Ricoh Company, Ltd.

Nippon Telegraph and Telephone Corporation

Kabushiki Kaisha Toshiba

Nagoya University

Ricoh Electronic Devices Co., Ltd.

Ricoh Company Company, Ltd.

Shinya Shimizu

Hideaki Kimata

Kazuto Kamikura

Yoshiyuki Yashima

Masahiro Ishida

Naoki Matsuda

Masaki Kitahara

Yuusuke Michishita

Masayuki Tanimoto

Masahiro Matsuo

Shiori Sugimoto

Akira Kojima

Norihiko Matsuura

Kenji Yamamoto

Toshiaki Fujii

Eiji Takano

Jun Yasuda

Noriaki Funamoto

Kimiharu Yamazaki

Yohei Miura

Munekazu Date

Megumi Isogai

Yohichi Shiwaya

Shoichiro Takeda

Tsugunori Okuda

Takasuke Nagai

A camera parameter estimating device includes an obtaining unit which obtains time series frames including a plurality of subject images existing in a common field of vision shared by multiple cameras for each of the cameras, a point estimating unit which estimates the coordinates of a joint point determined in the subject image in the time-series frame for each of the subject images, a motion trajectory estimating unit which estimates the trajectory of the joint point between the time-series frames for each of the cameras, an inter-camera correspondence estimating unit which estimates a group of the trajectories between the frames obtained respectively from a pair of the cameras, and a parameter estimating unit which estimates a camera parameter for each of the cameras according to the group of trajectories.

Camera parameter estimation apparatus, camera parameter estimation method, and camera parameter estimation program

A camera parameter derivation apparatus for deriving camera parameters of a plurality of cameras for which conditions that the cameras be arranged at ideal positions that are set on a straight line at equal intervals and that directions of all arranged cameras be parallel to each other have been set includes an internal parameter derivation unit that derives internal parameter matrices of the cameras based on estimated internal parameter matrices for all cameras that are arranged at estimated positions while being oriented in estimated directions, a camera position derivation unit that derives ideal positions of the cameras that minimize the maximum of the distances between the estimated positions and the ideal positions, and a rotation matrix derivation unit that derives rotation matrices for correcting external parameters such that errors from parallel directions are equal to or less than a threshold value.

Camera parameter derivation apparatus, camera parameter derivation method, and camera parameter derivation program

An image processing apparatus includes a change detection unit configured to detect a phase change having a predetermined amount of change from phase changes in a subregion of an edge image having a predetermined resolution, a change amount adjustment unit configured to adjust the amount of change of the detected phase change, an adjusted image generation unit configured to generate an edge image having the predetermined resolution in which the amount of change of a motion change is adjusted based on the phase change in which the amount of change of the phase change is adjusted, and a region decision unit configured to decide a new subregion of an edge image having a new predetermined resolution based on the edge image having the predetermined resolution in which the amount of change of the motion change is not adjusted and the edge image having the predetermined resolution in which the amount of change of the motion change is adjusted.

Image processing apparatus, image processing method, and program

A video encoding apparatus that predictive-encodes an encoding target image included in an encoding target video. The apparatus includes a prediction device that predicts the encoding target image with reference to a previously-encoded picture as a reference picture and determines first reference information which indicates a first reference region as a reference destination; a second reference information determination device that determines, from reference information used when the first reference region was predictive-encoded, second reference information which indicates a second reference region as another reference destination for the encoding target image; and a predicted image generation device that generates a predicted image based on the second reference information, or both the first reference information and the second reference information.

Video encoding apparatus and method, and video decoding apparatus and method

A moving image encoding/decoding apparatus that performs encoding/decoding while predicting a multiview moving image including moving images of a plurality of different views includes: a corresponding region setting unit that sets a corresponding region on a depth map for an encoding/decoding target region; a region dividing unit that sets a prediction region that is one of regions obtained by dividing the encoding/decoding target region; a disparity vector generation unit that generates, for the prediction region, a disparity vector for a reference view using depth information for a region within the corresponding region that corresponds to the prediction region; a motion information generation unit that generates motion information in the prediction region from the reference view motion information based on the disparity vector for the reference view; and a prediction image generation unit that generates a prediction image for the prediction region using the motion information in the prediction region.

Moving image encoding and decoding method, and non-transitory computer-readable media that code moving image for each of prediction regions that are obtained by dividing coding target region while performing prediction between different views

An image encoding/decoding apparatus for performing encoding/decoding while predicting an image between different views using a reference image for a view different from a processing target image and a reference depth map which is a depth map for an object of the reference image when a multi-view image including images of a plurality of different views is encoded/decoded includes a reference depth region setting unit configured to set a reference depth region which is a corresponding region on the reference depth map for decoding target regions into which the processing target image is divided, and an inter-view prediction unit configured to generate an inter-view predicted image for the processing target region from the reference image using depth information in the reference depth region as depth information for the processing target region.

Image encoding method, image decoding method, image encoding apparatus, image decoding apparatus, image encoding program, and image decoding program

A drive system includes multiple vibrating members that tend to vibrate when these members are driven and a holding system to hold the multiple vibrating members. The holding system at least includes a first holding unit and a second holding unit superimposed on and partially connected to each other. The multiple vibrating members include a first vibrating member and a second vibrating member. The first vibrating member is held by the first holding unit and is not held by the second holding unit. The second vibrating member is held by the second holding unit and is not held by the first holding unit. At least one of the first vibrating member and the second vibrating member is a driving device to drive another member as a drive source.

Drive system and image forming apparatus including same

A step up/down switching regulator converts an input voltage of an input terminal into a predetermined setting voltage in a step up/down manner and outputs the setting voltage as an output voltage from an output terminal. The step up/down switching regulator includes a bypass mode in which the input voltage is directly bypassed to the output terminal without performing a step up/down switching, and a step up/down switching mode in which the step up/down switching is performed. The step up/down switching regulator includes a step up/down output unit, a step up/down control unit, and a mode select terminal.

Step up/down switching regulator

A gear transmission device includes a drive rotator and a driven external gear. The drive rotator includes a drive internal gear to rotate about a rotary shaft. The driven external gear meshes with the drive internal gear to transmit a drive force to a drive target.

Gear transmission device, process unit including the gear transmission device and image forming apparatus including same

A gear transmission device includes a first external gear driven by a drive motor attached to a first side of a frame and a first internal gear driven by the first external gear. The first internal gear includes an outer cylinder portion, an end plate, an annular opening, and an inner cylinder portion including a shaft hole. The outer cylinder portion includes internal teeth formed on an inner circumferential surface thereof. The inner cylinder portion is formed concentrically inside the outer cylinder portion. The end plate connects the outer cylinder portion, the inner cylinder portion, and the shaft hole at one end in an axial direction. In a state in which the annular opening faces a second side of the frame opposite the first side thereof, the first external gear is inserted to the annular opening to mesh with the internal teeth of the outer cylinder portion.

Gear transmission device and image forming apparatus including the same

Gear transmission device, process unit including the gear transmission device, and image forming apparatus including same

A drive unit includes a drive pulley connected to a drive source, a driven pulley connected to a target to be moved, at least one relay pulley for transmitting power from the drive pulley to the driven pulley, a plurality of belts including a first belt entrained around the drive pulley and the relay pulley, and a second belt entrained around the relay pulley and the driven pulley, a first tension application device, and a second tension application device. The first tension application device contacts the first belt to provide tension thereto. The second tension application device contacts the second belt to provide tension thereto. A cyclic speed variation component of the first belt in one rotation period transmitted to the driven pulley via the relay pulley and a speed variation component of the second belt in one rotation period transmitted to the driven pulley counteract each other.

Drive unit and image forming apparatus including same

Growing community of inventors

Yokosuka, Japan

Shinya Shimizu