use (it doesn't compile!):
cv::Mat ProcessorWidget::getTresholdImage(Mat &frame)
{
cv::Mat hsvImage;
hsvImage.copySize(frame);
cv::cvtColor(frame, hsvImage, CV_BGR2HSV);
cv::Mat threshedImage;
cv::threshold(frame, threshedImage, double(ui->hTSlider_Thresh->value()), double(ui->lTSlider_Max->value()), cv::THRESH_BINARY);
return threshedImage;
}
cv::Mat ProcessorWidget::trackColoredObject(Mat& frame)
{
// If this is the first frame, we need to initialize it
if(!imgScribble)
{
imgScribble->copySize(frame); //cvCreateImage(cvGetSize(frame), 8, 3);
}
cv::Mat yellowThreshedImage = getTresholdImage(frame);
cv::Moments *moments = (cv::Moments*)malloc(sizeof(cv::Moments));
cv::moments(yellowThreshedImage, moments);
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;
// 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
cv::line(imgScribble, cv::Point(posX, posY), cv::Point(lastX, lastY), cv::Scalar(0,255,255), 5);
}
cv::add(frame, imgScribble, frame);
return frame;
}
The problem is that the compiler complains about this code:
double moment01 = cvGetSpatialMoment(moments, 0, 1);
Error: ../QtCV/processorwidget.cpp:122: error: cannot convert 'cv::Moments*' to 'CvMoments*' for argument '1' to 'double cvGetSpatialMoment(CvMoments*, int, int)'
cvGetSpatialMoments is deprecated and expects cvMoments as first parameter. Mine is cv::Moments (OpenCV 2.0 code).
Now my problem its that there is no cv::GetSpatialMoments or something in new OpenCV 2.0 Syntax. At least I didn't find one. Can anyone help me out here?
Original posters answer in the question converted to actual answer, verbatim:
Ok I found the answer somewhere else:
cv::Moments ourMoment; //moments variable
ourMoment=moments(image); //calculat all the moment of image
double moment10=moment.m10; //extract spatial moment 10
double moment01=moment.m01; //extract spatial moment 01
double area=moment.m00; //extract central moment 00
That does the trick!
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