tracker/pt: fix capture resolution scaling

1 files changed, 4 insertions, 4 deletions

diff --git a/tracker-pt/module/point_extractor.cpp b/tracker-pt/module/point_extractor.cpp
index 17f03f4d..298d8752 100644
--- a/tracker-pt/module/point_extractor.cpp
+++ b/tracker-pt/module/point_extractor.cpp
@@ -209,9 +209,9 @@ static void draw_blobs(cv::Mat& preview_frame, const blob* blobs, unsigned nblob
 
         const f cx = preview_frame.cols / f(size.width),
                 cy = preview_frame.rows / f(size.height),
-                c = (cx+cy)/2;
+                c  = std::fmax(f(1), cx+cy)/2;
 
-        constexpr unsigned fract_bits = 16;
+        constexpr unsigned fract_bits = 8;
         constexpr int c_fract(1 << fract_bits);
 
         cv::Point p(iround(b.pos[0] * cx * c_fract), iround(b.pos[1] * cy * c_fract));
@@ -220,9 +220,9 @@ static void draw_blobs(cv::Mat& preview_frame, const blob* blobs, unsigned nblob
                             ? cv::Scalar(192, 192, 192)
                             : cv::Scalar(255, 255, 0);
 
-        const int overlay_size = (double)dpi > 1.5 ? 2 : 1;
+        const int overlay_size = iround(dpi);
 
-        cv::circle(preview_frame, p, iround((b.radius + f(3.3)) * c * c_fract),
+        cv::circle(preview_frame, p, iround((b.radius + f(3.3) * c) * c_fract),
                    circle_color, overlay_size,
                    cv::LINE_AA, fract_bits);