KR101464171B1 - Universial video camera image test equipment - Google Patents

Abstract

The present invention relates to an image inspection apparatus provided therein with a chamber to inspect an image of a camera. The image inspection apparatus according to the present invention includes: a first door to open/close the chamber at a first positioning; and a head door part serving as a second door at a second positioning having a phase difference of 90 degrees from the first positioning. In addition, a color temperature and a color coordinate brightness are changed only by a white LED part serving as a first light source adjacent to the head door part to irradiate light to the chamber and having one group of multiple white light emitting devices (LED) which have different color temperatures and are arranged in the form of a matrix in an LED panel. The apparatus of the present invention serves as a reflective-type viewer at the first positioning. The apparatus may include a fluorescent lamp and a halogen lamp. In addition, the apparatus rotated at 90 degrees is used at the second positioning to serve as a transmission-type viewer. The apparatus may serve as a dark chamber by closing two doors.

Description

{UNIVERSIAL VIDEO CAMERA IMAGE TEST EQUIPMENT}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for inspecting an image, and more particularly to a technique for inspecting an image of a video camera in order to grasp or correct characteristics of an image of the video camera.

There are a variety of devices for capturing images. In the case of a video camera device of a subject, such as a digital camera, a CCTV camera, a PC camera, a mobile camera, or a camera built in a vehicle black box, it is necessary to test an image and check its characteristics. The characteristics of the image vary depending on the color temperature and illumination of the subject.

Patent Document 1 has a color temperature illuminating unit 27 composed of white LEDs having different color temperatures and an RGB illuminating unit 29 composed of R, G, and B tri-color LEDs. The color temperature illuminating unit 27 And the RGB illumination unit 29 to control the color temperature, illumination, and color. The high brightness white LED and the RGB LED are collected and the color, color temperature and brightness of the light are set by the superimposed light generated by the light. Patent Document 1 has pointed out that it is not suitable for accurate and precise image inspection because the characteristics of light are varied due to blackening phenomenon and adult flickering when an image of a fluorescent lamp driven by AC is examined as a light source.

However, when the RGB LEDs are used, the operating voltages of the three types of LEDs are different. In addition, when the desired color temperature and brightness are set by RGB, an error occurs in the set values over time, If any one of the errors occurs, the color temperature error is very large, which causes a serious problem in the reliability of the image inspection apparatus.

In addition, Patent Document 1 intentionally excluded a fluorescent lamp as a light source of a video image inspection apparatus, but this has caused an obstacle environment for image inspection. The fluorescent lighting environment is the most common indoor environment in which the camera is actually used. Patent Document 1 has a problem in that it can not provide an environment for testing image quality in all lighting environments, and can only test uniformity of light.

Moreover, the conventional apparatus is a transmissive light source dedicated device, which can not be used for a reflective light source, and can not be used in a dark room.

The inventor of the present invention has made a long effort to solve the above problems and propose a new approach.

Patent Document 1: Korean Patent No. 10-0863205

It is an object of the present invention to provide an integrated image inspection apparatus which can be used as a transmission type light source image inspection apparatus, a reflection type light source image inspection apparatus and a darkroom. Therefore, it is necessary to technically satisfy various demands for image inspection and environment of use, while at the same time securing excellent economic efficiency.

In addition, in examining an image, it is possible to use various combinations of four types of white LEDs having different electrical characteristics but different color temperatures to innovatively improve the error occurrence rate, thereby enabling a more stable image inspection. There is another purpose.

On the other hand, other unspecified purposes of the present invention will be further considered within the scope of the following detailed description and easily deduced from the effects thereof.

According to an aspect of the present invention, there is provided an image inspection apparatus having a chamber for inspecting an image of a camera, the apparatus comprising:

A first door that opens and closes the chamber in a first positioning and has a hole formed on a surface thereof, the hole having at least one cover communicating with an inner space of the chamber;

And a second position in a second position having a phase difference of 90 degrees from the first position, wherein the first positioning constitutes a head portion of the image inspection apparatus, and the functions of the control unit and the apparatus for controlling the functions of the apparatus A head door portion provided with a user interface for selecting and setting; And

And a white LED unit installed adjacent to the head door unit and provided as a first light source for irradiating the chamber with a plurality of white LEDs having different color temperatures arranged in a matrix on the LED panel,

(1) In the first positioning, a color chart attached to the inner wall of the chamber is inspected for an image taken by the camera under the environment of the reflected light source of the first light source,

(2) In the second positioning, the head door unit is opened and closed, the image inspection apparatus is rotated to a 90-degree rotation position, and then a color chart mounted on the LED panel of the white LED unit is inspected for images taken by the camera And

(3) The first door and the head door are all closed, and the cover of the hole of the first door is closed to establish a dark room environment in the chamber.

In addition, in the integrated video camera image inspection apparatus according to the preferred embodiment of the present invention, a fluorescent lamp as a second light source installed in the chamber or a halogen lamp as a third light source is provided. In the first positioning, The camera image inspection can be performed using the halogen lamp.

In the integrated video camera image inspection apparatus according to a preferred embodiment of the present invention, it is preferable that the white LED portion includes a set of four white LEDs having different color temperatures.

According to the present invention as described above, there is an advantage that the image inspection apparatus can function as a reflection type viewer and also as a transmission type viewer. It is a matter of course that the dark room function can be implemented here.

According to the present invention, it is possible to cover all the color temperatures and brightness by using various combinations of white LEDs having different color temperatures at four different color temperatures having electrical characteristics, while excluding the use of RGB LEDs whose set values are changed over time , And realizes an image inspection apparatus capable of more stable inspection.

In addition, another effect of the present invention is that a variety of camera use environments are realized in the chamber of the image inspection apparatus, thereby enabling the image quality test using the actual use environment.

On the other hand, even if the effects are not explicitly mentioned here, the effect described in the following specification, which is expected by the technical features of the present invention, and its potential effects are treated as described in the specification of the present invention.

1 is a diagram showing an example of an electronic configuration of an integrated video camera image inspection apparatus 1 according to an embodiment of the present invention.
2 is a diagram showing an example in which the white LED unit 130 is actually arranged on the LED panel 13 in an embodiment of the present invention.
3 is a view showing an example of the housing configuration of the image inspection apparatus 1 according to an embodiment of the present invention.
Fig. 4 is a diagram showing an example of a main configuration inside and outside of Fig. 3;
5 is a diagram showing an example of the image inspection apparatus 1 in the first positioning of the present invention.
6 is a diagram showing an example of the image inspection apparatus 1 in the second positioning of the present invention.
* The accompanying drawings illustrate examples of the present invention in order to facilitate understanding of the technical idea of the present invention, and thus the scope of the present invention is not limited thereto.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

The image inspection apparatus is used to test the characteristics of the video camera, such as resolution, illumination, color, video level, and the like. In fact, video cameras are used in a variety of environments. When shooting outdoors, the operating environment of the camera varies with time. Camera images need to have optimized performance in environments where the sun's brightness, various color temperature environments, and weather conditions are affected. In addition, since the indoor environment is also various, the video camera should have the image characteristics set in the fluorescent light environment, the halogen light, and the indoor environment where the LED light is illuminated. Therefore, it is necessary to consider various use environments even in the case of the image inspection apparatus. That is, the image inspection apparatus of the present invention is a device capable of inspecting an image by integrating various use environments.

1 schematically shows a main electronic configuration of an image inspection apparatus 1 according to a preferred embodiment of the present invention. The image inspection apparatus 1 may include a white LED unit 130, a fluorescent lamp 140, and a halogen lamp 150 as three types of light source units, and may be selectively used. In addition, it includes input means 120 as a user interface. Through the input means 120, the user can set the environment inside the image inspection apparatus and control the operation of the apparatus.

The image inspection apparatus 1 includes a white LED unit 130 and four types of high-brightness white LEDs 130 having different color temperatures are provided to inspect image characteristics according to the level difference of the color temperature. The color temperature characteristics of the four kinds of high-luminance white LEDs constituting the white LED unit 130 are shown in Table 1 below.

Color temperature characteristics The first white LED 131, 1,800K The second white LED 132, 3,100K The third white LED 133 5,100K The fourth white LED 134, 20,000K

The above four kinds of LED lamps can set all the color temperatures by mixing and superimposing light with different brightness ratio. That is, the four kinds of white LED units 131, 132, 133, and 134 can be selected by operating the LED selection unit 121 of the input unit 120, and by operating the color temperature adjustment unit 125, The ratio of the LEDs of the species can be different. By doing so, the color coordinates can be set differently at the same color temperature. This can be recorded as the most important feature of the present invention. Instead of using RGB LEDs, only the white LED is used to change the color temperature and the brightness of the color coordinates.

FIG. 2 shows how the white LED unit 130 used in the image inspection apparatus 1 of the present invention is actually used. A plurality of white LEDs 130 are mounted on the LED panel 13 in rows and columns. The LED panel 13 is mounted inside the image inspection apparatus 1 and irradiates the LED light into the chamber. Consider the LED panel 13 in the drawing. By arranging four kinds of white LEDs 131, 132, 133, and 134 in a matrix, it is possible to irradiate uniform illumination and desired color temperature into the chamber of the image inspection apparatus 1. The left and right side surfaces of the LED panel 13 may be connected to the control unit 100 through a connector 139.

Let's go back to figure 1 again. The controller 100 controls the operation of the white LED unit 130, the fluorescent lamp 140, and the halogen lamp 150. The input unit 120 includes a plurality of input keys and includes an LED selector 121, a function setting unit 123, and a color temperature controller 125. A power button (not shown) may also be included. When the power button is turned on, the power supply unit 160 supplies driving power to the circuit components.

In addition, the controller 100 controls the operation of the cooling fan 170. The display unit 110 displays the operation state of the image inspection apparatus 1 in real time, and provides information corresponding to the input button.

3 shows an external configuration of the image inspection apparatus 1 according to an embodiment of the present invention. A shape of a rectangular parallelepiped having a substantially rectangular cross section can be applied. The control unit 100, the display unit 110, the input unit 120, the white LED unit 130, the power source unit 160, and the cooling fan 170 are installed in the head door unit 10, Respectively. The LED panel 13 described above is mounted on the head door portion 10. The head door unit 10 performs a controller function of the image inspection apparatus 1 and serves as a second door for opening and closing a chamber which is an internal space of the apparatus. After the second door is opened to mount a color chart in front of the LED panel 13, a camera located inside the camera photographs the color chart and inspects the photographed image. In this embodiment, And functions as a transmission type image inspection apparatus. When the second door is opened, the image inspection apparatus 1 will be laid down in a landscape form (second positioning).

Cooling fans 170a, 170b and 170c are installed on the surface of the head door unit 10, and a connector 175 connected to external equipment can be installed.

In addition, a first door 20 for opening and closing the chamber is provided on the front surface of the image inspection apparatus 1. A plurality of holes (25) may be provided on the surface of the first door (20). The hole 25 is made of a hole and a cover, and the hole communicates with the chamber 30. It is possible to observe the inside of the chamber or to pass the cable connected to the camera located inside the chamber through the hole 25. [ When the first door 20 is opened and used, it can be used as a reflection type projection inspection apparatus.

Fig. 4 shows an example of the plane configuration at the front view of the video image inspection apparatus 1 of Fig. The object to be inspected may be placed in the chamber 30 of the image inspection apparatus 1. [ Four fluorescent lamps 140 may be installed on the four-directional plane of the chamber 30, respectively. In addition, a halogen lamp 150 may be installed at a corner of the chamber 30, respectively. The LED panel 13 to which the four types of white LEDs are arranged can be positioned adjacent to the inner plane of the head door portion 10. [ With such a configuration, the three kinds of light sources can irradiate the light toward the chamber 30. These light sources will be reflected from the inner wall of the chamber 30 in all directions.

The user can selectively press the four buttons 121a, 121b, 121c and 121d constituting the LED selector 121. [ Each corresponds to four high-intensity white LEDs. For example, when the button 121a is pressed, the white LED 131 having a color temperature of 1,800K emits light. Press again to turn off. After selecting the white LED, the color temperature can be set by pressing the up button 125a of the color temperature controller or by operating the down button 125b. The setting state at this time is displayed through the display unit 110. [ By using the four LED selection buttons 121a, 121b, 121c and 121d and the two color temperature control buttons 125a and 125b, it is possible to set all the color temperatures necessary for the image inspection.

The function setting unit 123 may include an automatic button 123a and a menu button 123b. By selecting the automatic button 123a, the image inspection apparatus can be operated in a preset control state. In addition, the menu button 123b may provide various user interfaces such as setting of operation state, storage, option, and fan control. On the other hand, the buttons 180 and 181 can be operated to instruct on / off and illuminance control of the fluorescent lamp 140 and the fluorescent lamp.

As shown in FIG. 4, the first pedestal 190 and the second pedestal 191 may be installed at a phase difference of 90 degrees on the outer housing surface of the image inspection apparatus 1. When the image inspection apparatus 1 stands by the first pedestal 190, the apparatus of the present invention is a reflection type image inspection apparatus. When the image inspection apparatus 1 stands by the second pedestal 191 And functions as a transmission type image inspection apparatus.

≪ Reflective image inspection example &

5 shows an embodiment in which the image inspection apparatus 1 of the present invention is used as a reflection type image inspection apparatus. In this embodiment, the image inspection apparatus 1 selectively illuminates the white LED unit 130, the fluorescent lamp 140, and the halogen lamp 150 mounted on the LED panel 13 to control the optical environment of the chamber 30 The image of the video camera is inspected by creating an environment where the video camera is actually used. After a color chart (not shown) is attached to the inner wall surface of the chamber 30, the color chart can be photographed by a video camera and the image can be inspected.

Use a color chart on the wall to reflect the light on the chart evenly reflected from the front or from the top. For the LED light source, a color chart is placed on the opposite side of the LED panel. When fluorescent and halogen lights are used, a color chart is attached on the opposite side of the lighting position.

In this embodiment, the first door 20 is opened and closed, and the first pedestal 190 supports the bottom of the apparatus. The positional state of the device at this time can be referred to as a first positioning. In this first positioning, the head door portion 10 constitutes the head portion of the apparatus as described above. In the first positioning, three types of light sources are selectively used to perform camera image inspection in reflected light.

≪ Example of transmission type image inspection &

6 shows an embodiment in which the image inspection apparatus 1 of the present invention is used as a transmission image inspection apparatus. The image inspection apparatus 1 in the position of FIG. 5 in the first positioning state is used standing upright and the second pedestal 191 supports the bottom of the apparatus. For convenience, this can be referred to as second positioning. At this time, the head door portion 10 functions as a second door and can be opened and closed. A color chart (not shown) made of glass is mounted in front of the LED panel 13 as an LED light source, and the camera can photograph the color chart and inspect the image. Since the image inspection in this embodiment is performed in a uniform light environment, it is preferable that the fluorescent lamp 140 and the halogen lamp 150 are turned off and only the light source of the white LED unit 130 is illuminated.

The chart size used for the transmissive light source of this embodiment may be an effective size of 180 * 240 mm and an outer size of 290 * 320 mm. The transmissive chart in this case corresponds to a 4: 3 analog TV ratio. In addition, a transmission chart of a 16: 9 standard having an effective size of 153 * 272 mm and an outer size of 200 * 310 mm can be used. The transmissive chart in this case corresponds to the digital HDTV ratio.

Of course, although not shown in the drawings, a cradle for detaching the color chart will be installed on the inner wall of the chamber adjacent to the LED light source. In the present embodiment, the white balance may be inspected when inspecting an image without a chart.

≪ Example of dark room &

The image inspection apparatus 1 of the present invention can provide a darkroom environment. External light can be prevented from entering into the chamber 30 by closing both the first door 20 and the head door portion 10 and sealing the cover of the hole 25 of the first door 20. [ The chamber 30 functions as a dark room. It is also possible to position the camera in the chamber 30 and draw out a cable connected with the camera through the hole 25 of the head door portion 10 (this is a preferred embodiment in which the apparatus of the present invention is used as a reflective viewer or a transmissive viewer .

Although the main configuration has been described in the above description, various known means may be added to the description. For example, an inverter circuit for controlling the brightness of a fluorescent lamp and a halogen lamp, a constant current control means for controlling a flicker phenomenon of a fluorescent lamp or a halogen lamp, a means for sensing and automatically controlling the temperature, Software may be used to control the light required to use the device. That is, the components not described in the present specification are disclosed by using known techniques or by applying or improving such known techniques as needed. In addition, various fastening means which are not clearly shown in the drawings, numeric / letter indicators for helping the user to set the functions, dimensions of the apparatus are obviously structured, or they are variously changed according to the manufacturing / And thus is omitted in the present specification.

The scope of protection of the present invention is not limited to the description and the expression of the embodiments explicitly described in the foregoing. It is again to be understood that the scope of protection of the present invention can not be limited by obvious alterations or permutations of the present invention.

Claims (3)

1. An image inspection apparatus having a chamber for inspecting an image of a camera therein, the apparatus comprising:
A first door that opens and closes the chamber in a first positioning and has a hole formed on a surface thereof, the hole having at least one cover communicating with an inner space of the chamber;
And a second position in a second position having a phase difference of 90 degrees from the first position, wherein the first positioning constitutes a head part of the image inspection apparatus, and the functions of the control unit and the apparatus for controlling the functions of the apparatus A head door portion provided with a user interface for selecting and setting; And
A first light source provided adjacent to the head door and irradiating light to the chamber, wherein a plurality of white LEDs having different color temperatures and adjustable by the color temperature controller are arranged in a matrix on the LED panel And a white LED part installed,
(1) In the first positioning, a color chart attached to the inner wall of the chamber is inspected for an image taken by the camera under the environment of the reflected light source of the first light source,
(2) In the second positioning, the head door unit is opened and closed, the image inspection apparatus is rotated to a 90-degree rotation position, and then a color chart mounted on the LED panel of the white LED unit is inspected for images taken by the camera And
(3) closing the first door and the head door portion, and closing the cover of the hole of the first door, thereby establishing a dark room environment in the chamber. The method according to claim 1,
Characterized in that a fluorescent lamp as a second light source provided in the chamber or a halogen lamp as a third light source is used and the camera image inspection is performed using the fluorescent lamp or the halogen lamp in the first positioning, Image inspection device. The method according to claim 1,
Wherein the white LED portion is constituted by one set of four white LEDs having different color temperatures.

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