JP2014023031A - Optical reading method for leaflet printing medium, and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical reading method with which read accuracy is improved by correctly reading image data without being affected by conveyance displacement of leaves caused by friction between the leaves and a scanner.SOLUTION: An optical reading method includes: a first step of reading a passbook in a spread state in one direction by means of a contact scanner and storing image data read from a lower page of the passbook; a second step of reading the same passbook in a reverse direction and storing the image data read from an upper page of the passbook; a third step of forming complete image data by coupling the image data read from the lower page and the image data read from the upper page in such a manner that the upper page and the lower page are continued; and a fourth step of performing image analysis processing on the complete image data.

Description

  The present invention relates to an optical reading method of a booklet-shaped print medium (hereinafter referred to as “passbook”) having a stitch such as a bankbook, a transfer book, and the like, and an optical reading device for using the method.

  As illustrated in FIG. 3, generally, the passbook N is formed by binding a plurality of paper sheets 31 at the center in the longitudinal direction. In the spread state of the passbook N, the page on the front side when the printed characters are in the normal direction is hereinafter referred to as “upper page”, and the page on the front side is hereinafter referred to as “lower page”. When the passbook N is read by the optical reader, it is inserted in the reader with the upper page UP facing forward and the lower page LP facing forward in a spread state.

  A conventional optical reading device that reads the bankbook N includes a conveyance unit that conveys a bankbook inserted in a spread state along a predetermined conveyance path, a detection unit that detects a position of the bankbook being conveyed, and a bankbook that is conveyed. Reading means optically at a predetermined position, printing means for printing at a predetermined position of the passbook, control means for processing information and controlling each means by exchanging signals with each means It has.

  FIG. 4 shows an example of a specific configuration of a conventional optical reader OA. A motor 41, a conveyance roller 42 that is rotationally driven by the motor 41, and a conveyance guide (not shown) constitute conveyance means, and a passbook detection sensor 43 that detects the position of the passbook N conveyed by the conveyance means. A scanner 44 which constitutes a detecting means, reads the printed contents of the bankbook N being conveyed, and gives the read data to the control unit 46 constitutes a reading means, and a print head 45 which prints at a predetermined position of the bankbook N is a printing means. A control unit 46 that performs predetermined control by giving signals to the motor 41 and the print head 45, and stores and processes image data acquired from the scanner 44 constitutes a control means.

  In FIG. 4, for the sake of simplification of the drawing, the transport roller 42 is shown only at two front and rear positions, but is provided at other necessary positions. The scanner 44 is a close contact type that is in close contact with the passbook by an urging means such as a spring (not shown) in order to stably read even the binding F of the passbook N (see FIG. 3). Although only one passbook detection sensor 43 is shown in FIG. 4, a plurality of passbook detection sensors 43 are provided in order to detect the presence / absence of a passbook and passage. The controller 46 transports the bankbook at a constant speed by the transport means, positions the bankbook N at a predetermined position based on the detection signal from the bankbook detection sensor 43, acquires image data from the scanner 44, and is not shown. The transaction processing is performed using data given from the host device, and the result is printed at a predetermined position of the bankbook N by the print head 45.

  In the conventional optical reader, the passbook N is read from only one direction. The details of the behavior of the bankbook at that time are illustrated as shown in FIGS. 5A to 5H over time. In FIG. 5, the carrying direction of the bankbook N is the left direction.

  Even if the passbook N in the spread state is sandwiched between the upper and lower transport rollers 42, the middle sheet on the top page UP is displaced rearward due to friction between the middle sheet and the scanner 44 while being conveyed. 5 (a), 5 (e) to 5 (h) is a normal shift amount due to the depression of the stitch F, while in FIGS. 5 (b) to 5 (d), the intermediate paper and the scanner 44 are used. The amount of conveyance deviation caused by the influence of the friction increases gradually as d1, d2, and d3, and the amount of conveyance deviation d3 becomes noticeable when the stitch F of the passbook approaches toward the scanner 44.

  Due to this large amount of conveyance deviation, there is a problem that the image data acquired from the scanner 44 is apparently extended, which hinders the image processing by the control unit 46. This phenomenon is remarkable when the binding F of the passbook N moves toward the scanner 44, and does not cause a problem when the binding F moves away from the scanner 44.

  Therefore, when the passbook N is transported in the forward direction, for example, in the left direction in FIG. 5, due to the occurrence of the above-described transport misalignment, the scanner 44 contacts from one end to the other end of the passbook N, so that the lower page LP can be read normally. However, the upper page UP cannot be read normally. Further, when the bankbook N is conveyed in the reverse direction, for example, in the right direction in FIG. 5, the scanner 44 can normally read the upper page UP but cannot read the lower page LP normally. Thus, in the conventional bankbook reading method, the image data could not be read correctly by one scanning, and there was a problem in the reliability of reading accuracy.

JP 2004-252903 A Japanese Patent No. 443893

  The present invention has been made in view of the above points, and a first object is to correctly read image data without being affected by the conveyance deviation of the intermediate paper due to friction between the intermediate paper and the scanner, An object of the present invention is to provide an optical reading method in which reading accuracy is improved. A second object is to provide an optical reader for using the reading method.

  In order to achieve the first object, the passbook optical reading method according to the present invention reads a passbook in a spread state in one direction with a contact scanner, and reads image data (lower page data) read from the lower page of the passbook. The first step to save, the second step to read the same passbook in the reverse direction and save the image data (upper page data) read from the upper page of the passbook, and the upper page data and lower page data are combined in this order Then, the method has a third step of forming all image data of a spread page and a fourth step of performing image analysis processing on the entire image data.

  In order to achieve the second object, the present invention provides a passbook optical reader that reads a passbook in a spread state with a contact scanner and performs image analysis of the read image data. A first buffer memory for storing image data of the lower page when the image is read in one direction, a second buffer memory for storing image data of the upper page when the same passbook is read in the reverse direction by the contact scanner, and a postscript A storage unit having a third buffer memory for storing complete image data, a lower page image data stored in the first buffer memory, and an upper page image data stored in the second buffer memory. A third buffer memory for forming the complete image data by combining the end of the image data so that the start of the image data of the lower page continues. Stored, and is characterized in that an arithmetic control unit for performing image analysis processing for the third full image data stored in the buffer memory.

  Further, the present invention provides the passbook optical reader, wherein the calculation control unit measures the passbook length measuring means for measuring the passbook length based on the signal from the passbook detection sensor provided in the passbook conveyance path, and the measurement. The half of the length of the passbook is the length of the lower page, the image data for the lower page is cut out from the image data stored in the first buffer memory, stored in the third buffer memory, and the measured passbook length And the data dividing means for cutting out the image data of the upper page from the image data stored in the second buffer memory and storing it in the third buffer memory, and storing the data in the third buffer memory. A data synthesizing means for connecting the end of the image data for the upper page so that the start of the image data for the lower page is continuous and storing it as complete image data; Characterized in that it comprises an image analysis unit for performing image analysis processing on the stored full image data.

  According to the present invention, the image data of the lower page that is not affected by the friction between the middle paper and the scanner when reading the bankbook in one direction, and the influence of the friction between the middle paper and the scanner when reading the reverse direction of the bankbook. Since the image analysis processing is performed on the complete image data formed by combining the image data of the upper page and the image data of the lower page from the image data of the upper page not receiving the image data, the image data is correctly read from the passbook, An optical reading method capable of obtaining a highly reliable image analysis processing result can be provided.

  Further, according to the present invention, it is possible to provide an optical reader capable of performing the optical reading method.

It is a block diagram which shows the basic composition of embodiment of this invention. It is a figure explaining the principle of this invention method. It is a perspective view of a general bankbook in a spread state. It is a conceptual diagram which shows the structure of a general optical reader. It is a figure explaining the problem at the time of bankbook conveyance in an optical reader.

  Next, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the optical reading device NA using the method of the present invention has a conveying means (motor, conveying roller, etc.) 11 for conveying a passbook inserted in a spread state along a predetermined conveying path, and conveying Detection means (passbook detection sensor) 12 for detecting the position of the passbook to be read, reading means (contact type scanner) 13 for optically reading the passbook to be conveyed at a predetermined position, and printing means for printing at a predetermined position of the passbook (Print head) 14 and the control means for sending and receiving signals between each means to store and process information and control each means is the conventional optical reading shown in FIG. Although it is the same as the apparatus OA, in the present invention, an arithmetic control unit 15 and a storage unit 16 as shown in FIG. 1 are provided instead of the control unit 46 of the conventional optical reader OA.

  The passbook detection sensors 12 are provided at a plurality of locations along the passbook transport path. The contact scanner 13 is called a line sensor in which a large number of CCDs are arranged on a straight line, and is pressed by a spring or the like so as to be in close contact with the passbook transported through the passbook transport path.

  The arithmetic control unit 15 includes a passbook length measuring unit 151, a read data storage control unit 152, a data dividing unit 153, a data synthesis unit 154, and an image analysis unit 155, as well as a passbook in the optical reader. A conveyance control unit 156 normally provided for conveyance and a print control unit 157 for controlling printing on the passbook N by the print head 14 are provided.

  The storage unit 16 includes a ROM 160 that stores a program for performing control of each unit, data processing, and the like, and a RAM for storing working data. A first buffer memory 161, a second buffer memory 162, and a third buffer memory 163 are configured by a part of the RAM.

  The passbook length measuring means 151 measures the length of the passbook to be transported based on the signal from the passbook detection sensor 12 provided in the passbook transport path and the number of pulses applied to the motor of the transport means. .

  The read data storage control means 152 stores the image data when the passbook is read in one direction by the scanner 13 in the first buffer memory 161, and the data dividing means 153 out of the stored image data for the lower page. The image data cut out as image data is stored in the first buffer memory 161, and the image data when the passbook is read in the reverse direction by the scanner 13 is stored in the second buffer memory 162. Is stored in the second buffer memory 162 by the data dividing unit 153, and the image data for the lower page and the image data for the upper page are combined by the data combining unit 154. Is completely formed The Jideta those that stored in the third buffer memory 163.

  The data dividing unit 153 sets half of the passbook length measured by the passbook length measuring unit 151 as the length of the lower page LP, and the image data for the lower page from the image data stored in the first buffer memory 161. Cutting out and cutting the image data for the upper page from the image data stored in the second buffer memory 162 with the half of the passbook length measured by the passbook length measuring means 151 as the length of the upper page UP It is.

  The data synthesizing unit 154 synthesizes the image data for the lower page stored in the first buffer memory 161 and the image data for the upper page stored in the second buffer memory 162 to form complete image data. .

Next, the operation of the optical reader NA will be described. The operation is performed in the following procedure.
[Procedure 1]
As shown in the upper left of FIG. 2, first, the bankbook N in the spread state is transported in the forward direction (in the direction of arrow P in FIG. 2) by the transport means 11, and the passbook N is scanned by the scanner 13 and the read data storage control means 152. Is read into the first buffer memory 161.

  At the same time, the passbook length measuring means 151 measures the length of the passbook N. In this case, reading is started by using another passbook detection sensor or the like, and image data before and after the position where the passbook actually exists are also taken into the first buffer memory 161 as “image data at the time of forward reading”. The image of the passbook is bright (white), and the images other than the passbook are read dark (black), so the positions where the light and dark are switched are the front and end of the passbook. Therefore, the passbook length measuring means 151 knows the passbook length by counting the number of bits from the front end to the end.

  Then, the data dividing means 153 calculates a half of the measured passbook length to obtain the data cutout length, and, as shown in the upper middle part of FIG. As shown in the right side of FIG. 2, the read data storage control unit 152 cuts out the image data corresponding to the data cut-out length from the position corresponding to the position before the end of the passbook N of “image data at the time of reading”. And stored in the lower page image data storage area 163b of the third buffer memory 163. As a result, only the image data of the lower page LP of the passbook is stored in the third buffer memory 163 during the forward transfer of the passbook.

[Procedure 2]
Subsequently, as shown in the lower left side of FIG. 2, the scanner 13 and the read data are conveyed while the bankbook N held in the back of the bankbook transport path is transported in the reverse direction (in the direction of arrow M in FIG. 2) by the transport unit 11. The storage control means 152 takes “image data at the time of reverse reading” of the bankbook N into the second buffer memory 162. Since the passbook N passes through the scanner 13 from the lower page LP to the upper page UP, the “image data at the time of reverse reading” stored in the second buffer memory 162 is image data whose top and bottom are inverted.

  As in the case of the procedure 1, the passbook length measuring means 151 measures the length of the passbook N. Similarly to the case of the procedure 1, one half of the measured length of the passbook N is calculated as the data cut-out length, and is taken into the second buffer memory 162 as shown in the middle lower side of FIG. Further, the image data corresponding to the data cut-out length is cut out from the position corresponding to the position before the end of the passbook N of “image data at the time of reverse reading”, and the read-out data storage control means 152 reads the cut-out image data in FIG. As shown on the right side, the data is stored in the upper page image data storage area 163a of the third buffer memory 163. In this case, since the cut-out image data is data when the bankbook N is conveyed in the reverse direction, the data composition unit 154 stores the image data so that it is upside down from that in the procedure 1. That is, the lower page image data obtained in the procedure 1 and the upper page image data obtained in the procedure 2 are vertically moved in the same manner as the upper page UP and the lower page LP of the passbook N are continuous in the vicinity of the stitch F. The images are combined so as to be continuous and stored in the third buffer memory 163 as complete image data. As a result, the image data of the upper page UP and the lower page LP is stored in a complete form.

[Procedure 3]
When the processing of the above procedure 2 is completed, the image analysis means 155 of the arithmetic control unit 15 performs image analysis processing on the complete image data. Therefore, a correct image analysis processing result can be obtained.

[Other embodiments]
Either forward reading or backward reading of the bankbook may be performed first. The passbook length measuring means can use other known methods instead of the method of analyzing the image data as described above. For example, it is possible to install an optical passbook detection sensor separate from the scanner 13 and measure the passbook length based on the signal from the passbook detection sensor and the number of transport steps.

  Further, the cut-out length of the image data is not necessarily exactly one half of the measured passbook length. This is because the measured passbook length is measured longer or shorter than actual depending on the printer mechanism and scanner characteristics. It is desirable to adjust the cutout length so that optimal image data can be obtained through experiments and demonstrations.

  In the above, the embodiment in the case where the scanner is fixed and the bankbook is transported has been described, but the present invention is not carried in the bankbook, and the embodiment in the case where the scanner and the bankbook detection sensor are moved also includes: Applicable.

NA Optical reader 11 Conveying means 12 Passbook detection sensor (detecting means)
13 Scanner (reading means)
14 Print head (printing means)
15 arithmetic control unit 16 storage unit 161 first buffer memory 162 second buffer memory 163 third buffer memory N passbook UP upper page LP lower page F binding

Claims (3)

  The first step of reading the passbook in a two-page spread with a contact scanner in one direction and storing the image data read from the lower page of the passbook, and the image data read from the upper page of the passbook in the opposite direction The second step of storing the image data, the third step of combining the image data read from the lower page and the image data read from the upper page so that the upper page and the lower page are continuous to form complete image data, A passbook optical reading method comprising: a fourth step of performing image analysis processing on image data. In the passbook optical reader that reads the spread book with a contact scanner and analyzes the read image data,
A first buffer memory for storing image data of the lower page when the passbook in the spread state is read in one direction by the contact scanner, and image data of the upper page when the same passbook is read in the reverse direction by the contact scanner A second buffer memory for storing the image data, and a storage unit having a third buffer memory for storing complete image data to be described later, the lower page image data stored in the first buffer memory, and the upper page stored in the second buffer memory The complete image data is formed by combining the image data of the upper page with the end of the image data of the upper page so that the start of the image data of the lower page is continuous, stored in the third buffer memory, and the third An optical reading of a passbook, comprising an arithmetic control unit for performing image analysis processing on complete image data stored in a buffer memory Apparatus. The optical reader for a passbook according to claim 2,
The arithmetic control unit counts the number of bits between light and dark switching times of the image data of the passbook obtained by the contact scanner, or the signal from the passbook detection sensor provided in the passbook transport path and the number of transport steps Based on the above, a passbook length measuring means for measuring the length of the passbook,
The half of the measured passbook length is taken as the length of the lower page, the image data for the lower page is cut out from the image data stored in the first buffer memory, stored in the third buffer memory, and the measured passbook length A data dividing means for cutting out the image data for the upper page from the image data stored in the second buffer memory and storing it in the third buffer memory, with one half of the length being the upper page length;
Data combining means for connecting the end of the image data for the upper page stored in the third buffer memory so that the start of the image data for the lower page is continuous and storing it as complete image data;
A passbook optical reader comprising: image analysis means for performing image analysis processing on complete image data stored in a third buffer memory.

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