Inventor · Sunnyvale, CA, US

Pingshan Li

42Patents
9h-index
26Co-inventors
75Inventor score

Filing activity: May 7, 1999 → Feb 1, 2019

Most-cited inventions

PatentTitleAreaCited byStatus
US8280194B2 Reduced hardware implementation for a two-picture depth map algorithm Physics 185 Active
US8553093B2 Method and apparatus for super-resolution imaging using digital imaging devices Electricity 183 Active
US6563957B1 Tone dependent error diffusion Electricity 46 Expired
US7239726B2 System and method for effectively extracting facial feature information Physics 26 Expired
US8027582B2 Autofocus with confidence measure Physics 20 Active
US7155036B2 Face detection under varying rotation Physics 19 Expired
US8194995B2 Fast camera auto-focus Electricity 13 Active
US8848094B2 Optimal blur matching selection for depth estimation Physics 11 Active
US8335390B2 Blur function modeling for depth of field rendering Physics 9 Active
US7672508B2 Image classification based on a mixture of elliptical color models Physics 7 Active
US8624986B2 Motion robust depth estimation using convolution and wavelet transforms Physics 6 Active
US8045046B1 Four-dimensional polynomial model for depth estimation based on two-picture matching Electricity 5 Active
US8229172B2 Algorithms for estimating precise and relative object distances in a scene Physics 4 Active
US8736747B2 Camera autofocus adaptive blur matching model fitting Electricity 3 Active
US10916019B2 Moving object detection in image frames based on optical flow maps Physics 3 Active
US8199248B2 Two-dimensional polynomial model for depth estimation based on two-picture matching Physics 3 Active
US8736707B2 System and method for utilizing scene detection in a depth estimation procedure Physics 2 Active
US7609891B2 Evaluation of element distribution within a collection of images based on pixel scatterness Physics 2 Active
US8564712B2 Blur difference estimation using multi-kernel convolution Physics 2 Active
US7734107B2 System and method for performing wavelet-based texture feature extraction and classification Physics 2 Active
US9066002B2 System and method for utilizing enhanced scene detection in a depth estimation procedure Electricity 2 Active
US11085296B2 Method for controlling subsidence area caused by underground mining in adjoining open-pit mine Fixed Constructions 2 Active
US9418432B2 Imaging system with depth estimation mechanism and method of operation thereof Physics 1 Active
US9208570B2 System and method for performing depth estimation by utilizing an adaptive kernel Physics 1 Active
US11037303B2 Optical flow based detection and tracking of multiple moving objects in successive frames Physics 1 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.