Camera Tracker Sample

The Camera Tracker sample demonstrates the feature detection and feature tracking capabilities of the dw_features module. It loads a video stream and reads the images sequentially. For each frame, it tracks features from the previous frame and detects new features in the current frame.

Tracked feature points on a single H.264 stream

Running the Sample

The command line for the sample is:

./sample_camera_tracker --video=<video file.h264>

• The video option receives the full path to the video file to load.
• The file must be an H.264 stream.
• Video containers such as MP4, AVI, MKV, etc. are not supported.

Output

The sample creates a window, displays the video, and overlays the list of features.

There are two modes for feature drawing:

• (default) feature trajectories will be overlaied (up to previous 10 frames of history).
• Only the current feature positions will be overlaied by small squares. You can switch drawing mode by pressing 'h' key.

The color represents age of each feature (= how many frames has it been tracked):

• Red: 1 <= age < 5
• Yellow: 5 <= age < 10
• Green: 10 <= age < 20
• Light blue: 20 <= age