JPH033088A - Automatic id recognizing device for x-ray film - Google Patents

Abstract

PURPOSE:To surely decide a boundary between a black part and a white part of a bar code by expressing the data of a bar code part by a histogram. CONSTITUTION:An X-ray film digitizer 1 digitizes a bar code printed on an X-ray film 4 as digital image data, outputs the data to a processor 2 and then stores the data in an image memory 3. The processor 2 extracts the data of the bar code part, forms a histogram based upon the extracted data, decides the black parts and white parts of the bar code, and finally outputs the decided result as the ID data of the X-ray film. Consequently, the automatic X-ray film ID recognizing device reduced at its reading error ratio can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic ID recognition system from XIl film, and more particularly to a recognition device for barcodes printed on X-ray film.

[Conventional technology]

Conventionally, this type of automatic ID recognition method involves pasting a pre-printed barcode label onto an was.

[Problem to be solved by the invention]

The above-described conventional automatic ID recognition system for X-ray film is time-consuming and labor-intensive because a barcode label is printed out using a separate barcode issuing device and pasted onto the X-ray film.

Also, attempts have been made to print barcodes on X-ray film, but these methods have the drawback of having a high reading error rate and being impractical.

The object of the present invention is to develop an X-ray film ID that solves the above problems.
The purpose of the present invention is to provide an automatic recognition device.

[Means to solve the problem]

In order to achieve the above object, the X-ray film ID automatic recognition device according to the present invention includes an X-ray film digitizer that converts the bar code of the X-ray film into digital image data, and an The apparatus includes a processing device that creates a histogram from barcode data and outputs ID data of the X-ray film using the histogram function.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a processing flow diagram.

The present invention recognizes and identifies barcodes printed directly on X-ray film, and as shown in FIG. It has a processing device 2 that creates a histogram from digital image data and outputs ID data of an X-ray film using the histogram function, and an image memory 3.

The X-ray film digitizer 1 digitizes the barcode printed on the X-ray film 4 as digital image data (step S in FIG. 2), and the processing device 2
Output to. Furthermore, it is stored in the image memory 3. The processing device 2 extracts the data of the barcode part (step S2 in Figure 2), creates a histogram based on it (step S3 in Figure 2), and distinguishes between black and white parts of the barcode (step S4 in Figure 2). , ultimately the ID of the X-ray film
Output as data (step S2 in FIG. 2).

FIG. 3 shows a method of creating a histogram of a barcode section and determining a boundary line, which is performed within the processing device 2.

That is, the processing device 2 processes the imaged barcode 10.
Cut out a part of the image and create a histogram.

The vertical axis 12 of the histogram is the number of pixels with a certain data value within the target area, and the horizontal axis 13 is the minimum value of data ~
The boundary between the white and black portions of the barcode, which represents the maximum value, is determined by the value 14 at the boundary between the two peaks appearing in the histogram. White and black are distinguished for the histogram creation range 11 using the black and white boundary data value 14 of the barcode as a condition, and this process is repeated over the entire fA area of the barcode.

That is, the processing device 2 has a function of recognizing the black and white of the barcode based on the slope of the histogram, reading the accurately printed barcode, and recognizing it as an ID.

〔Effect of the invention〕

As described above, the present invention has the effect that the boundary between the black and white portions of the barcode can be more reliably determined by representing the data in the barcode portion in a straight line. In particular, the barcode printed on x#s film varies greatly depending on the location, depending on the amount of X-ray irradiation and the condition of the developer, so the black and white levels of the barcode cannot be determined unambiguously. However, according to the present invention, it is possible to distinguish between black and white by following the changed level, and it has the effect of being able to be recognized as ID data.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a processing flow diagram when the device shown in Fig. 1 is used, and Fig. 3 is data based on a histogram created based on the read data. FIG. 3 is a diagram showing a black and white discrimination method. 1... X-ray film digitizer 2... Processing device 3... Image memory 4...
・X-ray film Fig. 1 Heat gate, 1 Fig. 3

Claims (1)

[Claims] (1) An X-ray film digitizer that converts the barcode of the X-ray film into digital image data; a histogram is created from the barcode data output from the X-ray film digitizer; and the histogram function is used to convert the X-ray film into digital image data. 1. An automatic ID recognition device for X-ray film, comprising a processing device that outputs ID data.