In order to solve the hole-filling mismatch problem in virtual view synthesis, a three-step repairing(TSR) algorithm was proposed. Firstly, the image with marked holes is decomposed by the non-subsampled shear wave tr...In order to solve the hole-filling mismatch problem in virtual view synthesis, a three-step repairing(TSR) algorithm was proposed. Firstly, the image with marked holes is decomposed by the non-subsampled shear wave transform(NSST), which will generate high-/low-frequency sub-images with different resolutions. Then the improved Criminisi algorithm was used to repair the texture information in the high-frequency sub-images, while the improved curvature driven diffusion(CDD) algorithm was used to repair the low-frequency sub-images with the image structure information. Finally, the repaired parts of high-frequency and low-frequency sub-images are synthesized to obtain the final image through inverse NSST. Experiments show that the peak signal-to-noise ratio(PSNR) of the TSR algorithm is improved by an average of 2-3 dB and 1-2 dB compared with the Criminisi algorithm and the nearest neighbor interpolation(NNI) algorithm, respectively.展开更多
Using FLAC3D numerical simulation software,the influence laws that the different mining depth,mining width and filling step have on the surface subsidence and horizontal movement under the condition of filling mining ...Using FLAC3D numerical simulation software,the influence laws that the different mining depth,mining width and filling step have on the surface subsidence and horizontal movement under the condition of filling mining has been studied.The functional relation among full subsidence and horizontal movement of surface,mining depth,mining width and filling step has been given,which provides theoretical formulas been referenced for filling mining theory and has a certain guiding value.展开更多
基金supported by the National Natural Science Foundation of China (61834005, 61772417, 61602377, 61634004,61802304)the Shaanxi Province Key R&D Plan (2021GY-029)。
文摘In order to solve the hole-filling mismatch problem in virtual view synthesis, a three-step repairing(TSR) algorithm was proposed. Firstly, the image with marked holes is decomposed by the non-subsampled shear wave transform(NSST), which will generate high-/low-frequency sub-images with different resolutions. Then the improved Criminisi algorithm was used to repair the texture information in the high-frequency sub-images, while the improved curvature driven diffusion(CDD) algorithm was used to repair the low-frequency sub-images with the image structure information. Finally, the repaired parts of high-frequency and low-frequency sub-images are synthesized to obtain the final image through inverse NSST. Experiments show that the peak signal-to-noise ratio(PSNR) of the TSR algorithm is improved by an average of 2-3 dB and 1-2 dB compared with the Criminisi algorithm and the nearest neighbor interpolation(NNI) algorithm, respectively.
文摘Using FLAC3D numerical simulation software,the influence laws that the different mining depth,mining width and filling step have on the surface subsidence and horizontal movement under the condition of filling mining has been studied.The functional relation among full subsidence and horizontal movement of surface,mining depth,mining width and filling step has been given,which provides theoretical formulas been referenced for filling mining theory and has a certain guiding value.
