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1. 发明授权

US11432012B2 Method and apparatus for encoding and decoding digital images or video streams 有权
公开(公告)号：US11432012B2
公开(公告)日：2022-08-30
申请号：US16488851
申请日：2018-03-02
申请人： SISVEL TECHNOLOGY S.R.L.
发明人： Marco Grangetto , Francesco Verdoja
IPC分类号： H04N19/61 , H04N19/124 , H04N19/176 , H04N19/91 , H04N19/44
摘要： A method for encoding digital images or video streams, includes a receiving phase, wherein a portion of an image is received; a graph weights prediction phase, wherein the elements of a weights matrix associated to the graph related to the blocks of the image (predicted blocks) are predicted on the basis of reconstructed, de-quantized and inverse-transformed pixel values of at least one previously coded block (predictor block) of the image, the weights matrix being a matrix comprising elements denoting the level of similarity between a pair of pixels composing said image, a graph transform computation phase, wherein the graph Fourier transform of the blocks of the image is performed, obtaining for the blocks a set of coefficients determined on the basis of the predicted weights; a coefficients quantization phase, wherein the coefficients are quantized an output phase wherein a bitstream comprising the transformed and quantized coefficients is transmitted and/or stored.

2. 发明授权

US11012692B2 Apparatuses and methods for encoding and decoding images 有权
公开(公告)号：US11012692B2
公开(公告)日：2021-05-18
申请号：US15768450
申请日：2016-10-13
申请人： SISVEL TECHNOLOGY S.R.L.
发明人： Giulia Fracastoro , Enrico Magli
IPC分类号： H04N19/12 , H04N19/625 , H04N19/176 , H04N19/147 , H04N19/122 , H04N19/139 , H04N19/18 , H04N19/196 , H04N19/61
摘要： A method and an apparatus are provided for encoding and/or decoding digital images or video streams. The encoding apparatus includes a processor configured for reading at least a portion of an image (f), determining a rotation angle (θ) on the basis of the portion of the image (f), determining rotated transform matrix (V′) which is the result of a rotation of at least one basis vector of a Discrete Cosine Transform matrix (V) by the rotation angle (θ), computing transformed coefficients (f{circumflex over ( )}) on the basis of the pixel values contained in the portion of the image (f) and the rotated transform information (V′), outputting the transformed coefficients (f{circumflex over ( )}) to the destination.

3. 发明授权

US10708601B2 Methods and apparatuses for encoding and decoding superpixel borders 有权
公开(公告)号：US10708601B2
公开(公告)日：2020-07-07
申请号：US16488879
申请日：2018-03-02
申请人： SISVEL TECHNOLOGY S.R.L.
发明人： Marco Grangetto , Francesco Verdoja
IPC分类号： H04N19/00 , H04N19/167 , H04N19/103 , H04N19/182 , G06T15/00 , G06T17/00
摘要： The present invention relates to a method for encoding the borders of pixel regions of an image, wherein the borders contain a sequence of vertices subdividing the image into regions of pixels (superpixels), by generating a sequence of symbols from an alphabet including the step of: defining for each superpixel a first vertex for coding the borders of the superpixel according to a criterion common to all superpixels; defining for each superpixel the same coding order of the border vertices, either clockwise or counter-clockwise; defining the order for coding the superpixels on the base of a common rule depending on the relative positions of the first vertices; defining a set of vertices as a known border, wherein the following steps are performed for selecting a symbol of the alphabet, for encoding the borders of the superpixels: a) determining the first vertex of the next superpixel border individuated by the common criterion; b) determining the next vertex to be encoded on the basis of the coding direction; c) selecting a first symbol (“0”) for encoding the next vertex if the next vertex of a border pertains to the known border, d) selecting a symbol (“1”; “2”) different from the first symbol (“0”) if the next vertex is not in the known border; e) repeating steps b), c), d) and e) until all vertices of the superpixel border have been encoded; f) adding each vertex of the superpixel border that was not in the known border to the set; g) determining the next superpixel whose border is to be encoded according to the common rule, if any; i) repeating steps a)-g) until the borders of all the superpixels of the image have being added to the known border.

4. 发明申请

US20200014937A1 Methods and Apparatuses for Encoding and Decoding Superpixel Borders 审中-公开
公开(公告)号：US20200014937A1
公开(公告)日：2020-01-09
申请号：US16488879
申请日：2018-03-02
申请人： SISVEL TECHNOLOGY S.R.L.
发明人： Marco GRANGETTO , Francesco VERDOJA
IPC分类号： H04N19/167 , H04N19/182 , H04N19/103
摘要： The present invention relates to a method for encoding the borders of pixel regions of an image, wherein the borders contain a sequence of vertices subdividing the image into regions of pixels (superpixels), by generating a sequence of symbols from an alphabet including the step of: defining for each superpixel a first vertex for coding the borders of the superpixel according to a criterion common to all superpixels; defining for each superpixel the same coding order of the border vertices, either clockwise or counter-clockwise; defining the order for coding the superpixels on the base of a common rule depending on the relative positions of the first vertices; defining a set of vertices as a known border, wherein the following steps are performed for selecting a symbol of the alphabet, for encoding the borders of the superpixels: a) determining the first vertex of the next superpixel border individuated by the common criterion; b) determining the next vertex to be encoded on the basis of the coding direction; c) selecting a first symbol (“0”) for encoding the next vertex if the next vertex of a border pertains to the known border, d) selecting a symbol (“1”; “2”) different from the first symbol (“0”) if the next vertex is not in the known border; e) repeating steps b), c), d) and e) until all vertices of the superpixel border have been encoded; f) adding each vertex of the superpixel border that was not in the known border to the set; g) determining the next superpixel whose border is to be encoded according to the common rule, if any; i) repeating steps a)-g) until the borders of all the superpixels of the image have being added to the known border.

5. 发明授权

US10175053B2 Method for managing a map of a personal navigation device and device thereof 有权
公开(公告)号：US10175053B2
公开(公告)日：2019-01-08
申请号：US14346245
申请日：2012-09-21
申请人： SISVEL TECHNOLOGY S.R.L.
发明人： Saverio Celia
IPC分类号： G01C21/34 , G06F17/30 , G01C21/32
摘要： A method for managing a map (140) stored in a memory (130) associated with a personal navigation device (10), including a command and data entry unit (115) operable by a user, wherein the map (140) can be visualized on a display (115) and includes a road network, the method including the step of combining a first set of data about the road network, stored in the map (140), with a second set of data about at least one road not present in the road network or defined as not viable, in particular a new road, wherein the second data can be entered by the user by the command and data entry unit (115).

6. 发明申请

US20180278957A1 Methods and Apparatuses for Encoding and Decoding Digital Images Through Superpixels 审中-公开
公开(公告)号：US20180278957A1
公开(公告)日：2018-09-27
申请号：US15762496
申请日：2016-09-23
申请人： SISVEL TECHNOLOGY S.R.L. , POLITECNICO DI TORINO
发明人： Giulia Fracastoro , Enrico Magli , Francesco Verdoja , Marco Grangetto
IPC分类号： H04N19/60 , H04N19/17 , G06K9/34 , G06T7/11 , H04N19/182
CPC分类号： H04N19/60 , G06K9/34 , G06K9/6224 , G06T7/11 , H04N19/17 , H04N19/182
摘要： A method and an apparatus for encoding and/or decoding digital images or video streams are provided, wherein the encoding apparatus includes a processor configured for reading at least a portion of the image, segmenting the portion of the image in order to obtain groups of pixels identified by borders information and containing at least two pixels having one or more homogeneous characteristics, computing, for each group of pixels, a weight map on the basis of the borders information associated to the group of pixels, a graph transform matrix on the basis of the weight map, and transform coefficients on the basis of the graph transform matrix (U) and of the pixels contained in the group of pixels.

7. 发明申请

US20220284298A1 METHOD AND APPARATUS FOR PRUNING NEURAL NETWORKS 有权
公开(公告)号：US20220284298A1
公开(公告)日：2022-09-08
申请号：US17769707
申请日：2020-10-06
申请人： SISVEL TECHNOLOGY S.R.L. , INSTITUT MINES TÉLÉCOM
发明人： Enzo TARTAGLIONE , Marco GRANGETTO , Francesco ODIERNA , Andrea BRAGAGNOLO , Attilio FIANDROTTI
IPC分类号： G06N3/08
摘要： The present invention relates to a method for pruning a neural network comprising a plurality of neurons, said method comprising: an initialization phase, wherein input information is fetched comprising at least parameters ({wni,bni}) related to said neural network and a dataset (D) representative of a task that said neural network has to deal with, wherein said parameters ({wni,bni}) comprising a weights vector (wni) and/or a bias (bni) related to at least one neuron of said plurality of neurons; a regularization phase, wherein said neural network is trained according to a training algorithm by using said dataset (D); a thresholding phase, wherein an element (wnij) of said weights vector (wni) is put at zero when its absolute value is below a given threshold (T).

8. 发明授权

US10609373B2 Methods and apparatus for encoding and decoding digital images or video streams 有权
公开(公告)号：US10609373B2
公开(公告)日：2020-03-31
申请号：US15759631
申请日：2016-09-16
申请人： SISVEL TECHNOLOGY S.R.L. , POLITECNICO DI TORINO
发明人： Giulia Fracastoro , Enrico Magli
IPC分类号： H04N19/126 , H04N19/14 , H04N19/176 , H04N19/182 , H04N19/60 , H04N19/12 , H04N19/463 , H04N19/90
摘要： Methods and apparatuses for encoding and/or decoding digital images or video streams, wherein the encoding apparatus includes a processor configured for reading a portion of the image (f), computing difference values between pixel values of the image, quantizing such pixel difference values for obtaining a quantized weight map (W), computing an edge map (f′) composed by elements (f′i) indicating whether a corresponding pixel of the portion of the image is an edge or not on the basis of the quantized weight map, determining a reconstructed weight map (W′) on the basis of the edge map (f′), determining a graph transform matrix (U) on the basis of the reconstructed weight map (W′), computing transform coefficients (f{circumflex over ( )}) on the basis of the graph transform matrix (U) and said portion of the image (f), transmitting the computed transform coefficients (f{circumflex over ( )}) and the edge map (f′).

9. 发明授权

US10559961B2 Method and apparatus for managing electric energy produced locally for self-consumption and distributed to multiple users belonging to one or more communities of users 有权
公开(公告)号：US10559961B2
公开(公告)日：2020-02-11
申请号：US14377801
申请日：2013-03-01
申请人： SISVEL TECHNOLOGY S.R.L.
发明人： Alessandro Striuli
IPC分类号： H02J4/00 , H02J3/46 , G05B15/02
摘要： A method for managing the supply of electric energy to a community of users (UP1, UP2, . . . UPN) includes determining a supply, to each user of the community of users (UP1, UP2, . . . UPN), of a combination of electric energy coming from at least one system for producing energy from a local source (100) and from the at least one system for supplying energy managed by an external distributor (110), wherein the combination of electric energy can be determined specifically for each user; adjusting, for each user of the community of users, the supply of the fraction of electric energy coming from the local source (100), as a function of the electric energy coming from the local source (100) to be distributed to the other users of the community of users (UP1, UP2, . . . UPN), so as to give priority to taking electric energy directly from the system for producing energy from a local source (100) over the at least one system for supplying electric energy managed by an external distributor (110).

10. 发明申请

US20200014955A1 Method and Apparatus for Encoding and Decoding Digital Images or Video Streams 审中-公开
公开(公告)号：US20200014955A1
公开(公告)日：2020-01-09
申请号：US16488851
申请日：2018-03-02
申请人： SISVEL TECHNOLOGY S.R.L.
发明人： Marco GRANGETTO , Francesco VERDOJA
IPC分类号： H04N19/61 , H04N19/176 , H04N19/44 , H04N19/124 , H04N19/91
摘要： A method for encoding digital images or video streams, includes a receiving phase, wherein a portion of an image is received; a graph weights prediction phase, wherein the elements of a weights matrix associated to the graph related to the blocks of the image (predicted blocks) are predicted on the basis of reconstructed, de-quantized and inverse-transformed pixel values of at least one previously coded block (predictor block) of the image, the weights matrix being a matrix comprising elements denoting the level of similarity between a pair of pixels composing said image, a graph transform computation phase, wherein the graph Fourier transform of the blocks of the image is performed, obtaining for the blocks a set of coefficients determined on the basis of the predicted weights; a coefficients quantization phase, wherein the coefficients are quantized an output phase wherein a bitstream comprising the transformed and quantized coefficients is transmitted and/or stored.

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