JPS61133486A - Code reading method - Google Patents

Abstract

PURPOSE:To discriminate an object moving in a high speed by reading a still picture stored in a picture memory to read a code appearing on the still picture. CONSTITUTION:Suppose that an object 11 with a code 10 is moved on a belt 12. A sensor 13 detects the object 11, a detection signal is fed to a controller 14, which lights a strobo 15. An image pickup device 16 is activated synchronously therewith to pick up the object 11 as a still picture, which is stored in a picture memory 17. A processor 19 applies a proper processing to a required part of the picture to read a code added to the object. Since the code is read from the still picture, the code is identified with the comparatively simple method. Further, a terminal device is used to output or collect the result of discrimination.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for reading a code attached to an object, and particularly to a code reading method for reading a code on an object moving at high speed.

[Conventional technology]

BACKGROUND ART In order to mechanically identify objects, methods are used in various fields to identify characters or codes by attaching characters or codes to objects and reading the codes. A typical example is barcodes, which are read by machines by placing a reading device close to the code.

Another method of identifying an object is to visualize the object using an image pickup device or the like, and to identify special images of the image.

However, the above methods have problems such as requiring the reader to be close to the object or requiring sophisticated processing for discrimination.

[Problem that the invention seeks to solve]

The present invention solves the problems of the above-mentioned methods, and eliminates the need for a reading device to be close to the object, and does not require sophisticated processing for 5-discrimination. The purpose is to provide a method for identifying objects moving at high speed.

[Means for solving problems]

The present invention achieves the above object by photographing a coded object as a still image, storing it in an image memory, reading out the still image stored in the single image memory, and reading the code appearing in the still image. It is.

[Effect]

In the code reading method according to the present invention, a flash of light is generated in response to an object detection signal, a still image is taken by an imager in synchronization with the flash, this still image is stored in an image memory, and the image memo is stored in the image memory. The present invention is characterized in that a stored still image is read out and a code printed on the still image is read out.

[Implementation row]

Hereinafter, one embodiment of the present invention will be explained with reference to one drawing.

FIG. 1 is an explanatory diagram showing an implementation sequence of the present invention.

Assume that an object 11 to which a code 10 is attached is moving on a belt 12. Senna L3 detects object 1L, a detection signal is sent to controller 14, and controller 14 detects object 1L.
5 to emit light. In synchronization with this, the imager [6] operates to photograph the object 11 as a still image, and this still image is stored in the image memo 1717K. Although not shown in the figure, a device that performs digitization processing is used to store one image in the memory.

The display 1B for monitoring images stored in the image memory 7 is not necessarily required.

A processor 19 is used to read the still image stored in the image memory 7 and determine the code. This process applies appropriate processing to the necessary parts of the image and continues the code attached to the object. Since it is read from a still image, it can be identified using a relatively simple method.

Note that the terminal device 20 is used to tally the results of the determination.

The controller [4] is used to control all of the system of the code reading method according to the present invention, and is used not only to emit light from the strobe [5] and operate the image pickup device L6, but also to control the processor L9t. It is used to change the timing of the operation of the device.

〔Effect of the invention〕

According to the present invention, objects moving at high speed can be easily distinguished. That is, there is no need to be close to a moving object, and there is no need for a sophisticated processing device for image processing.

Therefore, it becomes possible to use a code reading device that is a simple device and is capable of continuous casting operation.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an implementation sequence of the present invention. 13...Sensor, 15...Strobe. 16... Imager

Claims (1)

[Claims] In a code reading method for reading a code on a moving object attached with a code, the object is detected, a strobe is turned on, a still image is taken with an image pickup device, the still image is stored in an image memory, A code reading method comprising reading a still image stored in a still image and reading a code of an object in the still image.