JPS5961265A - Method for transmitting image data - Google Patents

Abstract

PURPOSE:To shorten the time of transmission by switching reading conditions or the like in accordance with the matching purposes of a picture to change the volume of transmitting data. CONSTITUTION:A picture of a ticket or the like in which the address, name 2a and seal 2 of a drawer are entered is read out by a reading-out part as an image data and processed and outputted by/from an image data processing part 12. In the processing part 12, an image sensor controlling part 19 A/D converts the image data to a high gradation level and sends the converted signal to a multi/binary level controlling part 20. The controlling part 20 converts the data for the address, name 2a and seal 2 into binary and quadric data, and after adding multi/binary level discriminating code to the converted data through a buffer 9a, sends the data with the added code to a transmission controlling part 10. When the controlling part 10 transmits these information to the receiving side 14, multi/binary level discriminating part 21 in the receiving side 14 discriminates the discrimination code and expresses the address and name by binary white and black and the seal by quadric density to print out these data on a printer 17.

Description

Detailed Description of the Invention: fa+ Technical Field of the Invention The present invention relates to an image processing device that reads and transmits images such as letters and seals, and in particular changes the amount of data to be transmitted depending on the characteristics of the image to reduce the transmission time. Concerning an image data transmission method that can be shortened.

Background of fbl technology In recent years, facsimile machines that read documents such as drawings and transmit image data have rapidly become popular as part of office streamlining efforts. Devices such as seal search machines and seal matching machines that search and match documents are being developed and put into practical use.

The search and verification device irradiates light onto the stamp to be searched and verified, projects it onto an image sensor through an optical lens, obtains image data corresponding to the stamp, and searches and matches the image data of the Tome seal. This search and verification is performed by transmitting data between the data center and the store.

In particular, in the case of indexing and verification by transmission, the customer's name, etc. is sent together with a stamp and displayed on a cathode tube (hereinafter referred to as CRT), or printed on a printer and visually verified by 6'I.
E. A method of actually doing it is being adopted. In these devices, a medium on which an image or the like is written is read and transmitted by an image sensor without being sent in general, and it is desirable that the transmission time be quick.

(cl (jf:, Next Technology and Problems) Hereinafter, the conventional method will be explained using a seal verification machine as an example with reference to FIGS. 1 to 3. FIG. FIG. 2 is a schematic illustration of the shield of the matching device shown in FIG. 1, and FIG. The light from the light source lamp 3 of the section 7 illuminates the document l on which the stamp 2 and the address 2 and name 2a of the sender are written. The white parts other than the seal 2 and the name part reflect, and the reflected light is focused on the image sensor 5 by the lens system 4.Then, the document 1 is transported by the transport mechanism 6 in the direction indicated by the arrow A in the figure.
sent in the direction. That is, images of the stamp 2 and the name characters stamped on the document 1 are projected onto the light-receiving surface of the image sensor 5, and the image sensor 5 converts the optical image into a verification image data. This collation image data is input to the image data processing section 12, subjected to data processing, and output. In this case, the data includes address 1, name 2a, and seal 2 of the drawer.

To explain this data processing and verification method, the third
In the figure, on the transmitting side 13, 8 is an II feeding mechanism control unit;
A medium transport mechanism 81 (6) is used for ;li!I fall. 9 is an image buffer that holds collation image data read by the image sensor 5 of the reading section 7. IO is a transmission line control section. Then, the image (elephant center) of the input image data transferred from the image buffer 9 is calculated, the image (elephant) is rotated, data is compressed, etc., and after processing the input image data, a seal is registered. At times, the input image data is registered in a registration file of a data center in the Ministry of Illustration through a line, and when a seal is verified, it is transmitted to the receiving side 14 via a line. Reference numeral 11 is a main control unit that controls each part.Next, on the receiving side 14, 15 is a receiving line control unit that extracts the verification image data transmitted from the transmitting side 13 and the registered file of the data center. It has a function to receive registered image data, decompress it, and transfer it to the image buffer J6.1
This is a 6-striped image buffer that holds input image data from the reception line control section 15 and others. Number 17 is 1 non-event and is held in image buffer 16, ta!
! Ell the meeting image data and registered image data
It's a gll. Reference numeral 18 denotes a main control unit, which includes 4 parts of each part.

Since it has such a configuration and function, when making a six-coupled check, the verification stamp is read by the reading section 7, and the verification image sensor G held in the image buffer 9 is sent to the transmission control section. 10, received (word +) l1114 &, 2 sent] t, processed by the reception line control unit 15, stored in the image node/receiver 16, and sent to the printer 17 as ']1m1:
1j At the same time, the registration/inspection/image data read from the registration file is processed by the reception line control unit 15.
1:・I at printer 17° via image buffer 16
411^111, visually compared l1IQ! ! 6 go is made. This picture (evaporation 111 cat not shown, but CR
Display it on T and visually check it! ! ((It is also possible to combine the above. The sending side 13 and the receiving side 1ul14 may be within the same store 11, and it is also possible to transmit the data to another 1 to 1 address and check it. Of course, there are certain things.
When a matching machine reads and sends an image, the image data is processed in two values: black and white. However, binary data has the disadvantage of not being able to transmit images that contain minute line segments, such as seals, because black may turn white depending on the density. A device that faithfully reads fine line segments is being considered, but as the resolution increases, the amount of data increases, and the data area of the image file becomes extra G.
However, the disadvantage is that it takes a long time to transmit.

Moreover, since the customer's address and name only need to be read and matched, the verification accuracy required is different from the verification of the mark 6m, and high resolution is unnecessary.

(d) Purpose of the Invention The purpose of the present invention is to solve the above-mentioned drawbacks, and to provide an image data transmission method that can shorten the transmission time by changing the amount of transmitted data depending on the purpose of image matching. It is in.

te1 Structure of the Invention In the present invention, the image data processing section is provided with a switching means for switching the reading conditions or the processing conditions according to the purpose of image matching, and the output image data has an image tag. This is an image data transmission method characterized by adding identification data indicating reading conditions for reproduction and outputting the image data, and by doing so, the purpose can be achieved.

ff1 Embodiment of the Invention An embodiment of the invention will be described below with reference to FIGS. 4 and 5. FIG. 4 is a block diagram showing an embodiment according to the present invention, and FIG. 5 is an explanatory diagram of FIG. 4. The same parts as in FIGS. 1 to 3 are indicated by the same reference numerals. In FIG. 4, reference numeral 19 denotes an image sensor control section, which has a function of analog/digital conversion of read image data to a high gradation level. Reference numeral 20 denotes a multi-value/binary control unit, which is composed of, for example, a converter, and converts the image data sent at a multi-value level from the image sensor control unit 19 into binary data by providing a slice point for each level. It has a function to decide the density separately for the part and the part that is multi-valued like a seal, for example, 4 hani in this case. It also sends an identification symbol signal to the transmission line control section 10. 9a is image ha 7hua,
It has a function of holding the image data converted by the multilevel/binary control section 20 and sending it to the transmission line control section 10. 21 is a multi-value/binary identification circuit that identifies the density identification symbol of the received image data and stores it in the image buffer 1.
It has a function of sending the data to the address circuit 6a and storing it in the address circuit 21. Reference numeral 16a denotes an image buffer for holding the saw image data sent from the multi-value/binary discrimination circuit 21. 22 is an address circuit which specifies the address of data to be stored in the image buffer 16a,
It has a function of causing the printer 17 to print under the control of the main control section 18a.

Since it has such a structure and function, the address of the drawer 1
When checking the small LIJ hand etc. on which the name 2a and the seal 2 are written, the medium IBI of the reading section 7 of the transmitting IJ and lI 13 is used.
The collation image data read by the image data 5 while being transported by the transport mechanism section 6 is analog/digital converted to a high gradation level by the image sensor control section 19 and sent to the multi-value/binary control section 20 . Multivalue/binary control unit 20
In the process, the image data of the address 1 and the name 2a is converted into binary data, and the image data of the seal stamp 2 is converted into 4-value data. The data is then sent to the image buffer 9a, with 2 pixels per pixel.
Values are expressed in 1 bit, and quaternary values are expressed in 4 bits per pixel and held. and control section 1. It is sent to the transmission line control section 10 according to the command la. On the other hand, an additional signal with a multi-value/binary identification symbol is sent from the multi-value/binary control section 20 to the transmission line control section 10. The transmission line control unit 10 adds identification symbols to the data sent from the image buffer 9a to binary data and quaternary data, respectively, as shown in FIG. 5, and transmits the data via the line.

When the reception line control unit 15 of the reception side 14 receives the data, the multi-value/binary identification unit 21 identifies the identifier '-J4 and sends the data to the address specified by the a), y, and s circuits 22 of the image buffer 16a. It is held and printed on the printer 17. Therefore, an address 1 name is expressed in binary shading, that is, black and white, and a seal stamp can be expressed in shading in multiple levels of 4 values.

The registration image data at the time of registration is read in the same manner as above, sent to the data center via the line, and registered in the registration file, so a description thereof will be omitted.

Therefore, the registered image data is indexed from the registered file by an indexing operation using an operation panel (not shown) and printed by the printer 17. Therefore, by printing the registered image and the verification image side by side, it is possible to perform verification using the necessary shading.

Next, a different embodiment will be described with reference to the block diagram of FIG. The difference between the embodiment shown in FIG. 6 and the embodiment shown in FIG. 4 is that in the example shown in FIG. 6th
In the example shown in the figure, the images are converted to different resolutions and compared depending on the desired accuracy of the image. That is, in FIG. 6, reference numeral 23 denotes a resolution control unit, which receives the th command of main control m (l l b) and deletes data every other scanning scan of the image sensor 4I-5. Image sensor control fHIH1g calculates the average value of gradation and switches the resolution
It also has the function of sending an identification symbol for resolution switching to the transmission line control section 10. 24 is a resolution identification circuit, for example, RAM (Random^(, 6
53 Memory), and has a function of identifying the resolution of received image data by a program. Reference numeral 25 denotes a resolution adjustment circuit, which is configured with RAM data, for example, and has a function of inserting the same white or black in pixel units in the scanning direction of the image sensor 5 for reading image data and in the paper feeding direction according to a program. There is. 2
6.27 is an un1 circuit, and 28 is an OR circuit.

With such a configuration and function, the verification image data read by the image sensor 5 on the sending side 13 is
The image sensor control section 19 switches the resolution according to a command from the resolution control section 23 and sends it to the image buffer 9. In image buffer 9, the image data for address 2 and name is 2.
The average pixel value of the seal image data is maintained at the same resolution. The data is sent to the transmission line control unit IO, an identification symbol is added thereto, and the data is sent to the receiving side [4] via the line.

The image data received by the reception line control unit 15 is identified by the resolution identification circuit 24, and the image data of the seal is output as is without resolution adjustment, and the image data of address 1 name is adjusted by the resolution adjustment circuit 25. is output. The output data is printed by the printer 17.

Furthermore, the registration and indexing of registered image data are the same as described above, and will therefore be omitted.

Therefore, since the registered image is also printed by the printer 17, it can be compared with the reference image.

In this way, the amount of data can be reduced and transmitted by changing the data processing depending on the degree of necessity of the verification data.

(g) Detailed Description of the Invention According to the present invention, when collating small IJJ Ef, etc., it is possible to precisely compare and match an image whose written content is required to be known, such as address 9 names, and an image such as a seal stamp. By changing the image data processing conditions, it is possible to reduce the amount of data, which not only allows effective use of the image file of the image data, but also has the effect of shortening the transmission time.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main part of the head of a verification device to which the present invention is applied, FIG. 2 is a schematic explanatory diagram of the verification device shown in FIG. 1,
FIG. 3 is a block diagram showing a conventional method, FIG. 4 is a block diagram according to the present invention, FIG. 5 is an explanatory diagram of FIG. 4, and FIG. 6 is a block diagram showing a different embodiment. In the diagram, ■ is a document, 2 is a seal, and 2a is an address. Name, 5 is the image sensor, 6 is the medium tU transport mechanism, 7
is the reading section, )3 is Il! ! Feeding mechanism control section, 9.9a, 1
6 is an image buffer, IO is a transmission line control unit, Il,
Ila, 18.18a is a main control unit, 12 is an image processing unit, 13 is a transmitting side, 14 is a receiving side, 15 is a receiving line control unit, 17 is a printer, 19 is an image sensor control port 1; 11-/binary control section, 21 is a multi-value/binary discrimination circuit section, 22 is an address circuit, 23 is a resolution control section, 24 is a resolution discrimination circuit, 25 is a resolution adjustment circuit, 26゜27 is an 1ζ Circuit, 28 shows the OR circuit. 1 Figure 1 Figure 1 Figure 5 Figure A 6

Claims (1)

[Claims] The image written on the medium is read as image data by a reading unit, and the image data is subjected to image data processing (, H
In the image processing apparatus that processes and outputs the image data, the image data processing 91() is provided with a switching means for switching the reading conditions or the processing conditions depending on the purpose of the image data processing 91(). The image data transmission method is characterized in that the image data to be output is added with identification data indicating reading conditions for reproducing the image data.