I have a function in C++ as below.
void trackFilteredObject(int &x, int &y, cv::Mat threshold, cv::Mat cameraFeed){
cv::Mat temp;
threshold.copyTo(temp);
vector< vector> contours;
vector hierarchy;
findContours(temp, contours, hierarchy, CV_RETR_CCOMP, CV_CHAIN_APPROX_SIMPLE);
double refArea = 0;
bool objectFound = false;
if (hierarchy.size() > 0) {
vector< vector> largestContourVec;
largestContourVec.push_back(contours.at(contours.size() - 1));
Eco_Rect = boundingRect(largestContourVec.at(0));
int numObjects = hierarchy.size();
if (numObjects<100){
for (int index = 0; index >= 0; index = hierarchy[index][0]){
cv::Moments moment = moments((cv::Mat)contours[index]);
double area = moment.m00;
if (area>0 && area>refArea){
x = moment.m10 / area;
y = moment.m01 / area;
objectFound = true;
refArea = area;
}
}
if (objectFound == true){
cv::circle(cameraFeed, cv::Point(x, y), 10, cv::Scalar(0, 255, 0), 2);
line(cameraFeed, cv::Point(roi_rect.width / 2, 0), cv::Point(roi_rect.width / 2, roi_rect.height), 2, 2);
line(cameraFeed, cv::Point(0, roi_rect.height / 2), cv::Point(roi_rect.width,roi_rect.height / 2), 2, 2);
}
}
else cv::putText(cameraFeed, "TOO MUCH NOISE! ADJUST FILTER", cv::Point(0, 50), 1, 2, cv::Scalar(0, 0, 255), 2);
}
}
Then I want to convert it to Java to use in android.
void trackFilteredObject(int x, int y, Mat threshold, Mat cameraFeed){
Mat temp = new Mat();
threshold.copyTo(temp);
List contours = new ArrayList();
Mat hierarchy = new Mat();
findContours(temp, contours, hierarchy, 2, 2);
double refArea = 0;
boolean objectFound = false;
if (hierarchy.size() > 0) {
List largestContourVec = new ArrayList();
largestContourVec.add(contours.get(contours.size() - 1));
Eco_Rect = boundingRect(largestContourVec.get(0));
int numObjects = hierarchy.size();
if (numObjects<100){
for (int index = 0; index >= 0; index = hierarchy[index][0]){
Moments moment = moments((Mat)contours.get(index));
double area = moment.get_m00();
if (area>0 && area>refArea){
x = (int) (moment.get_m10() / area);
y = (int) (moment.get_m01() / area);
objectFound = true;
refArea = area;
}
}
if (objectFound == true){
circle(cameraFeed, new Point(x, y), 10, new Scalar(0, 255, 0), 2);
line(cameraFeed, new Point(roi_rect.width / 2, 0), new Point(roi_rect.width / 2, roi_rect.height),new Scalar(0,0,255), 2, 2);
line(cameraFeed, new Point(0, roi_rect.height / 2), new Point(roi_rect.width,roi_rect.height / 2),new Scalar(0,0,255), 2, 2);
}
}
else putText(cameraFeed, "TOO MUCH NOISE! ADJUST FILTER", new Point(0, 50), 1, 2, new Scalar(0, 0, 255), 2);
}
}
However, i do not how to convert 3 lines coding that i commented due to different type of hierarchy in C++ and Java.
hierarchy.size() > 0 Error: cant compare org.opencv.core.Size with int. This one maybe can replace by hierarchy != null.
int numObjects = hierarchy.size(); Error: Basically same as above but i have no idea how to change it. I need to know the size.
for (int index = 0; index >= 0; index = hierarchy[index][0]) Error: In c++ hierarchy is vector type but in Java is Mat type.
Anyone can help me?
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