Hitachi, Ltd.

Hitachi Medical Corporation

Hitachi-high-technologies Corporation

Hitachi Instrument Engineering Co., Ltd.

Jun'ichi Taguchi

Koichi Sano

Kunihiko Kido

Yuichi Abe

Mitsuji Ikeda

Masahiro Kitazawa

Shigeyuki Nishitani

Hiroshi Yoshiura

Toshio Tanaka

Hiroyuki Mano

Tetsuo Yokoyama

Naoki Satoh

Kunihiko Miyazaki

Wataru Nagatomo

Isao Echizen

Ryuzaburo Takeda

Kousuke Anzai

Katsuyuki Okeya

Tuyosi Shudo

Kazunori Nakano

Makoto Yoshida

Hidehiko Asoh

An evaluation value indicative of the extent of lines in each direction is calculated for a pre-processed image in which 0s are filled in and extended in the lateral direction of the inputted image and which has been reduced &#x215b;th in the longitudinal direction. To obtain the angle of rotation of an image from the change in the evaluation value obtained while the angle relative to the lateral direction of the pre-processed image is modified in small steps, a parallel line is drawn for each direction, a projection is taken, and the sum of squares serves as the evaluation value of the direction. The direction having the highest evaluation value serves as the obtained direction of rotation from the normal position. The projection of each direction references the point of intersection between the parallel line drawn for each direction and the coordinate line of the horizontal axis.

Device and method for detecting angle of rotation from normal position of image

The present invention is a template matching processing device capable of evaluating a similarity degree which supports even a case of intensive morphological change between a design image and a photographic image. In the template matching processing device, matching processing between the design image and the photographic image is performed, a partial design image is obtained by clipping a portion having the highest correlation (step), and processing for deforming the photographic image in accordance with the clipped design image (stepsto) is performed, so that correlation between the deformed image obtained and the design image is taken to be set as the similarity degree.

Template matching processing device and template matching processing program

A contents control method for controlling a process on the receiving side which is applied to contents transmitted from the transmitting side to the receiving side, includes a step of adding, when a predetermined block of the transmitted contents is an area where control information for controlling the process substance on the receiving side which is applied to the contents is added, the control information to the block. The method also includes a step of receiving a process designation concerning the transmitted contents, and a step of applying, when user information stored in a receiving side apparatus which receives the transmitted contents, or information concerning the receiving side apparatus satisfies conditions corresponding to the received process designation in the control information added to the block of the contents, a process corresponding to the process designation to the received block.

Method and system for contents control

In an image processing method and in an image processing apparatus, edge and flat zones of an original image are separately recognized, a first nonlinear flattening process effective for the edge zone is executed to obtain first data, and a second nonlinear flattening process effective for the flat zone is executed to obtain second data. An image is rearranged by using the first and second data for the edge and flat zones, respectively. On a computer-readable recording media, there is stored the image processing method in the form of a program code.

Image processing method, an image processing apparatus, and a recording media on which an image processing program is recorded

There are formed three kinds of virtual spectrum aperture images in which a weight is added to each spectrum channel image of multiple spectrum data, three kinds of characteristic virtual spectrum aperture images are allocated to RGB (red, green, blue) and a color synthesized image is displayed. A line spectrum image of a designated line of the displayed color synthesized image is displayed, and a spectrum of a designated point is further displayed. A user is able to select whether the spectrum that is once displayed should be left or deleted. When the displayed spectrum should be left, such displayed spectrum is superimposed upon a spectrum of the next selected point. Also, spectrums of points in the designated range are sequentially displayed in a cinema fashion.

Image processing method and apparatus for multiple spectrum image data

In order to realize multi-level gradation representation with reduced crosstalk in a display apparatus of STN method, one horizontal interval is divided uniformly by the bit length n of a gradation level display in a display apparatus of STN method having a display panel of simple matrix type and having display luminance depending upon the root-mean-square value of applied voltage. Each of sections resulting from division is associated with a display bit. The applied voltage value of the display panel in each divisional section is adjusted so that the root-mean-square voltage value difference on a divisional section may become the density difference meant by the display bit. Since time is divided into nearly equal n parts to represent a gradation level, the minimum time interval resulting from division becomes longer that of the conventional technique. Since the frequency band in use is narrowed, the crosstalk is reduced. As a result, false images and flicker on the display screen can be suppressed.

Method for driving apparatus

A noise filtering method including the steps of calculating a magnitude E.sub.i of density change for each of a plurality of linear direction components i in a local region around each of pixels of an inputted two-dimensional image, detecting such a direction as to minimize the magnitude E.sub.i of density change, conducting smoothing processing by deriving an arithmetic mean of densities of pixels in the local region arranged in the detected direction, and thereby reducing noise of the inputted image.

Method conducting smoothing processing in a linear direction having a

Physical quantities representing six kinds of freedom relating to parallel movement and rotation of an inspection object are detected during repetition of a measurement sequence of magnetic resonance imaging, and a direction and a position of a desired slice moved with parallel movement and rotation of the inspection object are calculated in accordance with the detection result. An intensity ratio of gradient magnetic fields in x-, y- and z-axes directions for synthesizing a slice direction gradient magnetic field, an intensity of a phase encoder gradient magnetic field and a read direction gradient magnetic field are determined so that a direction of an excitation slice coincides with the direction of the desired slice after movement. Similarly, a center frequency of excitation pulses is determined so that a position of the excitation slice coincides with the position of the desired slice after movement. Magnetic resonance signals are measured by imaging parameters so updated, and an image is reconstructed.

Method of motion tracking measurement in MR imaging system

When image information obtained on the basis of an NMR signal, e.g. MRI, is acquired, a radio frequency pulse is set so that a strong signal can be obtained particularly from a portion of interest among the sample. To accomplish this object, the occurrence of signals from portions of the sample other than the selected portion of interest is inhibited in advance of obtaining information (an image) of the sample. Various radio frequency pulses are then irradiated to the sample and a suitable radio frequency pulse is determined on the basis of the resulting signal.

Method and apparatus for regulating radio frequency pulse

To accomplish double-slice imaging by a nuclear magnetic resonance (NMR) imaging apparatus having an ordinary radio frequency magnetic field generator, two radio frequency magnetic field waveforms are used and slices are separated by subsequent calculation. More definitely, two slice portions are excited in a REAL direction by a COS waveform and are excited in an IMAG direction by a SIN waveform. When one of the slices is S1 with the other being S2, the signal SC when the COS waveform is used is S1+S2 while the signal SS when the SIN waveform is used is i.S1-i.S2. Therefore, the calculation for separating the slices proves SC+i.SS and SC-i.SS. The present invention can avoid the increase in the production cost of the apparatus due to the addition of hardwares.

Double-slice imaging method in NMR imaging apparatus

A magnetic resonance imaging apparatus selects a partial region of a slice in a subject with a radio frequency magnetic field and generates echo signals only from the partial region. The echo signals are collected from the subject by using an ultra-high speed data acquisition technique. An image of a partial region is reconstructed from the echo signals.

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Sagamihara, Japan

Jun'ichi Taguchi