Canon Kabushiki Kaisha

Yushi Kaneko

Akihiro Shikakura

Nobuhiro Hoshi

Masashi Kawakami

Daisuke Sakamoto

Eishi Takeda

Masahiko Enari

Shinichi Yamashita

Akio Fujii

Yasutomo Suzuki

Hiroyuki Kimura

Masafumi Wataya

Toshiyuki Yanaka

Mitsuru Owada

Hiroshi Takizawa

An image processing apparatus which calculates a code amount obtained upon coding a coding block being obtained by dividing an image to be processed, determines an assigned code amount to be assigned to each of the coding blocks, based on a reference code amount and the code amount calculated for each of coding blocks in a coding group including a plurality of coding blocks, and generates coded data by coding each of the coding blocks using the assigned code amount as a target code amount, wherein the assigned code amount is determined so that a total of the assigned code amounts of the coding blocks in the coding group is the same among a plurality of coding groups, and fixed-length coding is carried out on a coding group-by-coding group basis by coding using the determined assigned code amounts.

Image processing apparatus, image processing method, and non-transitory computer-readable storage medium

This invention provides a technique of efficiently encoding image data while especially suppressing a decrease in resolution caused by a difference in illuminance. An encoding apparatus includes a transforming unit which performs discrete wavelet transform for image data to be encoded up to preset decomposition level n (n&#x2265;2) to generate a plurality of sub-bands, a quantizing unit which quantizes coefficient data in the sub-bands of the respective decomposition levels, and an encoding unit which encodes the coefficient data. The quantizing unit quantizes each sub-band of decomposition level n based on a quantization parameter set for each sub-band, and quantizes each sub-band of decomposition level n&#x2212;1 or less based on a quantization parameter set for each sub-band and a weighting coefficient dependent on coefficient data of a sub-band LL of decomposition level n.

Image encoding apparatus, image decoding apparatus, and control methods therefor

An image processing apparatus comprising, an acquiring unit configured to acquire an encoding target block having a plurality of groups each including a predetermined number of pixels, a deciding unit configured to decide for each group a quantization parameter used to quantize image data of the group and an encoding scheme so that a code length of the encoding target block does not exceed a predetermined value, and an encoding unit configured to generate encoded data by encoding image data of the encoding target block in accordance with the quantization parameters and the encoding schemes decided for the respective groups by the deciding unit.

Image processing apparatus and image processing method

An image processing apparatus comprising an acquiring unit configured to acquire an encoding target block having a plurality of groups each including a predetermined number of pixels, a deciding unit configured to decide for each group a quantization parameter used to quantize image data of the group and an encoding scheme so that a code length of the encoding target block does not exceed a predetermined value, wherein the deciding unit selects, as the encoding scheme of a respective group, either of a first encoding scheme that outputs quantized image data and a second encoding scheme that outputs encoded data of a differential between quantized image data and prediction data, and an encoding unit configured to generate encoded data by encoding image data of the encoding target block in accordance with the quantization parameters and the encoding schemes decided for the respective groups.

Image processing apparatus and image processing method using improved predictive encoding techniques

An image processing apparatus comprising an acquisition unit inputs image data, and outputs image data of blocks comprising a plurality of groups each including a predetermined number of pixels, wherein the acquisition unit changes an order of the image data so that arrangements of pixels between adjacent blocks are opposite, a deciding unit decides, for each of the groups, a quantization parameter, that is used for quantization of image data of the group, and an encoding scheme such that a code length of the blocks, which are encoding targets, does not exceed a predetermined value and an encoding unit, in accordance with the quantization parameters and encoding schemes decided for each group by the deciding unit, encodes the image data of the encoding target blocks output from the acquisition unit to generate encoded data.

Image encoding apparatus and image encoding method

An image processing apparatus has a plurality of optical systems arranged two-dimensionally and a plurality of photoelectric conversion elements which are two-dimensionally arranged for each of the plurality of optical systems and are used to photoelectrically convert an image from each optical system, and inter-frame prediction encodes a plurality of image frames each having a different parallax, which are formed by the plurality of photoelectric conversion elements.

Image processing apparatus, image processing method and program, and imaging apparatus

An apparatus detects a motion vector using image data to be encoded, and a plurality of reference image data. The apparatus conducts a motion vector search for first reference image data using a large block obtained by dividing the image data to be encoded, and divides the large block into a smaller block size at the position of a smallest matching error. The apparatus determines a block size used in a motion vector search for another reference data based on matching errors in the small blocks.

Image encoding apparatus and method for allowing motion vector detection

An imaging device includes a first detection unit, a vector correction unit, and a second detection unit. The first detection unit is configured to detect a motion vector based on reference image data and input image data after aberration of a lens is corrected. The vector correction unit is configured to correct an error component included in the motion vector detected by the first detection unit according to an aberration characteristic of the lens. The error component is produced by aberration correction. The second detection unit is configured to set a search area of the motion vector based on the motion vector corrected by the vector correction unit and detect the motion vector in the search area.

Imaging device detecting motion vector

Motion vector detection apparatus, motion vector detection method, image encoding apparatus, image encoding method, and computer program

In an encoding apparatus or method, variable-length encoding data is packetized by a packetizing format in which a header of a packet has an area for indicating a packet length and the range of values indicating the packet length is limited. Variable-length encoding data is input and the data length of the variable-length encoding data is detected. According to the detection result, the input variable-length encoding data is packetized within the packet-length maximum value which can be specified in the header.

Encoding apparatus, encoding method, and recording medium storing encoding processing program

An image processing apparatus comprises a receiving device for receiving encoded image data which is encoded by using orthogonal transform in a predetermined block unit, an error detecting device for detecting a transmission error of the encoded image data, a correcting device for correcting the transmission error in the predetermined block unit, and a decoding device for decoding the encoded image data and outputting image data for reproducing an image. The image processing apparatus satisfactorily controls the amount of compressed data and prevents a deterioration of image quality even if any error occurs on a transmission path, thereby reproducing good image quality.

Error correction and concealment technique

An image processing system having an input/output unit for inputting or outputting a video signal, and a scanner for reading an original image or a printer for printing the video signal, in which the aspect ratio of the image is converted at the input or output of the video signal between the input/output unit and the scanner or the printer.

Image processing system converting the pixel aspect ratio

An information processing method an apparatus are described in which several items of information to be transmitted efficiently within a given frequency band to different receivers. The items of information are multiplexed and used to modulate a carrier whose central frequency is set according to the number of items of information that are multiplexed.

Growing community of inventors

Kawasaki, Japan

Yushi Kaneko