JPH08189860A - Print sensing device, transaction processing device, and print sensing method - Google Patents

Abstract

PURPOSE: To correct the reflectance and accurately detect the existence of printing when the reflectance drops by judging as to whether there is a printing on a medium or not on the basis of a print judging reference which has been set. CONSTITUTION: A drive circuit 24 drives an LED array 25 and a CCD image sensor 26, and when a bankbook, etc., (printing medium) 13 is led to the printing data sensing position, light from the array 25 is cast onto the printing column of the bankbook 13. The reflected beam of light thereby is sensed through a lens 28 as the printing data by the sensor 26. The printing data is amplified by an amplifier 29, converted by an A/D converter 30, and subjected to analysis made by a CPU 21. The CPU 21 sets a print judging reference in accordance with the value of the analyzed data and stores the obtained result in a non- volatile RAM 31. From the set vale of the reference, judgment is made as to whether the ground color of the bankbook 13 influences the sensing of existence of printing or not. If yes, the reflectance as the reference is corrected, and sensing whether printed or unprinted is made precisely with the reflectance in well accordance with the ground color.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a print detecting device such as an internal structure of an automated teller machine, and more specifically, it clearly distinguishes a printed surface and a non-printed surface of a printing medium such as a bankbook. The present invention relates to a print detection device, a transaction processing device, and a print detection method that can be performed.

[0002]

2. Description of the Related Art Generally, in this type of print detecting device, when a print medium 72 passes a position of the print medium detecting device 71, a printing surface of the print medium 72 is a light source 73 as shown in FIG. The reflected light ray 74 irradiated at this time is detected by the CCD image sensor 76 through the magnifying lens 75, and the portion having the highest detected amount of reflected light is set as the reflection reference to obtain the reflectance of each part. Whether or not the print medium 72 is printed is determined from the reflectance.

However, when the reflectance is used as a criterion, if the color of the illuminating light source and the background color (background color) of the surface of the printing medium are complementary colors, the reflectance is lowered and the background color is changed. It will be erroneously detected as the printed part. For this reason, the print color and the background color are limited, and the print color cannot be freely selected. Further, it is conceivable to adopt a multicolor light source that emits light by switching to a light source color suitable for the background color, but there is a problem that the cost becomes high.

[0004]

Therefore, according to the present invention, when it is determined that there is a possibility that the reflectance of the print determination reference will decrease and erroneous detection may occur when determining the presence or absence of printing, the reflectance is corrected to be accurate. Printing detection device, which can detect
A transaction processing device and a print detection method are provided.

[0005]

According to the first aspect of the present invention,
Ground color density detecting means for detecting the ground color density of the print medium, print standard setting means for setting the print standard of the print medium based on the detection result of the ground color density detecting means, and the setting result of this print standard setting means The print detection device is provided with a determination unit that determines the presence or absence of printing on the print medium based on the above.

According to the second aspect of the present invention, there is provided a print detecting device including a background color density detecting means for determining the background color density based on the print density distribution of the print medium.

According to a third aspect of the present invention, there is provided a transaction processing device including a print detection device for determining whether or not a print medium is printed.

According to a fourth aspect of the present invention, the background color density of the print medium is detected, the print standard of the print medium is set based on the detected background color density, and the print medium is printed on the basis of the set print standard. The printing detection method is provided with a printing presence / absence determining unit for determining the presence / absence of printing.

[0009]

According to the present invention, when determining the presence or absence of printing on the print medium, the ground color density detecting means detects the ground color density of the print medium and sets the print reference based on the detection result of the ground color density. The means sets the printing standard of the printing medium, and the judging means judges the presence or absence of printing on the printing medium based on the setting result of the printing standard.

Further, when detecting the background color density of the print medium,
The background color density detecting means determines the background color density based on the print density distribution of the print medium.

Further, the transaction processing device provided with the print detection device determines whether or not there is printing on the print medium. For example, AT
When a deposit passbook is used in M, the unprinted column of the passbook is accurately grasped based on the result of printing of the deposit passbook, and the transaction content is printed in this unprinted column for transaction processing.

Further, when determining the presence / absence of printing on the print medium, the print presence / absence determining means detects the background color density of the print medium, and sets the print reference of the print medium based on the detected background color density. Is a print detection method for determining the presence / absence of printing on a print medium based on the set print standard.

[0013]

As described above, when the presence or absence of printing on the print medium is detected, the ground color of the print medium is detected, and it is determined whether or not the ground color affects print detection, and the influence is detected. When it is determined that the print reference is exerted, the print reference is changed to the optimum value according to the background color and the detection is performed, so that the detection determination can always be performed accurately.

Therefore, even if the color of the irradiated light source and the background color of the surface of the printing medium are complementary colors, there is no risk of erroneous detection, and the printing color and background color are not limited, and these colors can be freely selected. Can be selected to improve the design, and the light source color is not limited to a white light source or a multicolor light source having a high reflectance, so that an economical light source can be used.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a passbook processor 11 which is internally provided in an automatic teller machine (ATM). The passbook processor 11 inserts a passbook 13 inserted into a passbook insertion port 12 inwardly through a passbook transport path 14. The print data of the passbook 13 is detected by the print detection device 15 provided in the middle of the passage of the passbook conveyance path 14, and based on the detected data, the printhead 16 in the subsequent stage prints on the passbook.

FIG. 2 shows a block diagram of a control circuit of the print detection device 15. The CPU 21 controls each circuit device according to a program stored in the ROM 22, and the control data is stored in the RAM 23 so as to be readable.

The drive circuit 24 including the timing circuit is L
ED array (light source) 25 and CCD image sensor 2
When the passbook 13 is driven to the print data detection position by driving the LED 6, the LED array 25 illuminates the print field of the passbook, and the illuminated reflected light beam is the glass plate 27 and the magnifying lens 28.
The print data is detected by the CCD image sensor 26 via the. For example, as shown in FIG. 3, the print data of the printed 13a or the unprinted 13b is clearly distinguished and detected for each print line of the passbook 13.

The print data thus detected by the CCD image sensor 26 is amplified by the amplifier 29, and then the A / D
The converter 30 performs analog-to-digital conversion and RAM2
3, and the CPU 21 analyzes it.

Further, the CPU 21 sets a print judgment standard according to the value of the analyzed print data and sets the nonvolatile RAM 31.
It is determined whether or not the background color (background color) of the passbook has an effect on detecting the presence / absence of printing from the set value of the print determination standard. The reflectance is corrected to accurately detect the printed 13a or unprinted 13b with the reflectance according to the ground color.

As shown in FIG. 4, the CPU is C
The reflectance (PCS value) of each pixel is obtained from the passbook detection data read by the CD image sensor, a frequency distribution (histogram) of this reflectance is created, and the degree of influence of the background color of the passbook is determined from this frequency distribution. A reference ground color determination section a is determined, and the presence or absence of the influence of the reflectance for each background color is determined based on the number of pixels included in the ground color determination section a.

The reflectance (PCS value) is a measurement of the degree of light reflection of the ground color when the print field of the passbook is illuminated, and its measurement formula is shown below.

PCS value = (Rw-Rp) / Rw PCS: Print, Contrast, Signal Rw: Maximum reflectance in the target area Rp: Reflectance at an arbitrary measurement point. When the reflectance of the ground color is obtained by setting the reflectance in a range that is easily distinguishable from the print color, for example, in the range of 0.1 to 0.3 (reference detection level), if the number of pixels in this range is small, It is recognized that the ground color data thus detected is less affected by the reflectance, and when printed on the ground color of this passbook, the presence or absence of printing can be clearly distinguished.

On the other hand, as shown in FIG. 5, when the number of pixels in the ground color judgment section a is more than a certain value, the ground color of this passbook is greatly affected by the reflectance, and the ground color and the print color are At this time, the ground color determination section a
The reflectance of the reference detection level (0.1 to 0.3) L1 to the correction detection level (for example, 0.3 to 0.4) L2 to obtain the reflectance of the level L2 suitable for the ground color. The presence or absence of printing is detected and determined from.

As described above, when the background color of the bankbook used for transactions is detected in advance and the background color of the bankbook affects the detection of the printing color, the reflectance is suitable for the ground color detection determination. Since it is possible to change the setting to, it is possible to accurately capture the print density distributions of various passbooks and to accurately detect whether printing has been performed or not.

Next, the processing operation of the print detection device 15 will be described with reference to FIG.
This will be described with reference to the flowchart in FIG. When the passbook 13 is used for transaction, when the passbook 13 passes through the position of the inner print detection device 15, the ground color of the print column of the passbook 13 and the print data of the printed 13a and unprinted 13b are read by the CCD image sensor 26. The read print data is transferred to the RAM 23 for storage and management, and the CPU 21 starts the analysis processing of the print data transferred to the RAM 23.

When analyzing the print data, the CP
U21 sequentially executes the analysis processing per line (step n1), and at this time, the CPU 21 generates the density distribution of the background color from the passbook detection data read by the CCD image sensor 26. This is to obtain the reflectance (PCS value) for each pixel from the detected print data, and determine the ground color determination section a for determining the influence of the background color of the passbook from this reflectance (step n2
), The density distribution for determining the presence or absence of the influence of the reflectance is obtained from the number of pixels included in the ground color determination section a (step n3). When the judgment is made, since the influence of this reflectance is great (step n4), the setting is changed to the detection level of the dark background color, and the reflectance of the detection level suitable for this background color is set, and then the passbook print field is detected. Judgment is made, and the printed 13a and unprinted 13b for each printing line are accurately detected and judged (steps n5 to n
6).

When it is determined that the ground color density is close to a white background and the influence of the reflectance is small when determining the tint of the ground color,
Preprinted 13a in the print column of the passbook at the detection level of the light ground color
And unprinted 13b are accurately detected and determined (step n7
).

As described above, when the presence or absence of the printing of the passbook is detected, the ground color of the passbook is detected prior to this detection, and it is determined whether or not the ground color affects the detection of printing. When it is determined that the influence is exerted, the detection level of the reflectance is changed to the optimum value for detection, and therefore it is possible to accurately detect and determine whether printing has been performed or not. Therefore, even if the color of the illuminated light source and the background color of the passbook surface are complementary colors, they will not be erroneously detected, and the printing color and background color are not limited, and these colors can be freely selected. Since the designability can be improved and the light source color is not limited to a white light source or a multicolor light source having high reflectance, an economical light source can be used.

In the correspondence between the present invention and the configuration of the above-described one embodiment, the print detection device of the present invention corresponds to the print detection device 15 of the embodiment, and hereinafter, similarly, the transaction processing device,
Compatible with ATM passbook processor 11, the print medium is passbook 1
3 corresponds to the print standard of the print medium, and the background color determination section a
Corresponding to the reference detection level L1 and the correction detection level L2, the ground color density detection means, the print reference setting means, the determination means, and the presence / absence determination of the printing are the CCD image sensor 26.
The present invention is not limited to the configuration of the above-described embodiment, although it corresponds to the optical reading system such as the above and the CPU 21 thereof.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a passbook processor including a print detection device according to the present invention.

FIG. 2 is a block diagram of a control circuit of the print detection device according to the present invention.

FIG. 3 is an enlarged view of an essential part showing already printed and unprinted data recorded in the print column of the passbook of the present invention.

FIG. 4 is a frequency distribution diagram of reflectance of the print detection device according to the present invention.

FIG. 5 is a frequency distribution chart of reflectance showing a reference detection level and a correction detection level of the print detection apparatus of the present invention.

FIG. 6 is a flowchart showing the processing operation of the print detection device of the present invention.

FIG. 7 is a side view of essential parts showing a detection state of a conventional print medium detection device.

[Explanation of symbols]

 11 ... passbook processor 13 ... passbook 13a ... printed 13b ... unprinted 15 ... print detection device 21 ... CPU 26 ... CCD image sensor a ... ground color determination section L1 ... reference detection level L2 ... correction detection level

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Claims (4)

[Claims] 1. A ground color density detecting means for detecting a ground color density of a print medium, a print standard setting means for setting a print standard of a print medium based on a detection result of the ground color density detecting means, and the print standard. A print detection apparatus including a determination unit that determines whether or not printing is performed on a print medium based on the setting result of the setting unit. 2. The print detecting apparatus according to claim 1, wherein the ground color density detecting means determines the ground color density based on the print density distribution of the print medium. 3. A transaction processing device comprising the print detection device according to claim 1 or 2 for determining whether or not printing is performed on a print medium. 4. A ground color density of a print medium is detected, a print standard of the print medium is set based on the detected ground color density, and the presence or absence of printing on the print medium is determined based on the set print standard. A printing detection method, comprising: a printing presence / absence determining unit for performing the printing.