fix cpp infer of jdetracker (#6500)

deploy/cpp/src/tracker.cc

@@ -58,8 +58,8 @@ bool JDETracker::update(const cv::Mat &dets, const cv::Mat &emb, std::vector<Tra
     TrajectoryPool candidates(dets.rows);
     for (int i = 0; i < dets.rows; ++i)
     {
-        float score = *dets.ptr<float>(i, 4);
-        const cv::Mat &ltrb_ = dets(cv::Rect(0, i, 4, 1));
+        float score = *dets.ptr<float>(i, 1);
+        const cv::Mat &ltrb_ = dets(cv::Rect(2, i, 4, 1));
         cv::Vec4f ltrb = mat2vec4f(ltrb_);
         const cv::Mat &embedding = emb(cv::Rect(0, i, emb.cols, 1));
         candidates[i] = Trajectory(ltrb, score, embedding);

deploy/pptracking/cpp/src/tracker.cc

@@ -56,8 +56,8 @@ bool JDETracker::update(const cv::Mat &dets,
   ++timestamp;
   TrajectoryPool candidates(dets.rows);
   for (int i = 0; i < dets.rows; ++i) {
-    float score = *dets.ptr<float>(i, 4);
-    const cv::Mat &ltrb_ = dets(cv::Rect(0, i, 4, 1));
+    float score = *dets.ptr<float>(i, 1);
+    const cv::Mat &ltrb_ = dets(cv::Rect(2, i, 4, 1));
     cv::Vec4f ltrb = mat2vec4f(ltrb_);
     const cv::Mat &embedding = emb(cv::Rect(0, i, emb.cols, 1));
     candidates[i] = Trajectory(ltrb, score, embedding);