Hitachi, Ltd.

Hitachi Seiko, Ltd.

Masayasu Kato

Yoichi Takagi

Kazuo Watanabe

Shigeru Kakumoto

Fumitaka Otsu

Toshiaki Hara

Takashi Miyakita

Takeo Tamezawa

Shigeharu Jikan

Katsuji Terazono

A number of fish may be counted by emitting an ultrasonic wave or an electromagnetic wave toward a predetermined area of a body of water where fish pass (e.g., a fish farming pool, a river or the like). Reflected waves are received from the fish bodies so that the reflected waves received from a cross section of the predetermined area are periodically stored. An ultrasonic wave fish shade image is produced that shows changes of fish shades. Fish are counted by performing an image processing which discriminates the ultrasonic wave fish shade image based on a predetermined fish shade decision rule. This arrangement reduces errors occuring due to muddiness and dust in the water and allows an automatic continuous fish counting ability over a long time period.

Method and apparatus for counting underwater objects using an ultrasonic

A device for recognizing and matching fabric pattern-forms for cutting is constituted by a marking CAD, a pattern-match control computer, a pattern recognition device body, a camera, a monitor and console, a mouse, a camera positioning robot, a cutter, a camera and video signal changeover mechanism, an iris controller, a pattern-match and cutting table, and so on. In the marking CAD, information concerning cutting point sequence data and pattern-matching points is generated and transferred to the control computer. The pattern-matching control computer moves the camera above each of the pattern-matching points to fetch an image to thereby measure the pattern position. The cutting point sequence data are revised on the basis of the result of the measurement. When poor recognition or erroneous-recognition occurs in the pattern recognition based on the image, the pattern position is determined manually through the monitor and console and the mouse.

Image recognition device and pattern-match cutting device

In correspondence with the graphic data having a spatial extent, there is the address data table configured of arrays, the dimension of which are not smaller in number than the dimensions of the extent of the graphic data. Coordinate transformation is performed between the graphic data and the address data table, whereby any desired point on each figure can be brought into correspondence with one array number of the address data table. Those memory addresses of a graphic data table at which the individual graphic data items are sorted, are subsequently stored in the address data table. In case of searching for graphic data located at any desired position, the corresponding array number of the address data table is obtained on the basis of the position, whereupon the desired figure can be searched for through that memory address to the graphic data which is stored. In a case where the memory space of the address data table corresponding to any desired one of cells (each of which is a subspace of a graphic space) is full, relevant information of indirectly utilizing a memory space assigned to another of the cells is substitutionally stored in the address data table, conjointly with the memory address of the graphic data table storing the corresponding graphic data so that the address data table can be used efficiently. When the figure discriminators of the graphic data are stored in the address data, lines or points, the relevant attribute information items, or the like can be extracted selectively and efficiently by deciding the figure discriminators on the searching operation.

Graphic data searching and storage method

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Hitachi, Japan

Masayasu Kato