Other

Hyundai Electronics Industries Co. Ltd.

Hyundai Electronics Ind. Co., Ltd.

Pantech & Curitel Communications, Inc.

Telecommunications Research Institute

Hae Kwang Kim

Joo Hee Moon

Joo-Hee Moon

Cheol Soo Park

Ji-Heon Kweon

Chel-Soo Park

Nam Kyu Kim

Jong Deuk Kim

Dong Gyu Sim

Mun Churl Kim

Jin Woong Kim

A method and apparatus for extracting chrominance shape information for an interlaced scan type image, which are used in a video compression coding/decoding system or a video manipulation equipment/system. According to the present invention, in an interlaced scan type image with arbitrary luminance shape information, chrominance shape information is extracted on the basis of four adjacent luminance shape pixels in two lines of the same type field. The present method and apparatus can solve a color bleeding problem in a conventional chrominance shape information extraction method considering no characteristic of the interlaced scan type image. Therefore, the present invention has the effect of significantly improving subjective picture quality.

Method and apparatus for extracting chrominance shape information for interlaced scan type image

The present invention relates to an apparatus and a method for vector descriptor representation and multimedia data retrieval, which can quantize a plurality of feature values described by a vector descriptor respectively, represent the quantized feature values in the form of bit or orthogonally transform the quantized bector feature values, and rearrange the feature values represented in the form of bit from the highest bit to the lowest bit or rearrange the transformed coefficient from low frequency to high frequency to represent the vector descriptor hierarchically. Moreover, when retrieving multimedia data, the present invention can code in variable length and store the rearranged feature values and the number of feature values which are input, inversely code only the feature values corresponding to the number of the feature values of the stored feature values, inversely arrange the inversely coded feature values to be restored to original feature values, inversely quantize the restored feature values, and compare the feature values restored by the inverse quantization with the feature values stored in a multimedia database to retrieve multimedia data.

Apparatus and method for vector descriptor representation and multimedia data retrieval

An image chrominance signal filtering method and apparatus in which object chrominance information and background chrominance information are extracted in an image format conversion process, based on shape information of luminance signals, and then decimation-filtered or interpolation-filtered. In accordance with the method and apparatus of the present invention, it is possible to avoid a color bleeding phenomenon occurring at the boundaries of objects in an image. Accordingly, there is an advantage in that a degradation in picture quality is prevented.

Method and apparatus for filtering chrominance signals of image

Disclosed is a method and apparatus for searching a human three-dimensional (3D) posture which can rapidly and accurately search a human 3D posture by effectively representing the human 3D posture with a small amount of data. According to the method, a posture database is established by extracting posture descriptors using relation among respective joints of a body, and a feature of a query 3D posture is simultaneously extracted in the same manner. Then, the similarity is calculated by comparing the posture descriptor of the query 3D posture with the posture descriptors of postures in the posture database, and then outputted to search the human 3D posture.

Method and apparatus for searching human three-dimensional posture

A method and apparatus for generating a bounding rectangle of a VOP for interlaced scan type video signals, which are capable of accurately generating a bounding rectangle, thereby preventing a color bleeding from occurring in the field-based chrominance shape subsampling. The method includes bounding rectangle formation step of forming a bounding rectangle of a video object plane in such a fashion that the bounding rectangle contains an object therein, based on input luminance shape information, optimum setting determination step of determining whether or not a spatial reference point of the bounding rectangle is positioned on an x-y coordinate of coordinate value (2m, 4n) (m and n&equals;0, 1, 2, 3, 4, . . . ), and bounding rectangle adjustment step of varying the bounding rectangle, when it is determined at the optimum setting determination step that the spatial reference point of the bounding rectangle is not positioned on the x-y coordinate of coordinate value (2m, 4n), in such a fashion that the spatial reference point of the bounding rectangle is positioned on an x-y coordinate of coordinate value (2m, 4n).

Method and apparatus for generating a bounding rectangle of a VOP for interlaced scan type video signals

A method of coding/decoding image information is derived to perform a boundary block merge of the macro blocks of the image information and copy the DCT coefficients of a block that is converted to an exterior block from a boundary one out of left-sided and upper-sided blocks for the use purpose in performing a prediction of the DCT coefficients of the block's sub blocks, thus enhancing the efficiency of a coding/decoding process.

Method of coding/decoding image information

A device for coding/decoding image information is provided to perform a boundary block merge of macro blocks of image information. Further, the DCT coefficients of a block are copied, if that is converted to an exterior block from a boundary block out of left-sided and upper-sided blocks for the purpose of performing a prediction of the DCT coefficients of the block's sub blocks. Thus, the efficiency of a coding/decoding process is enhanced.

Growing community of inventors

Seoul, South Korea

Hae Kwang Kim