PX4 FLOW is a smart camera processing optical flow directly on the camera module. It is optimized for processing and outputs images only for development purposes. Its main output is a UART or I2C stream of flow measurements at ~400 Hz.
Project: http://px4.io/modules/px4flow
Dev guide / toolchain installation: http://px4.io/dev/px4flow
To build, run:
make
To flash via the PX4 bootloader (first run this command, then connect the board):
make upload-usb