Linking landscape patterns to specific ecological processes has been and will continue to be the key topic in landscape ecology.However,this goal is difficult to achieve by using the traditional landscape metric based...Linking landscape patterns to specific ecological processes has been and will continue to be the key topic in landscape ecology.However,this goal is difficult to achieve by using the traditional landscape metric based on the Patch-Mosaic Model(PMM),as they don’t integrate ecological processes with landscape patterns.In this paper,we proposed a conceptual model,i.e.,the Source-Pathway-Sink Model(SPSM),which designates the role of a landscape unit into "source", "sink",or "pathway" based on specific ecological processes during the landscape pattern analysis.While the traditional landscape metrics derived from the PMM model is visual-or geometrical-oriented and lack of linkage to ecological significance,the SPSM model is process-oriented,dynamic,and scale dependent.A comparison between the PMM and the SPSM models shows that the SPSM model is complementary to the PMM model,and can provide a simple and dynamic perspective on landscape pattern analysis.The SPSM model may represent a conceptual innovation in landscape ecology.展开更多
Inpainting is the process of reconstructing damaged regions of images and video frames.This study deals with weaknesses of the current video inpainting techniques,when an object is totally damaged,and a framework for ...Inpainting is the process of reconstructing damaged regions of images and video frames.This study deals with weaknesses of the current video inpainting techniques,when an object is totally damaged,and a framework for video inpainting is proposed.Using this framework,the moving object is separated from the background.A large mosaic image is constructed using the moving object and then a patch-based method with large patches is used to fill holes.In each frame,the inpainted foreground is obtained by placing the object in its location.Missing areas of the stationary background are also filled separately and the final video is produced by composing the inpainted background and object frames.Results for three video sequences with an occluded object show that this approach represents the object in the missing region better than other approaches.展开更多
基金supported by the National Natural Science Foundation of China (Grant Nos. 41590841 & 41230633)
文摘Linking landscape patterns to specific ecological processes has been and will continue to be the key topic in landscape ecology.However,this goal is difficult to achieve by using the traditional landscape metric based on the Patch-Mosaic Model(PMM),as they don’t integrate ecological processes with landscape patterns.In this paper,we proposed a conceptual model,i.e.,the Source-Pathway-Sink Model(SPSM),which designates the role of a landscape unit into "source", "sink",or "pathway" based on specific ecological processes during the landscape pattern analysis.While the traditional landscape metrics derived from the PMM model is visual-or geometrical-oriented and lack of linkage to ecological significance,the SPSM model is process-oriented,dynamic,and scale dependent.A comparison between the PMM and the SPSM models shows that the SPSM model is complementary to the PMM model,and can provide a simple and dynamic perspective on landscape pattern analysis.The SPSM model may represent a conceptual innovation in landscape ecology.
文摘Inpainting is the process of reconstructing damaged regions of images and video frames.This study deals with weaknesses of the current video inpainting techniques,when an object is totally damaged,and a framework for video inpainting is proposed.Using this framework,the moving object is separated from the background.A large mosaic image is constructed using the moving object and then a patch-based method with large patches is used to fill holes.In each frame,the inpainted foreground is obtained by placing the object in its location.Missing areas of the stationary background are also filled separately and the final video is produced by composing the inpainted background and object frames.Results for three video sequences with an occluded object show that this approach represents the object in the missing region better than other approaches.
