Hitachi, Ltd.

Kenzo Takeichi

Mitsunobu Isobe

Akinobu Takemoto

Kichie Matsuzaki

Minoru Makita

Ryoichi Hisatomi

Kouzou Nemoto

Hideaki Suzuki

Yoshiaki Yoshikawa

Kazuo Kato

Yuhiko Yabe

Minoru Kano

Ryouichi Hisatomi

Shigeru Fujimori

Mitsuo Oono

Masasi Kudou

The present invention relates to a character recognition equipment which is capable of recognizing with high accuracy those characters that have poor contrast and produce variation in printing density such as characters printed on industrial products. The character recognition equipment according to the present invention is composed of an input unit group which processes in image in a plurality of window regions that are set on a character image, a feature unit group which performs calculation on values obtained by adding thresholds to the output values therefrom, and an output unit group which performs calculation on values obtained by multiplying output values from the feature unit group and adding the thresholds to the sum total thereof. Here, the thresholds and the weights can be adjusted automatically with an actual object image.

Character recognition equipment

An image processing apparatus which allows a plurality of access circuits to perform access operations simultaneously including a first access circuit for writing a video signal in digital form, obtained by A/D conversion, into an image memory, a plurality of process memories for storing necessary data, taken out from the video signals stored in the image memory, a plurality of second access circuits for accessing the image memory and the process memories, and performing specified data processing to obtain necessary data from the image memory, and a third access circuit having the same functions as the second access circuits and a function to control the operation of the first and second access circuits. Access switchover circuits are provided for each of the image memory and process memories, for switching over access to the memories to either the first, second or third access circuits.

Image processing apparatus and method in which a plurality of access

An object recognize apparatus suitable for recognition of a complex object constituted with a plurality of elements. When specifying a recognition object, a plurality of elements constituting the finally required recognition object are respectively designated as recognition objects, and when specifying an upper-level recognition object, lower-level recognition objects thereof are designated. Furthermore, for each lower-level recognition object, geometric features necessary for the recognition are specified. In an analysis of image data, the lower-level recognition objects are first detected by use of the geometric features so as to next attain the upper-level recognition object based on results of the detection. As a result, a complex object existing at an arbitrary position can be judged and the position thereof is obtained.

Object recognize apparatus

A servo motor control system for accurately pointing and controlling the speed of a servo motor using a low resolution PWM signal. A PWM command value given in each control operation cycle for driving other servo motors is divided, and output to a power control device operating signal generation circuit.

Method and apparatus for controlling a servo motor

There is disclosed a control method for returning a robot control operation to an accurate zero point before the start of the operation. The method is suitable when applied even to a turning operation of 360 degrees or more. For this control, the arm of the robot is turned counterclockwise at a low speed until a zero position detecting switch is turned on, and these turns are then reversed and stopped when a zero position detecting pulse is generated. The counted value (A) of the deviation between the instant when the zero position detecting switch in this case is turned on and the instant when the zero position detecting pulse is generated is registered. The counted value (B) measured likewise each time during the subsequent zero point adjustments is compared with the aforementioned counted value (A) of the deviation first registered so that the zero point of the control operation of the robot can be detected.

Zero point adjusting robot control method

In a control apparatus controlling point-to-point movement of arms of a robot, stepping motors are used to drive the shafts of the robot arms respectively, and motor drivers drive the stepping motors according to a 1-2-phase excitation mode in a low speed range but according to a 2-phase excitation mode in an intermediate and a high speed range.

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Tochigi, Japan

Kenzo Takeichi