Abstract: We propose a fast quality-guided phase unwrapping algorithm for a heterogeneous environ-ment.A tessellated interferogram is uploaded into the shared memory of a GPU,and then a high den-sity quality map is computed synchronously.The quality map is downloaded into the memory of thehost,and the final unwrapped result is guided by the quantized quality-guided strategy through theCPU.This algorithm takes both advantage of GPU and CPU computing characteristics to achieve fastquality guided phase unwrapping.Tests performed on InSAR and InSAS interferograms confirm thehigh efficiency of the proposed algorithm.