JP2009039337A - Image inspection device and image inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image inspection device capable of efficiently inspecting the light-emission state of an object to be inspected including light emitters disposed in a game machine with various layouts and various decoration. <P>SOLUTION: Based on an inspection command input from a keyboard 11 or a mouse 12, a computer device 5 determines the object as: a non-defective product if the average illuminance calculated by an inspection part of an illumination device 2 is in the illuminance range defined by the preset upper and lower limits of illuminance values; and a defective product if the average illuminance is out of the illuminance range. Then, the computer device 5 displays the result of determination in a display device 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image inspection apparatus and an image inspection method for inspecting luminance from a light emission image of an object to be inspected including a light emitting body used in a gaming machine and determining pass / fail.

  A gaming machine such as a pachinko machine or a slot machine is provided with an electric decoration device as means for enhancing the decoration effect. The decoration device is often provided on the front frame of the gaming machine, and the decoration effect and the production effect are enhanced by changing the light emission mode such as the direction of light emitted from the light emitting means and the flashing, thereby enhancing the player's interest. Ingenuity has been devised.

  The lighting device is provided with a large number of LEDs as a light source, and the emission color of the LEDs is also adjusted to a single color such as the three primary colors of red (R), green (G), and blue (B) or the three primary colors of these lights. There are various colors such as magenta (M), yellow (Y), cyan (C), and white (W). Moreover, each LED is covered with a resin cover having translucency, or has been devised to give a decoration effect by diffusing or condensing with a lens.

As a method of inspecting whether or not the illumination device emits light as expected, the light emission state is visually inspected by energization, or each LED as a light source is energized and the light emission state is imaged with a CCD camera. Whether the image processing unit detects RGB data and the electrical characteristic test data (input voltage, output current, blinking cycle, etc.) and luminance data stored in advance in a non-volatile memory or the like satisfy the intended conditions And pass / fail judgment is performed (see Patent Documents 1 and 2).
JP-A-9-167863 Japanese Patent Application Laid-Open No. 11-201868

An LED as a light emitter has a characteristic that luminance easily varies even with the same input voltage and energization current due to variations in light emission efficiency and light absorption rate at the manufacturing stage. In particular, white color created by dimming the three primary colors (RGB) of light tends to cause uneven color. LEDs having such characteristics are provided in gaming machines in various layouts, from tens to hundreds, in order to enhance the decoration effect and to inform the player of the gaming state.
Furthermore, it often becomes defective due to various factors such as mounting mistakes such as mounting LEDs of different colors that can occur at the time of LED board mounting, non-lighting due to defective LED or board, damage due to mistakes when assembling the resin cover, etc. Inspecting each assembly process takes time, and there is a problem that efficiency is poor.
Therefore, not only abnormalities of the light emitters provided in a lot of gaming machines, but also inspection of the light emission state of the inspected object including resin covers, lens dirt, scratches, etc. is efficient according to the various layouts and exterior specifications of the light emitters. There is a need to do well.

  An object of the present invention is to provide an image inspection apparatus and an image inspection method capable of efficiently inspecting the light emission state of an object to be inspected including a plurality of light emitters provided in a gaming machine with various layouts and various decorations.

In order to achieve the above object, the present invention comprises the following arrangement.
An image inspection apparatus for performing pass / fail judgment by inspecting luminance from a light emission image of an object to be inspected including a light emitting body used in a gaming machine, and an inspection unit that emits light from the object to be inspected placed at an inspection position, and an input Image pickup means for picking up a light emission image of the object to be inspected in response to a command from the unit, and each luminance data of RGB included in the inspection unit designated in the inspection line or inspection area from the input unit in advance among the captured light emission images The average illuminance value is calculated and compared with the illuminance setting value of the corresponding inspection section of the non-defective inspected object stored in advance, the control means for determining pass / fail, and the captured image of the inspected object and the inspection result are displayed. The control means is provided with an upper limit value and a lower limit value of the preset illuminance set value, wherein the average illuminance value calculated by the inspecting part of the object to be inspected according to the inspection command input from the input part is defined. Within the illuminance range Good when Murrell, and characterized in that the screen displayed on the display means the determination result is determined as defective when that is the outside illuminance range.

  An image inspection method for performing pass / fail judgment by inspecting luminance from a light-emitting image of an object to be inspected including a light-emitting body used in a gaming machine, wherein a non-defective inspected object placed at an inspection position is caused to emit light, and an input unit In response to a command from the imaging unit, the imaging unit captures a luminescent image and displays it on the display unit, and in the luminescent image of the inspected object displayed on the screen, the inspection unit is specified by being surrounded by an inspection line or an inspection area from the input unit The control means calculates the illuminance setting value from each luminance data of RGB included in the inspection line or inspection area specified in accordance with the command from the input unit, and the upper limit value and the lower limit value input from the input unit A step of storing in the control means together with the value, a step of capturing a light emission image of the object to be inspected placed at the inspection position in accordance with an imaging command from the input unit, and an input unit In accordance with the inspection command, the control means calculates the average illuminance value of each component of RGB from the luminance data in the inspection line or inspection area designated, and is defined by the upper limit value and lower limit value of the illuminance setting value stored in advance. It is characterized in that it includes a step of determining pass / fail according to whether it is included in the illuminance range and displaying the inspection result on the display means on the screen.

Further, the method includes a step of setting a time from when a non-defective inspected object is turned on until an image is captured, and a step of setting an illuminance threshold value that allows the inspection image to be captured.
Further, the method includes a step of setting a position in the XY direction of the specific portion from the captured image of the non-defective object to be inspected, and correcting the image position from the captured image of the corresponding part of the object to be inspected.
Further, the method includes a step of displaying an error message on the display means when the illuminance value measured by taking an image around a non-defective object exceeds a set threshold value.
Further, the method includes a step of storing the inspection image, the inspection result, and the comprehensive determination result as saved data in the control unit.

By using the above-described image inspection apparatus and image inspection method, a non-defective inspected object is caused to emit light, and the illuminating image is captured by the imaging unit and displayed on the display unit, and is surrounded by the inspection line or the inspection area from the input unit. Since the inspection part can be designated, the inspection range can be arbitrarily designated according to the layout of the light emitter and the decoration mode.
In addition, the imaging means captures the light emission image of the object to be inspected, and the average illuminance value of each component of RGB is calculated from the luminance data in the inspection line or inspection area designated by the control means according to the inspection command from the input unit. Since it is judged whether it is within the illuminance range defined by the upper limit value and the lower limit value of the illuminance setting value stored in advance and whether the inspection result is displayed on the display means, a large number of game machines are provided. It is possible to perform not only abnormalities in the luminous state of the illuminant but also visual inspections including resin covers and dirt and scratches on the lens, and efficiently perform inspections according to various layouts of the illuminant and exterior specifications. Can do.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
A schematic configuration of the image inspection apparatus according to the present embodiment will be described with reference to FIG. In the following, an image inspection apparatus that performs pass / fail determination by inspecting the luminance of a light emitting body (LED) used for a gaming machine will be described.

  The inspection object fixing jig 1 positions and fixes the electrical decoration device 2 that becomes an inspection object. The illumination device 2 has a light-emitting substrate on which a large number of LEDs are provided as a light source, and a light-transmitting transparent resin cover (for example, a polycarbonate resin material, an ABS resin material, an acrylic resin material, etc.), a resin lens (condensing type, diffusion) Type). The inspection device (inspection means) 3 energizes the electrical decoration device 2 fixed at the inspection position to emit light in the same manner as in the gaming state.

  Above the inspection object fixing jig 1, a CCD camera device 4 using a photoelectric conversion element as an imaging means is provided. One CCD camera device 4 or a plurality of CCD camera devices 4 may be provided. The CCD camera device 4 captures a light emission image including an inspection unit designated in advance on an inspection line or an inspection area of the illumination device 2 that has emitted light in response to an imaging command. The CCD camera device 4 may be fixed at the center of the imaging position so that the entire light emitting surface falls within the viewing angle, or provided so as to be movable in the XY direction, and the inspection is performed by changing the imaging position. You may come to perform.

  The CCD camera device 4 is connected to a computer device 5 (control means). A display device 6 (display means) is connected to the computer device 5.

The computer device 5 is provided with a control board 8 including a CPU for controlling the operation of the image inspection apparatus , an image processing board 10 and the like. Various application software such as an OS (operating system) for operating the computer device 5, an image inspection processing program, and a spreadsheet program are installed on the control board 8. The control board 8, and the execution unit that is not shown calculates the average luminance value from the luminance data obtained by the image analysis, such as the storage unit is provided for storing the calculation results and the threshold, a keyboard 11 and a mouse Input data (numerical value, command, inspection line, inspection area, etc.) is input from 12 or the like (input unit). The image processing board 10 is installed with known image processing application software for analyzing RGB luminance data from color image data captured from the CCD camera device 4.

  The computer device 5 calculates the average illuminance value from the RGB luminance data included in the designated inspection part of the object to be inspected, and compares it with the corresponding illuminance setting value of the non-defective inspected object to determine pass / fail. The inspection image and the inspection result are output and displayed on the display device 6. Specifically, the computer device 5 is non-defective when the average illuminance value calculated by the inspection unit of the object to be inspected is included in the illuminance range defined by the preset upper and lower illuminance setting values. When it is out of the illuminance range, it is determined as a defective product and the determination result is displayed on the screen of the display device 6.

  Further, the inspection device 3 causes the illumination device 2 to emit light, and the computer device 5 has a luminance exceeding the threshold value of a predetermined specific portion of an image input by the CCD camera device 4 that the illumination device 2 has emitted light. Detect by change. The control board 8 controls the timing at which the CCD camera device 4 captures a light emission image after the illumination device 2 emits light. This is because the light source (LED) of the illumination device 2 is inspected in a stable light emission state.

Here, an example of the image inspection method will be described with reference to the screen diagrams of FIGS. 3 to 8 based on the block diagram of FIG. 1 and the flowchart of FIG. FIGS. 3 to 6 are setting screen diagrams for setting a reference value for image inspection by capturing a light emission image of the non-defective electrical decoration device 2, and FIGS. 7 and 8 are screen diagrams during and after the image inspection.
First, in FIG. 1, an illumination device 2 that is an object to be inspected is fixed to an inspection object fixing jig 1. And it supplies with electricity to the electrical decoration apparatus 2 made into a non-defective product, and makes the test | inspection apparatus 3 light-emit. The computer device 5 captures the light emission image from the CCD camera device 4 at 1 frame / second (step S1 in FIG. 2; see the screen diagram in FIG. 3). At this time, a setting is made so that a light emission image is captured from the CCD camera device 4 after a set time has elapsed (for example, after 1 second to 1 hour has elapsed) after the lighting of the illumination device 2 is detected.

  In addition, it is possible to set an illuminance threshold value for detecting lighting of the object to be inspected (lighting device 2). When the illumination device 2 is turned on and the change in illuminance on the background screen (● mark in FIG. 3) exceeds the set threshold, the computer device 5 detects the lighting and emits light after the set time counted by the timer has elapsed. An image is picked up by the CCD camera device 4. It is possible to set the time from when the non-defective electrical decoration device 2 is turned on until the emission image is captured, and to set the illuminance threshold value that permits the start of the inspection image capture.

  Next, in FIG. 2, various initial values are set by the computer device 5 (see FIG. 1) (step S2). Specifically, two positions in the XY direction of the specific part are set from the light emission image G of the non-defective electrical decoration device 2 (see FIG. 1) (see FIG. 3; P1 and P2), The capture position is automatically corrected from the corresponding light emission image G of the decoration device 2. Further, in FIG. 4, when the luminescent image G of the non-defective electrical decoration device 2 (see FIG. 1) is captured, the ambient illuminance value (see the mark ■ in FIG. 3) is detected to set a threshold value. As a result, an error message is displayed when the ambient illuminance value (refer to the mark ■ in FIG. 3) corresponding to the capture of the light emission image G of the object to be inspected (the decoration device 2) after the inspection starts exceeds the set threshold value. Is displayed. This is to prevent the contrast from changing depending on the use environment and the detection accuracy of the illuminance value of the electrical decoration device 2 (see FIG. 1) from changing.

  Next, in FIG. 3, the inspection part of the luminescent image G is specified by an inspection line (line) or an inspection area (surface). That is, in FIG. 1, the inspection part of the luminescent image G displayed on the screen of the display device 6 is drawn from the input part (keyboard 11, mouse 12, etc.) from the inspection line L (for example, FIG. 3; inspection lines L1 to L7). An inspection area E (for example, FIG. 3; inspection areas E1 and E2) is enclosed and designated. This inspection unit can be designated at an arbitrary layout at a plurality of locations while looking at the display screen.

  At this time, the computer device 5 (see FIG. 1) determines the average illuminance value (illuminance) from the RGB luminance data of the designated inspection line L or inspection area E in both the line setting of FIG. 5 and the surface setting of FIG. Set value) is calculated and stored in the computer device 5 together with the upper limit value and the lower limit value input and set from the input unit (keyboard 11, mouse 12, etc.). An RGB average illuminance value is calculated in a similar manner from luminance data detected from an object to be described later, and an error message is displayed on the screen when a set threshold value is exceeded. 4 to 6, density values of RGB luminance data extracted from the color image data by the image processing program are displayed in a histogram (256 gradations from 0 to 255).

More specifically, the luminance value (average illuminance value) Y for each inspection line L or inspection area E is calculated using the luminance values (brightness and brightness) of R, G, and B, where Y = 0.229R + 0.587G + 0. It is calculated at 114B (256 gradations).
An upper limit value YU and a lower limit value YD are set for the luminance value Y. If the inspection value Y1 is within the range of YD <Y1 <YU, the inspection result is determined to be OK, and if the inspection value is out of the range, the inspection result is determined to be NG. It is like that. For example, assuming that R = 10, G = 20, B = 150 at the time of setting, R = 50, G = 20, B = 130 at the time of inspection, and the upper and lower threshold values are ± 10,
Luminance value Y at the time of setting; Y = 0.229R + 0.587G + 0.114B
= 0.229 × 10 + 0.587 × 20 + 0.114 × 150
= 21.87
Luminance value Y1 at the time of inspection; Y1 = 0.229R + 0.587G + 0.114B
= 0.229 x 50 + 0.587 x 20 + 0.114 x 130
= 41.54
Upper limit value YU in the set luminance value; YU = Y + 10
= 21.87 + 10
= 31.87
Lower limit value YD in set luminance value; YD = Y−10
= 21.87-10
= 11.87
Since this result is Y1 (41.54)> YU (upper limit value: 31.87), the inspection result is determined to be NG.

  Next, in the flowchart of FIG. 2, the inspection of the object to be inspected (lighting device 2) is started (step S3). For example, when an inspection icon is selected from a toolbar (not shown), an inspection screen shown in FIG. 7 is displayed. Three types of setting images, inspection captured images, and inspection images are displayed on the inspection screen. In FIG. 7, only the non-defective setting image is displayed during the inspection. For example, when an image capture key on a toolbar (not shown) is selected from the keyboard 11 or the mouse 12 in FIG. 1, the inspection device 3 emits light to be inspected (lighting device 2), and the light emission image G is captured by the CCD camera device 4. The captured emission image G is displayed as an inspection captured image in the center of FIG.

  Next, when the inspection icon K in FIG. 7 is clicked, the inspection captured image is inspected. That is, the average illuminance of each component of RGB is calculated from the luminance data in the inspection line (FIG. 7 setting screen; L1 to L7) or inspection area (FIG. 7 setting screen; E1, E2) designated in advance and stored in advance. A pass / fail judgment is made in comparison with the illuminance set value at the same position of the non-defective product (lighting device 2).

  The inspection result is shown in FIG. In FIG. 8, in addition to the set image and the inspection captured image, the comprehensive determination result (good / impossible) including the inspection image and the quality determination according to the inspection line L and the inspection area E is displayed in a table format. 8 is stored in the memory of the computer device 5 (see FIG. 1) as saved data (step S4).

  Then, it is determined whether or not the inspection is completed in FIG. 2 (step S5), and if there is an object to be inspected (electric decoration device 2), the process returns to step S3 and the same operation is repeated to repeat the inspection. If there is no inspection object (lighting device 2), the process ends.

As described above, the non-defective illumination device 2 is caused to emit light, and the light emission image G is picked up by the CCD camera device 4 and displayed on the display device 6 and is inspected by enclosing the inspection line or inspection area from the keyboard 11 and mouse 12. Since the part can be specified, the inspection range can be arbitrarily specified according to the layout of the light emitter and the decoration mode.
In addition, the CCD camera device 4 captures the light emission image G of the object to be inspected (the illumination device 2), and the computer device 5 is designated in the inspection line or inspection area designated by the keyboard 11 or the mouse 12 in response to the inspection command. The average illuminance value of each component of RGB is calculated from the luminance data, and it is judged whether it is within the illuminance range defined by the upper limit value and lower limit value of the illuminance setting value stored in advance, and the inspection result is displayed. Since the screen is displayed on the means, not only abnormalities in the light emission state of the light emitters provided in a lot of gaming machines, but also visual inspections including resin covers, lens dirt and scratches can be performed together. Inspections according to layout and exterior specifications can be performed efficiently.

  In the present invention, the inspection of the illumination device of the pachinko gaming machine has been described as an example of the gaming machine, but it can also be applied to the inspection of inspected objects including many light emitters of other gaming machines such as a slot machine. .

It is a block block diagram of an image inspection apparatus. It is a flowchart of an image inspection method. It is explanatory drawing of the initial value setting image data of a good product. It is an initial value setting screen figure. It is an initial value setting screen figure. It is an initial value setting screen figure. It is a screen figure during inspection image taking-in. It is a screen figure which shows a test result.

Explanation of symbols

1 Inspection object fixing jig
2 lighting equipment
3 Inspection equipment
4 CCD camera device
5 Computer equipment
6 Display device
8 Control board
10 Image processing board
11 Keyboard
12 Mouse L Inspection line E Inspection area G Luminous image K Inspection icon

Claims (6)

An image inspection apparatus for performing pass / fail determination by inspecting luminance from a light emission image of an object to be inspected including a light emitter used in a gaming machine,
Inspection means for emitting light to be inspected placed at the inspection position;
Imaging means for capturing a light emission image of the object to be inspected according to a command from the input unit;
The average illuminance value of each luminance data of RGB included in the inspection unit designated in the inspection line or the inspection area from the input unit in the captured light emission image is calculated in advance, and the corresponding inspection of the non-defective inspected object stored in advance is calculated. Control means for making a pass / fail judgment in comparison with the illuminance setting value of the part;
Provided with display means for displaying the image of the object to be inspected and the inspection result,
The control means has an average illuminance value calculated by the inspection unit of the object to be inspected according to the inspection command input from the input unit within an illuminance range defined by an upper limit value and a lower limit value of the preset illuminance setting value. An image inspection apparatus that, when included, is determined to be a non-defective product and when it is out of the illuminance range, is determined to be a defective product and the determination result is displayed on the display means. An image inspection method for inspecting luminance from a light emission image of an object to be inspected including a light emitter used in a gaming machine, and performing pass / fail judgment,
A step of causing a non-defective inspected object placed at the inspection position to emit light, imaging an emission image in accordance with a command from the input unit, and displaying the image on a display unit;
Specifying the inspection part by enclosing the inspection line or inspection area from the input part in the light emission image of the inspection object displayed on the screen;
The control means calculates the illuminance set value from the RGB luminance data included in the inspection line or inspection area designated in accordance with the command from the input unit, and the control means together with the upper limit value and the lower limit value input and set from the input unit Memorizing steps,
Capturing a light-emitting image of an object to be inspected placed at an inspection position in accordance with an imaging command from the input unit with an imaging unit;
The average illuminance value of each component of RGB is calculated from the luminance data in the inspection line or inspection area designated by the control means in accordance with the inspection command from the input unit, and the upper limit value and lower limit value of the illuminance setting value stored in advance An image inspection method including a step of performing pass / fail determination based on whether or not the light is included within a specified illuminance range and displaying the inspection result on a display unit.   3. The image inspection method according to claim 2, comprising a step of setting a time from when a non-defective inspection object is turned on until an image is captured, and a step of setting an illuminance threshold value that allows the start of capturing the inspection image.   The image inspection method according to claim 2, further comprising the steps of: setting a position in the XY direction of the specific portion from a captured image of a non-defective object and correcting the image position from the captured image of a corresponding part of the object.   3. The image inspection method according to claim 2, further comprising the step of displaying an error message on the display means when the illuminance value measured by taking an image around a non-defective object exceeds a set threshold value.   The image inspection method according to claim 2, further comprising a step of storing the inspection image, the inspection result, and the comprehensive determination result as saved data in the control means.