Importance

Loading Importance Indicators...

Abstract

A TOF system acquires depth data using n≧3 modulation frequencies f₁, f₂, . . . , f_m separately, associated with separate aliasing interval ranges Z₁, Z₂, . . . , Z_m. Next, n intermediate frequencies f_DE1, f_DE2, . . . , f_DEn are generated sorted by order of f_DE1DE2< . . . DEn and corresponding phases are computed from the data acquired separately using f₁, f₂, . . . , f_m. Hierarchically dealiasing of the thus-acquired data is carried out using the generated intermediate frequencies. Hierarchical dealiasing may be carried out one step at a time, if desired. Thus operated, the TOF system provides an effective aliasing interval range Z_D>Z_k for k=1 . . . n as if said TOF system operated at a very low modulation frequency f_D, while simultaneously providing depth resolution certainty as if said TOF system operated at a high modulation frequency f_E. Preferably high modulation frequency f_E is a function of all modulation frequencies f₁, f₂, . . . , f_m, which function may be an arithmetic mean or a weighted average of f₁, f₂, . . . , f_m.

Loading the Abstract Image...

First Claim