King Abdullah University of Science and Technology

Andres A Aguirre-Pablo

Sigurdur Tryggvi Thoroddsen

Abdulrahman B Aljedaani

Jinhui Xiong

Ramzi Idoughi

Wolfgang Heidrich

Xiong Dun

Erqiang Li

Imaging of complex, non-stationary three dimensional (3D) flow velocities is achieved by encoding depth into color. A flow volumeis illuminated with a continuumof light planeswhereby each depth corresponds to a respective light planehaving a specific wavelength of light. A diffractive componentin the cameraoptics, which records the trajectories of illuminated particleswithin the flow volume, ensures that all light planesare in focus simultaneously. The setup permits a user to track 3D trajectories of particleswithin the flow volumeby combining two dimensional (2D) spatial and one dimensional (1D) color information. For reconstruction, an image formation model for recovering stationary 3D particle positions is provided. 3D velocity estimation is achieved with a variant of a 3D optical flow approach that accounts for both physical constraints as well as the color (rainbow) image formation model.

Rainbow particle imaging velocimetry for dense 3D fluid velocity imaging

A method for tracking moving particles in a fluid. The method includes illuminating the moving particles with an illumination sequence of patterns generated by a light projector; measuring with a single camera light intensities reflected by the moving particles; calculating, based on the measured light intensity, digital coordinates (x', y&#x2032;, z&#x2032;) of the moving particles; determining a mapping function f that maps the digital coordinates (x&#x2032;, y&#x2032;, z&#x2032;) of the moving particles to physical coordinates (x, y, z) of the moving particles; and calculating the physical coordinates (x, y, z) of the moving particles based on the mapping function f. The illumination sequence of patterns is generated with a single wavelength, and light emitted by the projector is perpendicular to light received by the single camera.

Single-camera particle tracking system and method

Growing community of inventors

Thuwal, Saudi Arabia

Andres A Aguirre-Pablo