The speed of the phase computation affects the optical three dimensional measurement speed in the Hilbert transform profilometry.Because the pixels which still need to be processed and the already processed pixels are not interdependent

the phase of each pixel can be calculated separately.Therefore

the same program can be executed on multiple threads in parallel with high arithmetic intensity.This allows the phase computation done on the GPU with the help of the powerful unified architecture graphics processor parallel computational capability.This paper analyzes the characteristics of the phase computation

and then implements the code for allowing the CPU with GPU working together to solve the problem of the low efficiency of the phase computation on CPU.Experiments show that by the GPU acceleration the computation speed has been greatly improved with the same quality of the phase computation.