Mitsubishi Electric Corporation

Daiki Kudo

Hirofumi Nishikawa

Yoshiaki Kato

Yoshihisa Yamada

Shunichi Sekiguchi

Kazuo Sugimoto

Yusuke Itani

Koichi Takeuchi

Junichi Kitsuki

An intra-scene and inter-scene adaptive coding unitconverts an MPEG-2 video bit stream into a slave stream by using both coded data which is included in the coded data about scene video units in a master stream recorded in a data recording unitand for which alternative coded data to be used for prediction reference has not been retrieved by an inter-scene prediction determining unit, and coded data retrieved by the inter-scene prediction determining unitfor the prediction reference.

Image coding device, image decoding device, image coding method, and image decoding method

An image discrimination apparatus includes an inter-frame distance calculating unitfor calculating an inter-frame distance which is a distance between features from the feature of a current frame extracted by a feature extracting unitand the feature of an immediately-preceding frame stored in a feature buffer, and a cut-point-determination data calculating unitfor calculating statistics values of inter-frame distances and calculating a threshold for determination of cut points from the statistics values. The image discrimination apparatus compares the inter-frame distance of the current frame with the threshold for determination of cut points to determine a cut point from the comparison result.

Image discrimination apparatus

An image encoding apparatus includes a converterfor receiving an image signal, and for converting the image signal of individual blocks to DC components and AC components by orthogonal transformation of the individual blocks of an image frame; a predicted reference value generatorfor receiving the image signal, and for generating a predicted reference value of each image frame from DC components resulting from the orthogonal transformation of left-edge blocks of the image frame; and a differential unitfor obtaining difference values between the DC components output from the converterand the predicted reference value generated by the predicted reference value generator. The image encoding apparatus outputs a bit stream by quantizing and variable-length encoding the AC components and difference values obtained by the differential unit, and by quantizing and variable-length encoding the predicted reference value to be added to a header.

Image encoding apparatus and image decoding apparatus

Each of an image retrieval method and an image retrieval device in accordance with the present invention is provided with a means for extracting a color layout feature quantity, a dominant color feature quantity, a region division feature quantity, and a shape feature quantity from a query image which is a key of retrieval, and a means for specifying a region of interest of the image by carrying out mutual use of the above-mentioned feature quantities.

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Tokyo, Japan

Daiki Kudo