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公开(公告)号：EP1116185A1
公开(公告)日：2001-07-18
申请号：EP99970191.5
申请日：1999-09-30
IPC分类号： G06T9/00
CPC分类号： G06T9/001 , G06T9/005 , G06T9/40 , H04N19/537 , H04N19/91
摘要： The invention concerns a method for encoding a digital image for producing a bit stream representing said image, the bit stream length depending on the quality of the desired representation, characterised in that it consists in: a) defining, on the domain of the image to be encoded, a hierarchical meshing comprising a plurality of nested meshes whereof the mesh peaks are said image pixels; b) determining, for each mesh of said hierarchical meshing, a brightness variation between the image to be encoded and an interpolated image obtained from the nested meshing peaks whereto pertains the mesh concerned; and c) inserting in the bit stream position, brightness and chrominance values of the peaks of meshes whereof the brightness variation is higher than a threshold variation. The invention is useful for encoding fixed or animated images with speed reduction (compression).
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2.发明公开
公开(公告)号：EP1413140A1
公开(公告)日：2004-04-28
申请号：EP00988902.3
申请日：2000-12-07
IPC分类号： H04N7/26
CPC分类号： H04N19/186 , H04N19/54
摘要： The invention relates to a method for estimating the motion between two digital images and to the use of this method for coding images. The aim of the method is to eliminate the disturbances caused by the mesh being overturned during the motion estimation process. According to the invention, the method consists of carrying out a first motion estimation in order to identify the faulty mesh, i.e. the mesh that is overturning or is overlapping after the displacement vectors have been applied; then carrying out a second motion estimation, excluding at least said faulty mesh, in order to minimise prediction error on the remaining mesh of the model.
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3.发明授权
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4.发明授权
公开(公告)号：EP1413140B1
公开(公告)日：2006-09-27
申请号：EP00988902.3
申请日：2000-12-07
IPC分类号： H04N7/26
CPC分类号： H04N19/186 , H04N19/54
摘要： The invention relates to a method for estimating the motion between two digital images and to the use of this method for coding images. The aim of the method is to eliminate the disturbances caused by the mesh being overturned during the motion estimation process. According to the invention, the method consists of carrying out a first motion estimation in order to identify the faulty mesh, i.e. the mesh that is overturning or is overlapping after the displacement vectors have been applied; then carrying out a second motion estimation, excluding at least said faulty mesh, in order to minimise prediction error on the remaining mesh of the model.
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