Hitachi, Ltd.

Hiromasa Fujii

Masaya Itoh

Shigemitsu Higuchi

Hiroshi Shojima

Masanori Miyoshi

Masato Kazui

Hideo Nishijima

Atsuo Suga

Eiji Moro

Toshiro Aizawa

Shun'ichi Kaneko

Hidenori Takauji

A video monitoring system, comprises a camera, and a monitor apparatus, to which video data from the camera is transmitted, wherein the camera comprises a video obtaining unit for obtaining a signal from an image pickup device, a camera image recognizer unit for executing video processing upon an input video obtained from the video obtaining unit, an encoding unit for executing an encoding process upon basis of a result of the processing within the camera image recognizer unit, thereby producing the video data, and wherein the monitor apparatus comprises a decoding unit for decoding the video data, and an image recognizer unit for selecting a decoding means of the decoding unit, upon basis of the result of processing of the camera image recognizer unit.

Video monitoring system

This is a video image monitoring system which can effectively detect a mobile object appearing in a captured video image even if a background image and other camera condition change continuously. The video image monitoring system comprises: a video-image-capturing sectionfor putting out image data based on a video image signal obtained by using a camera; a mobile-object-candidate-area-detecting sectionfor extracting a candidate area of a mobile object from the image data; and a mobile-object-detecting sectionfor determining whether the candidate area is the mobile object. The mobile-object-candidate-area-detecting sectionquantizes a brightness gradient direction of the image data, and calculates a spatio-temporal histogram which represents the frequency of a direction code appearing in a predetermined spatio-temporal space. After that, the mobile-object-candidate-area-detecting sectioncalculates a statistical spatio-temporal space evaluation value of the spatio-temporal histogram. The mobile-object-detecting sectionuses the spatio-temporal space richness to determine whether the candidate area is the mobile object.

Video image monitoring system

A background generating method of low process cost for use in detecting a moving object based on subtraction process performed between an input image and a base image, and an apparatus with the function of detecting a moving object using its background. The apparatus consists of a feature vector extractor for calculating feature vectors from the input image and an average processor capable of obtaining an average from the calculated feature vectors, diminishing noise occurring for a short time and the influence by the moving object, and forming images that follows the illumination change due to changes in the imaging environment. The images generated by the average processor are accumulated for a predetermined number of frames and the accumulated images are statistically processed by a statistical processor.

Method for background generation and its system for video surveillance

An image monitoring system including: an image data acquisition unit for taking in video signals from a camera to acquire image data; and an image recognition unit for carrying out image recognition processing using an inputted image obtained from the image data acquisition unit, wherein the image recognition unit includes: a reference image registration means for registering a reference image selected from among the inputted images; a motion detection means for acquiring motion detection information from the inputted image; an image blur detection means for detecting image blur by comparison of the reference image with the inputted image for edge strength; a similarity computation means for computing a similarity between the reference image and the inputted image; and a camera anomaly detection unit for determining any anomaly in the camera from the motion detection information, the image blur and the similarity, wherein the comparison for edge strength and the computation for the similarity are carried out respectively for an image region excluding a region of a moving object extracted by the motion detection means.

Image monitoring system

A video surveillance equipment for detecting a change of an object in a monitoring area based on input images captured by an image capturing device, the equipment comprising:

Video surveillance equipment and video surveillance system

In an image monitoring system, an image data acquisition unit takes in video signals from a camera to acquire image data. An image recognition unit carries out image recognition processing using an inputted image obtained from the image data acquisition unit. A reference image registration unit registers a reference image selected from among the inputted images. An image blur detection unit detects a difference in image blur between the reference image and the inputted image. A similarity computation unit computes a similarity between the reference image and the inputted image. A camera anomaly detection unit detects any anomaly in the camera from the difference in image blur and the similarity.

A recording and playback apparatus for recording and playing back onto and from a magnetic tape and utilizable with a memory card adapted to be mounted onto the apparatus. The memory card is adapted to at least one of store operational characteristics for the apparatus to enable automatic setting of the operational characteristics of the apparatus when mounted and, if the apparatus includes a self-diagnostic information unit, the memory card enables storage of at least self-diagnostic information generated upon occurrence of a trouble during operation of the apparatus. The stored self-diagnostic information enables analyzing of the cause of a cause of the trouble occurring during operation of the apparatus at a time subsequent to the occurrence and taking of countermeasures with respect thereto. If the memory card is not mounted or is in a nonwritable state, the apparatus is provided with a storage device for storing the self-diagnostic information. The memory card also enables storage of other information relating to the apparatus.

Recording and playbackk apparatus

The precedingly reproduction signal reproduced by a precedingly reproducing head is recorded on a tape. If it is detected that the reproduction signal includes abnormality owing to a reason such as poor error rate, the recording operation is stopped. Then, for retrial of the recording, the information on the position where the abnormality has occurred is held. A memory may be provided to always rewrite and store the signal reproduced by the precedingly reproducing head, and also a simultaneously reproducing head which is different from the precedingly reproducing head may be provided to immediately monitor the recording state of the signal recorded on the tape. If it is detected that the signal reproduced by the simultaneously reproducing head includes abnormality, the recording operation is stopped, the information on the position where the abnormality has occurred is held. Further, the rewrite operation in the memory is stopped and the original precedingly reproduction signal corresponding to the signal to be recorded at the position where the abnormality has occurred is held in the memory.

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Yokohama, Japan

Hiromasa Fujii