Canon Kabushiki Kaisha

Nissan Motor Company Limited

Tadayoshi Nakayama

Katsuji Yoshimura

Chikara Sato

Koji Takahashi

Kenichi Nagasawa

Susumu Kozuki

Tomohiko Sasatani

Hisashi Ishikawa

Yoshitake Nagashima

Hidefumi Osawa

Yoshihiro Nakatani

Nobutaka Miyake

Naoki Ito

Tsutomu Fukatsu

Shinichi Kato

Yuji Konno

Ken-ichi Ohta

Hisataka Hirose

Takeshi Yamazaki

Hiroyuki Kimura

Hiroshi Kajiwara

Hiromi Fukuda

Masahiro Takei

Teruo Hieda

Yoshinobu Mita

Toshiyuki Masui

Hiroto Yasumura

Koki Mitsunami

Akio Fujii

Takashi Saito

Hiroo Edakubo

Toru Aida

Hiroki Kishi

Norihiro Kawahara

Tetsurou Kitashou

Kyoji Tamura

Ken Onodera

Joji Oki

Hidekazu Tominaga

Kazuhide Hasegawa

Masahiko Mizoguchi

Koichi Honma

Reiko Fujino

Chikara Satoh

Toshiyuki Masu

Ohikara Sato

The invention realizes, with a circuit size having a small number of multipliers, one-dimensional cubic interpolation, which is a primitive calculation of two-dimensional bicubic interpolation that is often used as high image quality interpolation processing of images. An image processing apparatus includes a first linear interpolation calculator that generates an interpolated pixel value at an interpolation position through linear interpolation, based on pixel values of a pair of pixels among a plurality of pixels, a plurality of second linear interpolation calculators that generate a plurality of correction values by respectively performing linear interpolation based on a pair of difference values among a plurality of difference values between pixel values of the plurality of pixels, and a calculator that generates a pixel value at the interpolation position based on the interpolated pixel value and the plurality of correction values.

Image processing apparatus and method for controlling the same

An image processing device that transforms an image includes a storage unit configured to store coordinate values in a coordinate system of a pre-transformed image, each of the coordinate value corresponding to a grid point in a coordinate system of a transformed image, a selection unit configured to select a grid point in the vicinity of a target pixel in the transformed image, a calculation unit configured to refer to the pre-transformed coordinate value, corresponding to the selected grid point and stored in the storage unit, and to calculate a pre-transformed coordinate value corresponding to the target pixel, using the referred coordinate value, and an output unit configured to output a pixel value of the coordinate value calculated in the pre-transformed image, as a pixel value of the target pixel in the transformed image.

Device for performing image transformation processing and method thereof

An information processing apparatus includes an acquisition unit configured to acquire a first phase signal and a second phase signal that are acquired by measuring a rotation of a moving object, and a calculation unit configured to calculate a rotational angle by an iterative calculation so as to satisfy a relational expression bearing an arctangent. The relational expression bearing the arctangent uses a first cosine wave and a second cosine wave at a higher harmonic of the first cosine wave for the first phase signal, and a first sine wave and a second sine wave at a higher harmonic of the first sine wave for the second phase signal. The first phase signal and the second phase signal may, for example, be analog signals having a wave shape.

Information processing apparatus, and recording medium storing computer program

An arithmetic apparatus comprises a plurality of cascade-connected arithmetic units. Each of the plurality of arithmetic units comprises: a calculator configured to operate in one of a rotation mode of performing a rotation calculation, and a vectoring mode of calculating a rotation angle; and a holding unit configured to hold rotational direction information output from the calculator in the vectoring mode. In addition, when operating in the rotation mode, the calculator performs the rotation calculation on data input from an arithmetic unit in a preceding stage, based on the rotational direction information held in the holding unit.

Arithmetic apparatus and control method of the same using cordic algorithm

When deducing a homography matrix representing a geometrical relationship between two images, an image processing apparatus obtains a transformation matrix for four feature points in each of the two images based on reference coordinates. More specifically, the apparatus obtains the area of a triangle formed by three out of the four feature points, and calculates projective parameters of transformation matrices from the area ratios. The apparatus calculates the homography matrix between the images by the product of one of the two obtained matrices and an inverse matrix of the other.

Information processing apparatus, control method of the same, and video camera

This invention decreases the count of access to a memory which stores image data regarding orthogonal transform, and quickly generates orthogonal transform coefficients. An apparatus includes a storage unit which stores image data, a memory controller which reads each block from the storage unit, a first transforming unit which receives and orthogonally transforms the input block, and calculates only one DC component, a selector which selects and outputs one of the block read out via the memory controller, and data of DC components from the first transforming unit that are equal in number to pixels included in the block, a second transforming unit which orthogonally transforms data that have been output from the selector and are equal in number to pixels included in the block, and outputs either one DC component or a plurality of AC components, and a controller which controls the memory controller, selector, and second transforming unit.

Data transform apparatus

An image processing apparatus includes a noise reduction unit configured to nonlinearly convert a signal obtained by subtracting a value of a subtraction image signal, which is read from a memory, from that of a current-frame image signal, to generate a noise-reduced signal by subtracting the nonlinearly converted signal from the current-frame image signal, and to store the noise-reduced signal in the memory, a read unit configured to read the subtraction image signal from the memory at a moment between a moment, at which the subtraction image signal read from the memory is stored in the memory, and a moment at which the subtraction image signal is read from the memory, and a generation unit configured to generate an image based on the subtraction image signal read by the read unit.

Image processing apparatus, image processing method, and program

A bumper is provided with to-be-engaged projections, a radiator grille is provided with engaging projections. The radiator grille is allowed to move and approach bumper rearward of a vehicle. According to this configuration, the engaging projections engage the to-be-engaged projections and they are engaged with and fixed to each other. At this time, a bumper-side seizing unit of the bumper is fitted into a grille-side seizing unit of the radiator grille, thereby limiting the vertical direction. In an engaged state between the engaging projections and the to-be-engaged projections, an inclining surface of one of the engaging projections comes into contact with a rearward inclining surface of the one of the to-be-engaged projections, and an inclining surface of the other engaging projection is separated from a rearward inclining surface of the other to-be-engaged projection.

Engaging and fixing structure

A data transform apparatus transforms four integer data D-Dinto one DC coefficient Yand three AC coefficients Y-Yas lossless-Hadamard transform coefficients. A first calculation unit group adds date Dto respective data Dto D. A first shifter shifts data D1 bit to the left. A second calculation unit group subtracts three data calculated by the first calculation unit group from output of the shifter. A second shifter halves a calculation result of the second calculation unit group by shifting the subtraction result 1 bit to the right, and executes round processing for truncating a fractional part of the halved data. A sign inverter inverts the sign of output from the second shifter, and outputs it as DC coefficient. A third calculation unit group subtracts output from the sign inverter from output of the first calculation unit group, and outputs these data as AC coefficients.

Data transform apparatus and control method thereof

Engaging and fixing structure and engaging and fixing method

An image processing apparatus includes a feedback unit configured to perform first nonlinear conversion of a signal obtained by subtracting a value of a subtraction image signal from that of a current-frame image signal, and to obtain the next subtraction signal by subtracting a signal obtained by performing the first nonlinearly conversion from the current-frame image signal, and a noise reduction unit configured to perform second nonlinear conversion of a signal obtained by subtracting a value of the subtraction image signal from that of the current-frame image signal, and to obtain an output image signal by subtracting a signal obtained by performing the second nonlinear from the current-frame image signal.

Image processing apparatus and image processing method

This invention implements a fast lossless transform almost free from a delay with a small calculation amount. The lossless transform can be used to perform lossless coding and lossy coding quickly. A first calculation unit multiplies data D, D, D, and Dinput to the input terminals by respective weighting coefficients {a, a, a, a} of {&#xbd;, &#x2212;&#xbd;, &#x2212;&#xbd;, &#x2212;&#xbd;}, and summates the products. A rounding unit in the first calculation unit rounds the sum into an integer and outputs the integer value E. A second calculation unit multiplies the value E by weighting coefficients {b, b, b, b} of {&#x2212;1, 1, 1, 1} set for the respective input data, and adds the products to the respective input data. This invention sets, for the relationship between the first and second weighting coefficients, a condition that a*b+a*b+a*b+a*b=&#x2212;2 or 0.

Data transforming apparatus and control method thereof

A lossless encoding processing unit lossless-encodes respective tiles, and stores the encoded data in a memory. A determination unit determines, according to attribute information of each tile, whether the tile of interest is to be lossless- or lossy-encoded, and appends the determination result at the head of lossless-encoded data as a flag. The determination unit counts, in variable CH, the number of tiles determined to be lossy-encoded, during the lossless encoding processing. Every time the CH exceeds one of a plurality of different thresholds, a lossy encoding processing unit decodes lossless-encoded data appended with a lossy flag, applies processing for decreasing the resolution to the decoded data, lossless-encodes the data that has undergone the processing again, and stores the lossless-encoded data in the memory. Upon completion of the lossless encoding processing for one page, the lossy encoding processing unit lossy-encodes the lossless-encoded data appended with the lossy flag.

Image encoding apparatus and control method thereof

This invention provides a lossless 4-point Hadamard transform circuit which can minimize the number of times of addition/subtraction calculations, and reduce the number of times of round processing required to convert data including a fractional part into an integer. To this end, a DC coefficient generating unit summates four input data, and shifts the summation result 1 bit to the right to halve the summation result and to round the halved result by truncating a fractional part of the result. This 1-bit shift right result is output as a DC coefficient. An intermediate data generating unit generates, as intermediate value, a difference value between one input data of the four input data and the DC coefficient obtained by the DC coefficient generating unit. An AC coefficient generating unit generates three AC coefficients by adding the intermediate data generated by the intermediate data generating unit to other three input data.

A data transform processing apparatus comprising a first lossless transform circuit to perform two step ladder operation processings of receiving unweighted normalized data then outputting weighted nonnormalized rotation-transformed data, and a second lossless transform circuit to perform two step ladder operation processings of receiving the weighted nonnormalized rotation-transformed data from the first lossless transform circuit then performing inverse weighting and outputting unweighted normalized rotation-transformed data, wherein the outputs from the first lossless transform circuit are interchanged and supplied to the second lossless transform circuit.

Data transform processing apparatus and method

Growing community of inventors

Tokyo, Japan

Tadayoshi Nakayama