Anadaptive embedded architecture for real-time Particle Image Velocimetry algorithms

Particle Image Velocimetry (PIV) is a method of imaging and analysing fields of flows. The PIV techniques compute and display all the motion vectors of the field in a resulting image. Speeds more than thousand vectors per second can be required, each speed being environment-dependent. Essence of this work is to propose an adaptive FPGA-based system for real-time PIV algorithms. The proposed structure is generic so that this unique structure can be re-used for any PIV applications that uses the cross-correlation technique. The major structure remains unchanged, adaptations only concern the number of processing operations. The required speed (corresponding to the number of vector per second) is obtained thanks to a parallel processing strategy. The image processing designer duplicates the processing modules to distribute the operations. The result is a FPGA-based architecture, which is easily adapted to algorithm specifications without any hardware requirement. The design flow is fast and reliable.