摘要:
A compression and decompression system in which a reversible wavelet filter are used to generates coefficients from input data, such as image data. The reversible wavelet filter is an efficient transform implemented with integer arithmetic that has exact reconstruction. The present invention uses the reversible wavelet filter in a lossless system (or lossy system) in which an embedded codestream is generated from the coefficients produced by the filter. An entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
摘要:
A method and apparatus for encoding and decoding data that includes generating transformed signals in response to input data. In one embodiment, the transformed signals are generated using a reversible wavelet transform. The present invention also includes a method and apparatus for compressing the transform signals into data representing a losslessly compressed version of the input data. In one embodiment, the present invention decomposes the input data using reversible wavelet transforms.
摘要:
A compression and decompression system in which a reversible wavelet filter are used to generates coefficients from input data, such as image data. The reversible wavelet filter is an efficient transform implemented with integer arithmetic that has exact reconstruction. The present invention uses the reversible wavelet filter in a lossless system (or lossy system) in which an embedded codestream is generated from the coefficients produced by the filter. An entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
摘要:
A method and apparatus for eliminating flicker by quantizing values based on previous quantization is described. In one embodiment, the method comprises encoding a first coefficient value in a first frame of a motion sequence and subsequently setting a second coefficient in a second frame of the motion sequence and in the same position as the first coefficient to be within a predetermined closeness with the value of the first coefficient.
摘要:
A method and apparatus for specifying quantization based upon the human visual system is described. In one embodiment, the method comprises specifying scalar quantization for application to one or more bit planes of luminance information in image data using a human visual system (HVS) weighting and quantizing bit planes of the luminance information in the image data based on specified scalar quantization.
摘要:
A method and apparatus is disclosed herein for processing document images. In one embodiment, the method comprises extracting one or more features corresponding to one or more objects from a JPM compressed file, including extracting at least one of the one or more features without decoding, ranking document objects based on a task being performed by an application, and the one or more extracted features, and selecting a set of the document objects based on rank and at least one constraint.
摘要:
A compression and decompression system in which a reversible wavelet filter are used to generates coefficients from input data, such as image data. The reversible wavelet filter is an efficient transform implemented with integer arithmetic that has exact reconstruction. The present invention uses the reversible wavelet filter in a lossless system (or lossy system) in which an embedded codestream is generated from the coefficients produced by the filter. An entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
摘要:
Method and apparatus for recording associations with logs are described. In one embodiment, the method comprises obtaining a first media identifier corresponding to a first media; accessing a log that contains one or more entries that associate two or more media identifiers with each other; and determining that the first media is related to a second media based on the log indicating that a second media identifier is associated with, but different from, the first media identifier.
摘要:
A method and apparatus for using layout objects or layers are described. In one embodiment, the method comprises accessing information in a JPM file having a plurality of layout objects and generating at least one image using the plurality of layout objects, wherein a first set of at least one of the layout objects of the plurality of layout objects in the image occludes a second set of one or more layout objects in the plurality of layout objects.
摘要:
A method and apparatus for processing JPM files having layout objects and sideband information is described. In one embodiment, the method comprises receiving a JPM file having layout objects. The layout objects include at least one layout object that represents sideband image information for a purpose other than use in display of a decoded image. The method also includes creating the decoded image by accessing information in the JPM file corresponding to the layout objects and decoding the information. The sideband image information is not intended to be displayed with the decoded image and is absent from display of the decoded image.