sunsided / rust-facedetect

OpenCV Face Detection in Rust using Haar Cascades

OpenCV Face Detection in Rust

An experiment with opencv-rust and basically not much more than the multi-scale face detection demo (using a frontal-face Haar cascade) on the first video capture device that can be found.

To run it, execute

cargo run

To exit, press ESC.

Startup errors

If you get errors such as

[ WARN:0] global ./modules/videoio/src/cap_gstreamer.cpp (1100) open OpenCV | GStreamer warning: Cannot query video position: status=0, value=-1, duration=-1
[ WARN:0] global ./modules/videoio/src/cap_gstreamer.cpp (2075) handleMessage OpenCV | GStreamer warning: Embedded video playback halted; module v4l2src0 reported: Internal data stream error.
[ WARN:0] global ./modules/videoio/src/cap_gstreamer.cpp (651) startPipeline OpenCV | GStreamer warning: unable to start pipeline
[ WARN:0] global ./modules/videoio/src/cap_gstreamer.cpp (1257) setProperty OpenCV | GStreamer warning: no pipeline
thread 'main' panicked at src/main.rs:41:9:
Unable to open default camera!
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
[ WARN:0] global ./modules/videoio/src/cap_gstreamer.cpp (616) isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created

then the default camera parameters are incorrect for your device. To select different parameters, use the CAPTURE_WIDTH, CAPTURE_HEIGHT and CAPTURE_DEVICE environment variables:

CAPTURE_WIDTH=848 CAPTURE_HEIGHT=480 CAPTURE_DEVICE=1 cargo run --release