KR101409454B1 - Apparatus and method of reading passport for acquiring high-quality images - Google Patents

Abstract

The present invention relates to an apparatus for reading a passport having a first zone including optical information (P) of a traveler. The apparatus of the present invention includes a housing which has a first area, on an upper plane, having a center area where the first zone is placed and a peripheral area formed around the center area, and has an inner space; a color chart which is arranged on a bottom plane of the housing corresponding to the peripheral area, and includes a reference color having an inherent RGB value; a photographing part which is installed in the inner space, and generates and outputs an image signal including a first image signal and a second image signal obtained by photographing the center area and the peripheral area respectively; an RGB value calculation part which is connected to the photographing part, and calculates the reference color included in the second image signal and an RGB value of the first image signal; and a control part which is connected to the RGB value calculation part, and comprises an RGB control part controlling the RGB value of the first image signal using the inherent RGB value and the RGB value of the reference color.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passport reading apparatus and method for acquiring high-

The present invention relates to a passport reading apparatus and method, and more particularly, to a passport reading apparatus and method capable of obtaining high-quality image information.

In general, a passport is a document issued by the government to citizens traveling to foreign countries, proving the nationality and identity of travelers, authorizing overseas travel, and asking for the protection of foreign governments. These passports were paper type document passports until recently, but recently, e-passports have been issued instead of these document type passports.

The ePassport is a passport containing an RFID tag (Radio-Frequency Identification Tag) into which identification information such as photographs, fingerprints, and irises can be input. As the spread of international crime and terrorism becomes a serious threat to national security Countries around the world are introducing such ePassport to enhance security through counterfeiting of passports and tampering, as well as to benefit the convenience of its citizens traveling abroad.

The passport-reading device captures the image of the passport by photographing the passport in which the traveler's information is stored, and confirms the identity information of the traveler using the acquired image information.

However, such a passport-reading apparatus has a problem that it can not acquire high-quality image information due to a difference in color temperature of a light source installed therein, a difference in distortion of the lens, and a difference in performance of the camera sensor.

Korean Patent Publication No. 10-2010-0103023 (2010.09.27.)

SUMMARY OF THE INVENTION The present invention provides a passport reading device and method capable of acquiring high-quality image information.

Other objects to be solved by the present invention will become more apparent from the following detailed description and the accompanying drawings.

According to an embodiment of the present invention, a passport-reading apparatus includes a central area in which the first zone is located and a center zone in which the first zone is located, A housing having a first region on its upper surface, the first region having a peripheral region formed around the central region and having an inner space; A color chart disposed on a lower surface of the housing corresponding to the peripheral region and including a reference color having a unique RGB value; A photographing unit installed in the internal space and generating and outputting a video signal including a first video signal and a second video signal photographed respectively by the central region and the peripheral region; An RGB value calculator connected to the photographing unit and calculating an RGB value of the reference color and the first image signal included in the second image signal; And an RGB adjusting unit connected to the RGB value calculating unit and adjusting an RGB value of the first image signal using the RGB value of the reference color and the inherent RGB value.

The RGB controller may adjust the RGB value of the first video signal by adding the difference value calculated by Equation (1) to the RGB value of the first video signal.

[Equation 1]

Difference value = the inherent RGB value - the RGB value of the reference color

The RGB controller may adjust the RGB value of the first video signal by multiplying the RGB value of the first video signal by the ratio calculated by Equation (2) below.

 &Quot; (2) "

The reference hue may include at least one of red (R), green (G), and blue (B) colors.

The reference hue may include a gray color having a unique gray density value.

The passport reader further includes a gray concentration value calculator connected to the photographing unit and calculating a gray density value of the reference color and the first image signal included in the second image signal, And a density adjustment unit connected to the density value calculation unit and adjusting a gray density value of the first video signal using a difference value between the density value of the reference hue and the inherent gray density value .

The color chart may include a plurality of reference colors, and the RGB controller may adjust the RGB values of the first image signal using the average value of the difference between the RGB value of the reference color and the unique RGB value.

The RGB values of the plurality of reference colors may be different from each other.

Wherein the central region and the peripheral region have a rectangular shape and the color chart includes a first color chart, a second color chart, a third color chart and a fourth color chart, respectively, arranged at the corners of the peripheral region, The controller adjusts the resolution of the first video signal using the distance between the reference colors of the first color chart, the second color chart, the third color chart, and the fourth color chart of the second video signal And a resolution setting unit.

Wherein the color chart has a first color chart, a second color chart, a third color chart, and a fourth color chart respectively disposed at corners of the peripheral region, A fifth color chart arranged between the color chart and the second color chart, a sixth color chart arranged between the second color chart and the third color chart, and a third color chart arranged between the third color chart and the fourth color chart, A seventh color chart disposed between the first color chart and the fourth color chart, and an eighth color chart disposed between the fourth color chart and the first color chart, wherein the control unit controls the fifth color chart, A sixth color chart, a seventh color chart, and an eighth color chart on the second video signal respectively corresponding to the positions of the reference colors of the seventh color chart and the eighth color chart and the color charts, Using the difference in distance from the position of the reference color It may compensate for distortion of the first video signal.

The RGB values of the reference hue may be equal to each other.

According to an embodiment of the present invention, a passport reading method includes: a generation step of generating a video signal including a first video signal and a second video signal, the passport reading method using the passport reading device; A reference color included in the second video signal and an RGB value of the first video signal; And adjusting an RGB value of the first image signal using an RGB value of a reference color included in the second image signal and an intrinsic RGB value of the reference color.

The adjusting step may include adding the difference value calculated by Equation (1) to the RGB value of the first video signal.

[Equation 1]

Difference value = the inherent RGB value - the RGB value of the reference color

The adjusting step may be a step of multiplying the RGB value of the first video signal by the ratio calculated by Equation (2).

&Quot; (2) "

According to another embodiment of the present invention, a passport reading method includes: a generation step of generating a video signal including a first video signal and a second video signal, the passport reading method using the passport reading device; A reference color included in the second video signal and a gray density value of the first video signal are calculated; And adjusting a gray density value of the first video signal using a difference between a reference gray level value included in the second video signal and a gray level value inherent to the reference gray level.

According to an embodiment of the present invention, high-quality image information can be acquired. Also, passport screening can be done quickly and accurately.

1 is a control block diagram of a passport reading apparatus according to an embodiment of the present invention;
2 is a detailed control block diagram of a passport reading device according to an embodiment of the present invention;
3 is a perspective view of a passport reading device according to an embodiment of the present invention;
4 is a perspective view showing a color chart installed in a passport reading device according to an embodiment of the present invention;
5 is a cross-sectional view of a passport reading device according to an embodiment of the present invention;
6 is a cross-sectional view illustrating a state in which a reflection plate is installed in a passport reading device according to an embodiment of the present invention;
7 is a view showing a state in which a passport is placed in a passport reading device according to an embodiment of the present invention;
8 is a configuration diagram of an antenna unit of a passport-reading apparatus according to an embodiment of the present invention;
9 is a color chart of a passport reading device according to an embodiment of the present invention.
10 is a diagram illustrating an operation principle in which a distortion-rate compensating unit of a passport-reading apparatus according to an embodiment of the present invention adjusts a distortion rate.
11 is a flowchart showing a control method of a passport reading apparatus according to an embodiment of the present invention.
12 is a flowchart showing a control method of a passport-reading apparatus according to an embodiment of the present invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a clearer description.

7 is a view illustrating a state in which a passport is placed in the passport reading device according to the embodiment of the present invention. Referring to FIG. 7, the passport 10 is a kind of document that certifies the identity or nationality of a person traveling abroad, and requests the other country to protect the passport 10. The first zone 11 and the second zone 12 ), And includes RFID tags 20 in which traveler information is recorded, and specific optical information such as characters, printed images, photographs or bar codes.

The RFID tag 20 is disposed in at least one of the first area 11 and the second area 12 and stores personal information of the traveler. The RFID tag 20 includes a tag antenna 21, a tag transceiver 22, (23) and a storage unit (24). On the other hand, the optical information P may be arranged in the first zone 11 and / or the second zone 12. [ The tag antenna 21, the tag transmission / reception unit 22, the tag control unit 23, and the storage unit 24 may be electrically connected to each other or may be connected through a wired / wireless network.

The tag antenna 21 is electrically connected to the tag transceiver 22 and outputs the radio frequency signal to the tag transceiver 22 when a radio frequency signal is received from the outside. At this time, electric power is generated in the tag antenna 21 by electromagnetic induction of a radio frequency signal. This electric power is used as a driving power for driving the tag controller 23 and the storage unit 24, (20) is operated.

The tag transmitting and receiving unit 22 is electrically connected to the tag control unit 23 and demodulates the radio frequency signal input from the tag antenna 21 and outputs the demodulated radio frequency signal to the tag control unit 23.

The tag control unit 23 is electrically connected to the tag transmission / reception unit 22 and the storage unit 24, identifies the information received from the passport reading device through the tag transmission / reception unit 22, Performs data processing such as access and / or update with respect to the identification information, and transmits the information requested by the passport reader through the tag transmitting / receiving unit 22 and the tag antenna 21 as a radio frequency signal.

FIG. 1 is a control block diagram of a passport reading apparatus according to an embodiment of the present invention, and FIG. 2 is a detailed control block diagram of a passport reading apparatus according to an embodiment of the present invention. 1 and 2, a passport reading device according to the present embodiment includes an RFID tag 20 in which tourist information is recorded, traveler information of a passport 10 including traveler's optical information P, The color chart 900, the photographing unit 400, the RGB value calculating unit 300, the density value calculating unit 350, the illuminating unit 400, and the illuminating unit 500. The housing 100, the antenna unit 200, A controller 450, a controller 500, a transmitter 600, and a receiver 700.

FIG. 3 is a perspective view of a passport reading apparatus according to an embodiment of the present invention, FIG. 4 is a perspective view showing a color chart installed in a passport reading apparatus according to an embodiment of the present invention, FIG. FIG. 6 is a cross-sectional view illustrating a state in which a reflection plate is installed in a passport reading apparatus according to an embodiment of the present invention. FIG. 9 is a view showing a passport reading apparatus according to an embodiment of the present invention. Fig.

3 to 6 and 9, the housing 100 is divided into a first area 110 and a second area 120 on the upper surface on which the passport 10 is placed in a three-dimensional shape such as a hexahedron. The first section 11 of the passport 10 is placed in the first section 110 of the housing 100 and the second section 12 of the passport 10 is placed in the second section 120 of the housing 100, .

The first region 110 includes a central region 112 through which the optical information P of the first region 11 of the passport 10 can be transmitted and a peripheral region 114 ). The central region 112 and the peripheral region 114 may have a rectangular shape so that the capturing unit 400 can accurately calculate the resolution and the distortion of the first image signal captured by the central region 112. The center region 112 is preferably made of a transparent material such as glass and the peripheral region 114 is preferably made of an opaque material.

The antenna unit 200 is installed on the upper surface of the housing 100 and includes a first antenna 210 installed in the first region 110 of the housing 100 and a second antenna 210 installed in the second region 120 of the housing 100. [ And a second antenna 220 installed thereon. The antenna unit 220 is connected to the transmitting unit 600 and the receiving unit 700. The first antenna 210 and the second antenna 220 are alternately turned on and off according to a control signal of the transmitting unit 600, Frequency signal. By doing so, interference between signals due to the simultaneous transmission of radio frequency signals between the first antenna 210 and the second antenna 220 can be prevented.

The first antenna 210 and the second antenna 220 are arranged adjacent to each other on the same plane on which the passport 10 is placed in the form of a polygonal loop and transmit a radio frequency signal when a control signal is received from the transmitter 600 do.

4, the color chart 900 is installed or formed on the lower surface of the housing 100 corresponding to the peripheral region 114 and includes the edge of the peripheral region 114 and the central portion of the width of the peripheral region 114 And the central portion of the longitudinal region of the peripheral region 114. The color chart 900 includes one or more reference colors 905 having unique RGB values (R value, G value, B value). The RGB values (R value, G value, B value) are color models in which color information is quantified. The color values are represented by red, green, and blue, Various colors can be specified. The reference hue 905 may be red (R), green (G), blue (B), gray (H), or ultraviolet non-mark (F). Here, the ultraviolet specific index (F) may be a fluorescent color as a mark for emitting light for only ultraviolet illumination. At this time, the RGB values (R value, G value, B value) of the gray (H) have R value = G value = B value and have a unique gray density value. For example, gray (H) may have a native gray concentration value of 0% (white), 5%, 50%, 75% and 100% (black).

9, a color chart 900 includes a first color chart 910, a second color chart 920, a third color chart 930, and a fourth color chart 930, which are respectively disposed at the corners of the peripheral area 114. [ A fifth color chart 950 arranged between the first color chart 910 and the second color chart 920 and a second color chart 950 arranged between the second color chart 920 and the third color chart 930 A seventh color chart 970 arranged between the third color chart 930 and the fourth color chart 940 and a sixth color chart 970 arranged between the third color chart 930 and the first color chart 940. [ And an eighth color chart 980 disposed between the first and second color charts 910 and 910. [ The resolution of the first video signal can be adjusted using the distance difference between the positions of the reference hues 905 included in the color chart 900 and the distortion of the first video signal can be compensated.

5 and 6, the photographing unit 400 is installed in the inner space of the housing 100 and electrically connects to the RGB value calculating unit 300, the concentration value calculating unit 350 and the control unit 500 Or through a wired or wireless network. The photographing part 400 photographs the first image signal of the first zone 11 of the passport 10 photographed through the central area 112 of the first zone 110 of the housing 100 and the first image signal of the peripheral zone 114, And generates and outputs a video signal including a second video signal obtained by photographing a lower surface of the housing 100 corresponding to the video signal. The image signal thus outputted is input to the RGB value calculating unit 300 to be described later.

The RGB value calculation unit 300 calculates the reference color 905 included in the second image signal input from the image sensing unit 400 and the RGB values (R value, G value, B value) of the first image signal, (500).

The density value calculating unit 350 calculates the gray level of the reference gray level 905 and the gray level of the first video signal included in the second video signal input from the image sensing unit 400 and transmits the gray level value to the controller 500.

5 and 6, the illumination unit 450 is installed inside the housing 100 and irradiates light toward the first region 110 of the housing 100. One or more lighting units 450 may be installed, and may irradiate visible light, infrared light, or ultraviolet light. The illumination unit 450 may include an incandescent lamp, a fluorescent lamp, an LED lamp, an ultraviolet lamp, and the like.

The control unit 500 is connected to the photographing unit 400, the illuminating unit 450, the RGB value calculating unit 300, the concentration value calculating unit 350, the transmitting unit 600, and the receiving unit 700 electrically or through a wired / And controls the photographing unit 400, the illuminating unit 450, the transmitting unit 600, and the receiving unit 700. Specifically, the control unit 500 outputs a control signal to the transmitter 600 so that the first antenna 210 and the second antenna 220 alternately transmit radio frequency signals at regular intervals. When receiving a response signal for a radio frequency signal from the RFID tag 20, the receiving unit 700 demodulates the response signal to extract data, and transmits the extracted data to the control unit 500. At this time, the control unit 500 reads and processes the traveler information extracted by the receiving unit 700 and the optical information P of the traveler transmitted by the photographing unit 400 to perform a service such as inquiry and authentication of the traveler do.

8 is a configuration diagram of an antenna unit of a passport reading apparatus according to an embodiment of the present invention. Referring to FIG. 8, the controller 500 transmits a control signal to the other antenna while the RFID tag 20 communicates with one of the first antenna 210 and the second antenna 220 I never do that. Specifically, when a radio frequency signal input to the receiving unit 700 is input through the first antenna 210, the control unit 700 outputs a control signal so that a radio frequency signal is transmitted only through the first antenna 210, And outputs a control signal such that the radio frequency signal is transmitted only through the second antenna 220 when the radio frequency signal input through the second antenna 220 is input. This prevents interference between the first antenna 210 and the second antenna 220 due to the operation of the second antenna 220 during communication between the first antenna 210 and the RFID tag 20 .

2, the control unit 500 includes an RGB adjustment unit 510, a density adjustment unit 520, a resolution setting unit 530, a distortion rate compensation unit 540, and an ultraviolet specific value sensing unit 550 .

The RGB controller 510 adjusts the RGB values of the first video signal using the RGB values of the reference color 905 included in the second video signal and the RGB values inherent to the reference color 905. The RGB adjusting unit 510 may adjust the RGB value of the first video signal by adding the difference value calculated by Equation 1 below to the RGB value of the first video signal. Also, the RGB adjusting unit 510 can adjust the RGB value of the first video signal by multiplying the RGB value of the first video signal by the ratio calculated by Equation (2) below. Accordingly, the RGB values of the first video signal are close to the intrinsic RGB values of the first zone 11 of the passport 10, so that the natural colors of the first zone 11 can be displayed. The RGB adjustment unit 510 may adjust the RGB values of the first image signal using the average values of the difference between the RGB values of the reference hue 905 and the unique hue values of the reference hue 905 of the second image signal.

[Equation 1]

Difference value = RGB value inherent to the reference hue 905 - RGB value of the reference hue 905 calculated by the RGB value calculating unit 300

&Quot; (2) "

The density adjusting unit 520 uses the difference value between the gray density value of the reference hue 905 included in the second video signal calculated by the density value calculating unit 350 and the gray density value inherent to the reference hue 905 The gray level value of the first video signal can be adjusted. Thus, the gray density value of the first video signal is able to display the first zone 11 close to the intrinsic gray density value of the first zone 11 of the passport 10.

The resolution setting unit 530 sets the resolution of the first video signal using the color chart 900 of the second video signal. The resolution setting unit 530 sets the resolution of the second video signal between the reference color 905 of the first color chart 910, the second color chart 920, the third color chart 930 and the fourth color chart 940 The resolution of the first video signal is set using the area of the rectangle of FIG. The resolution setting unit 510 sets the resolution of the first video signal to a value calculated by dividing the area of the rectangle by the area of the unit pixel. Accordingly, it is possible to output the first video signal of high quality.

For example, the area of the quadrangle is determined by the horizontal length between the reference color 905 of the first color chart 910 and the reference color 905 of the second color chart 920, the second color chart 920, Can be calculated by multiplying the vertical length between the reference colors 905 of the third color chart 930. The reference color 905 may be the same color, and it is preferable that the reference color 905 is white (gray concentration 0%) or black (gray concentration 100%) in order to calculate an accurate resolution.

FIG. 10 is a diagram illustrating an operation principle in which a distortion-rate compensating unit of a passport-reading apparatus according to an embodiment of the present invention adjusts a distortion rate. Referring to Figure 10, the distortion compensation unit 540 calculates the reference color 905 of the fifth color chart 950, the sixth color chart 960, the seventh color chart 970, and the eighth color chart 980, The distortion of the first video signal is compensated by using the difference in distance between the original position and the distortion position on the first video signal of the first video signal. In this case, the original position refers to the position of the reference hue 905 when the distortion of the first video signal is 0 [%], and the distortion position refers to the position of the reference hue 905 when the distortion of the first video signal is not 0 Location.

For example, when the reference color 905 of the fifth color chart 950 and the sixth color chart 960 is curved to the center of the first area 110 than the original position as shown in Fig. 10 (a) , The Y-axis distortion rate Y of the first video signal can be expressed as (A * 100) / B [%], and the fifth color chart 950 and the reference color 905 of the sixth color chart 960 to the original position. Similarly, when the reference hue 905 of the seventh color chart 970 and the eighth color chart 980 is curved to the center of the first region 110 from the original position, the X-axis distortion rate (X) can be expressed as (A * 100) / B [%], and the seventh color chart 970 and the eighth color chart 980 are added to the first image signal by the X- The distortion position of the reference hue 905 of the reference hue 905 is moved to its original position.

In the case where the reference hue 905 of the fifth color chart 950 and the sixth color chart 960 is curved to the outside of the first area 110 than the original position as shown in Fig. 10 (b) The Y-axis distortion rate Y of the video signal can be expressed as (A * 100) / B [%], and the fifth color chart 950 and the second color chart 950 can be obtained by subtracting the Y- The distortion position of the reference color 905 of the six-color chart 960 is moved to the original position. Similarly, when the reference hue 905 of the seventh color chart 970 and the eighth color chart 980 is curved to the outside of the first region 110 from the original position, the X-axis distortion rate (X) can be expressed by (A * 100) / B [%], and the seventh color chart 970 and the eighth color chart 980 can be obtained by subtracting from the first image signal by this X- The distortion position of the reference hue 905 of the reference hue 905 is moved to its original position.

The ultraviolet ray specific marker detection unit 550 is used to determine whether the illumination unit 450 is normally operating when the illumination unit 450 emits ultraviolet rays. (F) contained in the ultraviolet light. At this time, the controller 500 may generate a failure signal when the ultraviolet ray table detecting unit 550 does not detect the ultraviolet ray table F.

Referring to FIG. 6, reflection plates 310 and 320 may be installed in the inner space of the housing 100 of the passport-reading apparatus according to the present embodiment. The reflector 310 is disposed below the central region and reflects image information of the first region 11 of the passport 10 provided through the central region to the reflector 320. The reflection plate 320 is disposed on one side of the reflection plate 310 and reflects the image information of the first area 11 reflected by the reflection plate 310 to the photographing unit 400. That is, the image of the first zone 11 of the passport 10 and the image path of the photographing unit 400 are made long, and the image of the first zone 11 of the passport 10 and the wide angle So that the degree of freedom can be reduced.

The transmission unit 600 is electrically connected to the first antenna 210, the second antenna 220 and the control unit 500 and transmits the control signal transmitted from the control unit 500 to the first antenna 210 and the second antenna 220).

The receiving unit 700 is electrically connected to the first antenna 210, the second antenna 220 and the control unit 500 and is connected to the first antenna 210 or the second antenna 220 from the RFID tag 20, When a response signal to the frequency signal is input, the response signal is demodulated to extract traveler information, and then transmitted to the control unit 500.

11 and 12 are flowcharts illustrating a control method of a passport-reading apparatus according to an embodiment of the present invention. A control method of the passport-reading apparatus according to the present embodiment will be described with reference to Figs. 11 and 12. Fig.

First, the photographing unit 400 generates and outputs image signals including a first image signal and a second image signal, which respectively photograph the central region 112 and the peripheral region 114 of the housing 100 (S11. S21).

Next, the RGB value calculating unit 300 calculates the reference color 905 and the RGB values of the first video signal included in the second video signal output from the photographing unit 400, and transmits the RGB values to the controller 500 S12). The RGB calculation unit 300 calculates the reference color 905 and the RGB values of the first video signal included in the second video signal only at the initial driving time of the passport reading device and transmits the calculated RGB values to the control unit 500, Only the RGB values of the first video signal may be calculated and transmitted to the control unit 500. [

Next, the RGB adjusting unit 510 adjusts the RGB values of the first video signal using the RGB values of the reference color 905 and the unique RGB values of the reference color 905 included in the second video signal (S13 ). The RGB adjusting unit 510 may adjust the RGB value of the first video signal by adding the difference value calculated by Equation (1) to the RGB value of the first video signal. In addition, the RGB controller 510 may adjust the RGB value of the first video signal by multiplying the RGB value of the first video signal by the ratio calculated by Equation (2). Accordingly, the RGB values of the first video signal are close to the intrinsic RGB values of the first zone 11 of the passport 10, so that the natural colors of the first zone 11 can be displayed. The RGB adjustment unit 510 may adjust the RGB values of the first image signal using the average values of the difference between the RGB values of the reference hue 905 and the unique hue values of the reference hue 905 of the second image signal.

The density value calculating unit 350 may calculate the reference color 905 and the gray density value of the first video signal included in the second video signal output from the photographing unit 400 and transmit the gray density value to the controller 500 (S22). The density value calculating unit 350 calculates the gray level of the reference gray level 905 and the gray level of the first video signal included in the second video signal only at the initial driving time of the passport reading apparatus and transmits the gray level value to the control unit, Only the gray density value of the first video signal can be calculated and transmitted to the control unit 500. [

Here, the density adjusting unit 520 sets the difference value between the gray density value of the reference hue 905 included in the second video signal calculated by the density value calculating unit 350 and the gray density value inherent to the reference hue 905 The gray density value of the first video signal can be adjusted (S23). Thus, the gray density value of the first video signal is able to display the first zone 11 close to the intrinsic gray density value of the first zone 11 of the passport 10.

As a result, the passport-reading apparatus according to the present embodiment arranges the color chart including the reference color having the unique RGB value in the peripheral region of the housing, and sets the RGB value of the reference color included in the second image signal, The image quality of the first image signal can be improved by adding or multiplying the difference value or the ratio of the RGB value to the RGB value of the first image signal.

Also, the image quality of the first image signal can be improved by using the difference value between the gray density value of the reference color included in the second image signal and the intrinsic gray density value of the reference color.

Although the present invention has been described in detail by way of preferred embodiments thereof, other forms of embodiment are possible. Therefore, the technical idea and scope of the claims set forth below are not limited to the preferred embodiments.

10: Passport 11: Zone 1
12: second zone 20: RFID tag
21: tag antenna 22: tag transmission /
23: tag control unit 24:
100: housing 110: first region
112: center area 114: peripheral area
120: second area 200: antenna part
210: first antenna 220: second antenna
310, 320: reflection plate 400:
500: control unit 600:
700: Receiver

Claims (15)

A passport reading device for reading a passport having a first zone including optical information (P) of a traveler,
A housing having a first region having a central region in which the first region is placed and a peripheral region formed around the central region, the upper region having an inner space;
A color chart disposed on a lower surface of the housing corresponding to the peripheral region and including a reference color having a unique RGB value;
A photographing unit installed in the internal space and generating and outputting a video signal including a first video signal and a second video signal photographed respectively by the central region and the peripheral region;
An RGB value calculator connected to the photographing unit and calculating an RGB value of the reference color and the first image signal included in the second image signal;
A controller connected to the RGB value calculating unit and configured to adjust an RGB value of the first video signal using the RGB value of the reference color included in the second video signal and the unique RGB value; Included passport reading device.
The method according to claim 1,
The RGB control unit
And adds the difference value calculated by the following equation (1) to the RGB value of the first video signal.
[Equation 1]
Difference value = the inherent RGB value - the RGB value of the reference color included in the second video signal
The method according to claim 1,
The RGB control unit
And multiplies the RGB value of the first video signal by the ratio calculated by the following equation (2).
&Quot; (2) "
Ratio = (the original RGB value) / (the RGB value of the reference color included in the second video signal)
The method according to claim 1,
Wherein the reference color included in the color chart includes at least one of red (R), green (G), and blue (B) colors.
The method according to claim 1,
Wherein the reference color included in the color chart includes a gray color having a unique gray density value.
The method of claim 5,
The passport reading device
And a gray density value calculator connected to the photographing unit and calculating a gray density value of the reference color and the first video signal included in the second video signal,
The control unit
And a density adjustment unit connected to the density value calculation unit and adjusting a gray density value of the first video signal using a difference value between the density value of the reference color and the inherent gray density value included in the second video signal, Further comprising: a passport reading unit for reading the passport.
The method according to claim 1,
The color chart comprising a plurality of reference colors,
The RGB control unit
Wherein the RGB value of the second video signal is adjusted using the RGB value of the plurality of reference colors included in the second video signal and the average value of the difference values of the plurality of unique RGB values included in the second video signal, .
The method of claim 7,
Wherein the RGB values of the plurality of reference colors included in the second video signal are different from each other.
The method according to claim 1,
Wherein the central region and the peripheral region have a rectangular shape,
Wherein the color chart includes a first color chart, a second color chart, a third color chart and a fourth color chart, each of which is disposed at an edge of the peripheral region,
The control unit
A resolution setting for adjusting a resolution of the first video signal using a distance between the reference colors of the first color chart, the second color chart, the third color chart, and the fourth color chart of the second video signal; Further comprising: a passport reading unit for reading the passport.
The method according to claim 1,
Wherein the central region and the peripheral region have a rectangular shape,
The color chart
A first color chart, a second color chart, a third color chart, and a fourth color chart, which are respectively arranged at the corners of the peripheral region, and a fifth color chart A sixth color chart arranged between the second color chart and the third color chart, a seventh color chart arranged between the third color chart and the fourth color chart, And an eighth color chart arranged between the first color chart,
The control unit
A fifth color chart on the second image signal corresponding to the positions of the reference colors of the fifth color chart, the sixth color chart, the seventh color chart and the eighth color chart and the color charts, And a distortion compensation unit for compensating a distortion rate of the first video signal by using a distance difference between a color chart, a seventh color chart, and a position of a reference color of an eighth color chart.
The method according to claim 9 or 10,
Wherein the RGB values of the reference color included in the second video signal are identical to each other.
A passport reading method using the passport reading apparatus according to claim 1,
A generation step of generating a video signal including a first video signal and a second video signal;
A reference color included in the second video signal and an RGB value of the first video signal; And
And adjusting an RGB value of the first video signal using an RGB value of a reference color included in the second video signal and an intrinsic RGB value of the reference color.
The method of claim 12,
The adjusting step
And adding the difference value calculated by Equation (1) to the RGB value of the first video signal.
[Equation 1]
Difference value = the inherent RGB value - the RGB value of the reference color included in the second video signal
The method of claim 12,
The adjusting step
Is a step of multiplying the RGB value of the first video signal by the ratio calculated by the following formula (2).
&Quot; (2) "
Ratio = (the original RGB value) / (the RGB value of the reference color included in the second video signal)
A passport reading method using the passport reading apparatus according to claim 6,
A generation step of generating a video signal including a first video signal and a second video signal;
A reference color included in the second video signal and a gray density value of the first video signal are calculated; And
And adjusting a gray density value of the first video signal using a difference between a reference gray level value included in the second video signal and a gray level value inherent to the reference gray level.

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