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The conversion of traditional film into stereo 3D has become an importantproblem in the past decade. One of the main bottlenecks is a disocclusion step,which in commercial 3D conversion is usually done by teams of artists armedwith a toolbox of inpainting algorithms. A current difficulty in this is thatmost available algorithms are either too slow for interactive use, or provideno intuitive means for users to tweak the output. In this paper we present anew fast inpainting algorithm based on transporting along automaticallydetected splines, which the user may edit. Our algorithm is implemented on theGPU and fills the inpainting domain in successive shells that adapt their shapeon the fly. In order to allocate GPU resources as efficiently as possible, wepropose a parallel algorithm to track the inpainting interface as it evolves,ensuring that no resources are wasted on pixels that are not currently beingworked on. Theoretical analysis of the time and processor complexiy of ouralgorithm without and with tracking (as well as numerous numerical experiments)demonstrate the merits of the latter. Our transport mechanism is similar to theone used in coherence transport, but improves upon it by corrected a "kinking"phenomena whereby extrapolated isophotes may bend at the boundary of theinpainting domain. Theoretical results explaining this phenomena and itsresolution are presented. Although our method ignores texture, in many casesthis is not a problem due to the thin inpainting domains in 3D conversion.Experimental results show that our method can achieve a visual quality that iscompetitive with the state-of-the-art while maintaining interactive speeds andproviding the user with an intuitive interface to tweak the results.

Guidefill: GPU Accelerated, Artist Guided Geometric Inpainting for 3D Conversion