Nec Corporation

Mitsubishi Shipbuilding Co., Ltd.

Taichi Tanaka

Hiroshi Tanaka

Osamu Hoshuyama

Daisuke Ikefuji

Masayuki Ariyoshi

Shingo Yamanouchi

Tatsuya Sumiya

Yuzo Senda

Toshiyuki Nomura

Kazumine Ogura

Osamu Hosyuyama

Kazurnine Ogura

The image analyzing device calculates a phase difference image of a pair of images, calculates a phase difference between close pixels in the phase difference image, generates an evaluation function including a shooting time difference of the pair of images and taking a variable that is a displacement velocity difference of close pixels or an evaluation function including a baseline distance and taking a variable that is an elevation of close pixels, and optimizing the evaluation function for each pair of close pixels. The image analyzing device sets a threshold based on a result of evaluation of the random number using the evaluation function, and obtains merged data of an entire image by merging values of variables when performing optimization except for variables for which evaluation value using the evaluation function is below the threshold.

Image analyzing device and image analyzing method

An object detection apparatusincludes: a transmission unit, having a transmission antenna, configured to emit a radio wave toward an object using the transmission antenna; a reception unit, having a reception antenna, configured to receive the radio wave reflected by the object as a reception signal and generate an intermediate frequency signal from the reception signal received; and a processing device. The processing devicecalculates an amplitude distribution of the radio wave reflected by the object on the basis of the placement of the transmission antenna, the placement of the reception antenna, the frequency of the radio wave emitted from the transmission antenna, and the intermediate frequency signal, and furthermore, using a correction operator calculated from a point spread function indicating characteristics of the transmission unitand the reception unit, corrects the amplitude distribution calculated.

Object detection apparatus, object detection method, and computer-readable recording medium

The radar deviceincludes radar signal transmission and receiving meansfor obtaining radar signals, based on reflected waves received by a plurality of receiving antennas, movement estimation meansfor estimating a movement of an object that may appear in a radar image, movement discretization meansfor discretizing the estimated movement, signal dividing meansfor dividing the radar signals into a plurality of groups, Fourier transform processing meansfor applying Fourier transform to the radar signals of each of the groups, phase-compensation and synthesis processing meansfor synthesizing results of the Fourier transform after performing phase compensation corresponding to the movement of the object on the results of the Fourier transform, and imaging processing meansfor generating the radar image from the synthesized result of the Fourier transform.

Radar device, imaging method, and imaging program

A radar signal imaging deviceincludes: a transmission unitwhich transmits a radar signal toward an object to be imaged that is a non-rigid body; a position estimation unitwhich estimates the position of the object; an oscillation degree estimation unitwhich estimates an oscillation degree which is a degree of change within a predetermined period in the relative positions of feature points constituting the object; and a synthetic aperture processing unitwhich performs synthetic aperture processing on the radar signal reflected by the object on the basis of the estimated position of the object and the estimated oscillation degree.

Radar signal imaging device, radar signal imaging method, and radar signal imaging program

The image processing deviceA includes phase specifying meansfor specifying a phase of a sample pixel from a plurality of SAR images, clustering meansfor generating a plurality of clusters by clustering the sample pixels based on correlation of phases of a pair of the sample pixels in the SAR image, and phase statistic data calculation meansfor calculating phase statistic data capable of grasping a phase statistic regarding the pixel for each of the clusters.

Image processing device and image processing method

A synthetic aperture radar image analysis systemincludes: a phase correlation determination meanswhich determines a strength of the phase correlation between a plurality of pixels in an image selected from among a plurality of images on the basis of the plurality of images that have been photographed by a synthetic aperture radar and show the same point; a shape determination meanswhich determines a degree of similarity between the shape of the distribution of the plurality of pixels and an object shape indicated by geospatial information; and an association meanswhich associates the plurality of pixels with the object on the basis of the determined strength of the phase correlation and the determined degree of similarity.

Synthetic aperture radar image analysis system, synthetic aperture radar image analysis method, and synthetic aperture radar image analysis program

The signal processing device includes an interference processing unit which generates an interferogram from a plurality of SAR images, a coherence calculation unit which calculates coherence of the SAR images, a singular point processing unit which performs an operation for resolving singular points in the interferogram, a phase unwrapping unit which executes a phase unwrapping process using operation result of the singular point processing unit, and an SBAS analysis unit which performs displacement analysis by SBAS, using processing result of the phase unwrapping unit.

Synthetic aperture radar signal processing device and signal processing method

A synthetic aperture radar signal analysis deviceincludes: an extraction unitthat extracts a stable reflection point from time-series data acquired through observation, by a synthetic aperture radar, of a region to be observed from a predetermined observing direction; a generation unitthat generates a cluster which is a collection of stable reflection points on the basis of the extracted stable reflection point corresponding to the predetermined observing direction; an association unitthat associates the generated cluster corresponding to the predetermined observing direction with a structure indicated by map data corresponding to the region to be observed; and a synthesis unitthat performs vector-synthesis of displacement rates for a plurality of the clusters each corresponding to the observing direction associated with the structure.

Synthetic aperture radar signal analysis device, synthetic aperture radar signal analysis method, and synthetic aperture radar signal analysis program

The synthetic aperture radar image processing device includes time-series analysis unit which extracts persistent scatterers from time-series observation data for the observation direction for an observation area observed from multiple observation directions by a radar, and calculating displacement speeds of the extracted persistent scatterers, clustering unit which generates reflection point clusters by clustering extracted persistent scatterers based on their phase and position, distance calculation unit which calculates a distance between each of the persistent scatterers included in the reflection point clusters and each structure included in the observation area, representative value calculation unit which calculates each representative value for the distance between each persistent scatterer and each structure, for each reflection point cluster, and corresponding structure determination unit which associates the structure corresponding to the smallest representative value with the persistent scatterer, for each reflection point cluster.

Synthetic-aperture-radar image processing device and image processing method

This invention is directed to an image processing apparatus that generates an evaluation index of a persistent scatterer likelihood without any influence of a large phase change with respect to a target whose displacement is nonlinear, a target whose elevation is high, or a target whose displacement is large. The image processing apparatus includes a phase array accumulator that accumulates phase arrays of respective pixels over a plurality of images, a clustering unit that classifies the respective pixels into a plurality of clusters based on the phase arrays, and a phase correlation calculator that calculates a correlation between a phase change in each of the plurality of clusters and the phase array at the respective pixels.

SAR image analysis system, image processing apparatus, image processing method, and image processing program

An image analysis device that ease association between an SAR image and an object is provided. The image analysis device includes: a stable reflection point identification unit that identifies, based on a plurality of synthetic aperture radar (SAR) images, stable reflection points at which reflection is stable in the plurality of SAR images; a phase identification unit that identifies a phase at each of the stable reflection points, based on the plurality of SAR images and a location of the stable reflection point in the plurality of SAR images; and a clustering means that clusters the stable reflection points, based on a Euclidian distance between each of the stable reflection points and a correlation of the phases at each of the stable reflection points.

Image analysis device, image analysis method, and computer-readable recording medium

A synthetic aperture radar signal processing deviceincludes a persistent scatterer extraction unitwhich extracts, from time-series observation data related to an observation target observed from a plurality of observation directions by a radar, a plurality of persistent scatterers in respective observation directions; a persistent scatterer grouping unitwhich groups the plurality of persistent scatterers in each of the observation directions; a group selection unitwhich selects, in each of the observation directions, a persistent scatterer group that includes the persistent scatterers included in an analysis target from among groups generated by grouping; and a displacement speed processing unitwhich synthesize displacement speeds of the selected persistent scatterer groups.

Synthetic aperture radar signal processing device and method

Persistent scatterers on images and a target object are readily associated with each other. There is provided an image processing apparatus including a persistent scatterer specifier, a phase acquirer, and a clustering unit. The persistent scatterer specifier of the image processing apparatus specifies persistent scatterers at which reflection is stable in a plurality of images. The phase acquirer of the image processing apparatus acquires phases of the specified persistent scatterers. The clustering unit of the image processing apparatus clusters the persistent scatterers based on the positions of the persistent scatterers and the phases.

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Tokyo, Japan

Taichi Tanaka