JPS581278A - Separating and collating system for overlapped impression - Google Patents

Abstract

PURPOSE:To efficiently collate seal impression, by irradiating light to a seal impression section printed overlappingly in advance at a character recognizing device, picking up a pattern data of the seal impression via a filter and comparing the data with a reference pattern data prepared in advance. CONSTITUTION:A light from a light source lamp 3 is irradiated to a seal impression 7 on a document 1, and a reflected light is collected to a two dimension image sensor 9 with a lens system 4 via a filter 8a. In this case, the wave length passing through the filter 8a is taken as a specified value or less, a black impression on the document 1 and a pink seal impression 7 are both read at the sensor 9, the read optical image is converted into an electric image and inputted to a recognizing section 10. The filter 8a is switched to a filter 8b, a light with a prescribed wave length or more is passed through, black print only is read and the electric image is applied to the section 10. The pattern data of the seal 7 read with the section 10 is compared with a reference data 10a prepared in advance, allowing to easily and surely collate the seal impression 7.

Description

[Detailed description of the invention] The present invention relates to a character recognition device (hereinafter referred to as OCR).
Concerning the verification of the stamp fIIi superimposed on the

In OCR, light is irradiated onto a reading object on which an information pattern to be read is drawn, the information pattern is projected onto an image sensor through an optical lens, electricity corresponding to the information pattern is obtained, and the signal is processed to obtain information tg. The iron is z5.

Figure 1 shows the main parts of the OCR head explained above.
1x2 is a block diagram of the OCR shown in FIG.

In the figure, l indicates a document, 2rX characters, 3 a light source lamp, 4 a lens system, 5 an image sensor, 6 a frame, and 6a basic data.

Figure 1 and jlIZ&! ! As indicated by lK, the light source lamp 3 irradiates the document lJ: on which the character 2 is originally written.

The irradiated ft ni black character 2 part does not reflect, and the character 2
FXIX is emitted from the white part other than that, and the reflected light is sent to the A lens system 4! The light is focused on the image sensor 5. In other words, calligraphy! 1
The characters 20g arranged in llK are projected onto the light receiving surface of the image center t5, and the original ill image sensor 5 generates electricity gI.
K conversion. This electric image is input to the rzg minute part 6,
If it matches with the basic melody a filed as uppercase image data, it is K, and if it is NO, it means that it is different from the ascending character.

The OCR described above is extremely effective when the target is black characters written on a document.

However, it is difficult to automatically perform this process using a t-device for verifying ink stamps on documents, which is becoming increasingly necessary in financial institutions and the like. In other words, black does not reflect any wavelength of light, but vermilion reflects light when the original wavelength is approximately 600 nm (nanometers) or more. Because of this, you can read both the black letters of the seal and the seal, and cannot read the letters of the actual seal alone. The same applies if a seal is stamped on top of it.

Currently, it is inconvenient for financial institutions and other institutions to verify stamp bags only at stores that have registered the stamp #it.Furthermore, it relies on the subjective judgment of store staff through visual inspection, which is time-consuming and reduces verification accuracy. There was a limit.

There has been a demand for the development of a seal verification device that separates and verifies the overlapping stamps of stamps 1.

SUMMARY OF THE INVENTION An object of the present invention is to meet the above-mentioned needs, and to provide a seal verification method that enables verification of overlapping seals.

At a desired position on the form, the part stamped over and over the previously stamped mark is irradiated with yt, and from the reflected light obtained, a filter is used that passes only the reflected light from the stamped part. By extracting the pattern data of only the stamps through the system and comparing them with the next basic pattern data prepared in advance, only the L9 stamps were compared with t''. In this way, the separation and verification of overlapping stamps becomes oTWV.

An embodiment of the present invention will be explained below with reference to FIGS. 3 and 4. FIG. 3(&) and (b) are O according to the present invention.
In Figure 0, a perspective view showing the CR verification process, Figure 4 is a configuration diagram of Figure 3 (1), and Figure 5 is a diagram showing an example of separate stamping.
7 is a seal stamp, 8 m + 8 b is a filter, 9 is a two-dimensional image sensor, 10 #'X recognition R section, and 10 a is basic data. In addition, the same parts as in FIGS. 1 and 2 are indicated by the same symbols as Makuoka. The filter 81 in FIG. 3 (1) has a light wavelength of about 60.
It is a filter that has the ability to pass wavelengths of 0 nm or less, but does not pass wavelengths exceeding 600 nm. Filter 8bfl in Figure 3 (b) passes through a wavelength tube with a wavelength of about 600 nmkc,
This is a filter that does not pass anything below 600 nmv.

First, the first step is shown in Figure 3(a)! 5KIFi!
1li1 seal 7Kl! The light emitted from the light source lamp 3 is reflected and passes through a filter 8ht, and is focused by a lens system 4 onto a two-dimensional image sensor 9. At this time, since the wavelength of the light passing through the filter 8a is approximately 600 nm or less, the two-dimensional image sensor 9 reads both the black print on the document 1 and the vermilion stamp 7. Read light gI
It is converted into an electric name and input to the recognition unit 10.

Next, as shown in FIG. 3(b)K for @2 production, when the filter 8bK is switched and irradiation is performed again with f, the Fuchi lamp 3, when the reflected light passes through the filter 8b, it is approximately 600 nmt-
Since only the wavelengths above this are allowed to pass through, the two-dimensional image sensor 9 reads only the black print. The read data is input to the recognition section 10 in the same manner as described above.

In this case, when the input data for the filter 8b in the second step is subtracted from the input data for the filter 8b in the first step, only the vermilion data remains and becomes the seal data. This data and the registration mark are imaged, and based on the value t,
First, an area judgment is performed, and an image judgment is performed for OK items. Judgment is made using a predetermined reference value by calculating the area ratio with the data of , but if the area becomes less than 40 inches, for example, it is possible to stop the disassembly meeting when the processing data is insufficient.

In the above verification process, when two filter tubes are used, the filter can be replaced manually using a turret type or automatically using a power source such as a magnet, and two heads are prepared for each. method is also possible.

In the above embodiment, an example was explained in which two filters 8 m and 8 btl were used, but in the second step, the combination of the sensitivity of the image sensor 9 and the wavelength band of the light source lamp 3 KLv
By selecting the slice level tube for the red wavelength and reading vermilion as white, the same effect can be obtained even without using the filter 5bt, ie, without the filter.

In addition to other application examples, in addition to verifying vermilion stamps,
It is also possible to read and check when red letters etc. on a document are mixed together, and it is also possible to read and check when there are mixed red letters etc.
lilK can also be applied by appropriately selecting all filter bands for the color concerned.

According to the present invention, the above-described method allows stamps to be superimposed on documents, which has been difficult in the past. Separate verification is possible, so if the stamp f & verification device of this method is put into practical use, it will be possible to conduct high-precision WK of the seal stamps of financial institutions etc. electronically, and it will also be possible to automate it. There is. Moreover, all files in the online network for seal verification devices at financial institutions are centrally managed at the center, and IJL verification can be performed at any store, resulting in extremely efficient efficiency and improved service. There is.

[Brief explanation of drawings]

Figure 1 is a perspective view of the main parts of the OCR head, Figure 21jlJ
OCR configuration diagram of tzzg1 diagram, Figure 3 (a) and (b)
Jf1 is a perspective view showing the collation process of the dormitory embodiment according to the present invention, FIG. 4 is a block diagram of FIG. 3(a), and No. 581J is a diagram showing an example of separate sealing. In the figure, 4 is the lens system, 7 is the seal, and 8m. 8bi filter, 9m 2D image sensor, 10HM
II11 part, 1oaa basic data. ′! P/Figure

Claims (1)

[Claims] Light is irradiated onto the light stamped on the pre-printed mark at a desired position on the form, and the resulting reflection ft is used to pass only the light reflected from the seal light through a filter. Extracting pattern data and comparing it with pre-prepared basic pattern data. Overlapping stamp separation and verification method that verifies only KL9 stamps.