JP2003130993A - Method and device for photographing lid surface of glossy drum without reflection image of illumination source - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a method and a device capable of obtaining images with a color video camera without reflection image of light source, which was conventionally impossible, and automatically recording images with a simple and space saving mechanism. SOLUTION: When the lid surface of a glossy drum is photographed for a purpose of inspection and the like, the drum is put on a rotational device. For obtaining images without the reflection image of the light source for drum lid illumination, a plurality of illuminations placed in various angle positions above the lid are turned on in turn, a part with the reflection image of each light source is discarded and the other part than the discarded part is synthesized to obtain a complete lid surface image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for inspecting the appearance of drums (hereinafter simply referred to as "drums") for storing radioactive waste. More specifically,
The present invention, when taking a photograph of the lid surface of a glossy drum for the purpose of inspection or the like, when a light source as an illumination is reflected, the portion is not the original image and is taken to prevent the inspection from being impossible. It relates to a method and an apparatus for implementing the method.

[0002]

2. Description of the Related Art The inventors of the present application have previously disclosed in Japanese Patent Laid-Open No. 2000-310698 (hereinafter referred to as prior invention) "a method and an apparatus for inspecting the appearance of a drum can for storing radioactive waste by a digital line camera". Before this invention,
Although it was a method of photographing the surface of the drum can with a video camera or a still camera, (1) it was not possible to continuously and simultaneously inspect and record the entire surface of the drum, and (2) screen data was divided into multiple angles. As a result, there is a break in the data of the inspection site, data retrieval by computer and image analysis become complicated, and (3) In the case of visual inspection, there is a risk of exposure to the human body due to radioactive waste in the drum can. (4) In addition, there is a problem that the test result varies among individuals.

The prior invention will be briefly described with reference to FIGS. 3 and 4. In FIG. 3, reference numeral 21 denotes a rotating device such as a turntable. A drum can A is placed on the rotating device 21, is rotated, and an illumination 23 having a slit 23a from the side is provided.
In the state where the drum can A is irradiated with, the side camera surface of the drum can is continuously photographed by the line camera 22. The line camera 22 reads the rotation angle of the rotating device 21, and sequentially transfers the image data scanned in the vertical direction to the computer 24.

The transferred image data is stored in the computer 24.
Adjust to a continuous development view of the side of drum can A and save as a digital camera. Moreover, the upper and lower surfaces of the drum A are
The images are taken by the upper camera 27 and the bottom camera 28, and are similarly stored as digital data. The stored image data is displayed on the computer monitor 25 or the printer 26.
It is output to and used as a material for visual inspection.

Now, in the case of inspecting the upper and lower surfaces of a drum with such a device, a lighting device for image inspection is conventionally several cm.
Mainly aimed at small things, and since the light source is also aimed at black and white analog video cameras, the light amount was insufficient as a light source for color video cameras. The lid surface of the drum can has a direct length of 60 cm or more, and the conventional illumination device for image inspection cannot be used as it is in terms of size, and it is impossible to actually apply it in terms of optical design. near. Also, to use a high resolution color video camera for visual inspection,
A conventional light source for a black-and-white video camera lacks the amount of light, but it is technically difficult because there is no light bulb suitable for obtaining uniform light with a light source having higher brightness.

For color high-resolution photography, a photographic illumination device using a strobe is generally used. However, a large-scale device is required, and in order to use the light source using these strobes, it is often necessary to have a skill with technical experience, and it cannot be a simple automatic device.

In this way, the paint on the lid surface of the drum can is removed, scratches,
Proper lighting is indispensable in order to accurately record the state of rust etc. with a photograph. However, when the lid surface of the drum can is glossy, the light source is reflected, and that part is not the original image, so it will not be an accurate inspection record,
Further, inspection based on the image becomes impossible.

[0008]

DISCLOSURE OF THE INVENTION The present invention is an improvement of the above-mentioned prior invention to obtain an image without reflection of a light source in a color video camera, which has been impossible in the past, and a simple and space-saving mechanism. It is an object of the present invention to realize a method and an apparatus capable of automatically recording an image with.

[0009]

[Means for Solving the Problems] (1) When photographing the lid surface of a glossy drum can for the purpose of inspection or the like, the drum can is placed on a rotating device and a light source for illuminating the lid surface of the drum can appears. In order to obtain a video that is not included, a plurality of lights installed at different angle positions above the lid surface are alternately turned on, and the part where each light source is reflected is partially discarded, except for the part that is partially discarded. By synthesizing the parts of, the complete lid surface image can be obtained. (2) A pair of first strobe lights for illuminating the lid surface of the drum can, which is above the rotatable glossy drum can as a device that is mounted on a rotating device to obtain an image of the complete lid surface, and A second strobe lighting, a first lighting power supply connected to the first strobe lighting, a second lighting power supply connected to the second strobe lighting, a first strobe lighting and a second strobe lighting It is composed of a color video camera installed at an intermediate position of the strobe lighting for photographing the upper lid surface, and a video camera control device connected to the color video camera. Images from two directions, which were obtained when the light was turned on, were sent to the control computer via the computer interface and recorded for visual inspection on the computer display. Then, (3) a glossy drum can was placed on a rotating device, and the upper surface and the lower surface of the drum can were installed in the photographing device described in (2) above, respectively, and the upper lid surface and the bottom surface of the drum can were inspected at the same time.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a conceptual diagram of an upper lid surface photographing device for a drum 1 according to the present invention. The upper lid surface of the drum 1 is photographed by the color video camera 2 and the video camera control device 5 connected to the color video camera 2, the first strobe lighting 3 and the first strobe lighting power source 6, and the second strobe lighting 4. And a second power source 7 for strobe illumination, a control computer 9 and a computer interface 8 that automatically perform shooting and image composition, and a computer display 10 for displaying an image.

The first strobe light 3, the second strobe light 4, and the color video camera 2 are fixed at a photographing position above the drum can 1 for photographing the upper lid surface of the drum can 1 and are stable in a uniform state. It is adjusted so that the image can be taken.

In order to automatically obtain images, the color video camera 2 and the first strobe light 3 and the second strobe light 4 are connected to a programmed control computer 9 via a computer interface 8. .

The present invention has the above-mentioned configuration, the first strobe illumination 3 is turned on, the first image 11 of FIG. 2 is photographed, and this is recorded in the control computer 9. Next, the second strobe illumination 4 is turned on to photograph the second image 12, which is recorded in the control computer 9. Then, the first image 11 and the second image 12 are divided into the divided image 1 of the first image 11.
3, the divided image 14 of the first image 11, the divided image 15 of the second image 12, and the divided image 16 of the second image 12, respectively. Then, the divided image 13 of the first image and the divided image 16 of the second image in which the light source is reflected are discarded, and the divided image 14 of the first image and the divided image 15 of the second image in which the light source is not reflected are combined. By doing so, it is possible to obtain a complete composite image 17 of the upper lid surface without reflection of the light source.

(Photographing method) 1. The drum can 1 is installed at the photographing position so that the lid surface of the drum can 1 can be photographed. 2. The program of the control computer 9 activates the first illumination power source 6 to turn on the second strobe illumination 4 and obtain the first image 11 of the color video camera 2. This first image 11 is recorded in the control computer 9 via the computer interface 8. 3. The program of the control computer 9 activates the second illumination power source 7 to turn on the second strobe illumination 4 and obtain the second image 12 of the color video camera 2. This image is recorded in the control computer 9 via the computer interface 8. 4. The program of the control computer 9 divides the first image 11 into divided images 13 and 14. Similarly, the second image 12 is divided into the divided image 15 of the second image and the divided image 16 as well. 5. The divided image 13 and the divided image 16 in which the light source of the divided image is reflected are discarded, and the partial divided image 14 and the divided image 15 in which the light source is not reflected are combined to obtain a combined image 17. In the above, there are two lightings, the first and the second,
It is possible to apply even in the case of more than one.

The method of photographing the upper lid surface of the drum can has been described above. However, if a similar device is installed below the bottom lid surface shown in the schematic diagram of the prior invention of FIG. 4, the bottom lid surface can be photographed at the same time.

[0016]

By utilizing the present invention for photographing the upper and lower lid surfaces of a drum can, the recording of the surface condition of the drum can, which was impossible with the prior art, is prevented from being reflected by the illumination light source in the color video camera. High-precision images can be recorded automatically with a simple and space-saving mechanism. By applying the present invention not only to the lid surface of the drum can but also to an apparatus for actually photographing the surface of the drum can as shown in FIG. 4, the recording of the state of the outer surface of the drum can is automatically performed over the side surface and the lid surface of the drum can. By doing so, it has become possible to organize images by recording images on a computer over the entire surface. As a result, the time taken to record the surface condition of the drum can is reduced, and stable images and records can be easily recorded.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a drum can photographing device.

FIG. 2 is a schematic view of the operation of the drum can photographing device.

FIG. 3 is a conceptual diagram of an appearance inspection device according to the prior invention.

FIG. 4 is a schematic diagram of a drum can appearance inspection device according to a prior invention.

[Explanation of symbols]

1 Drum Can 2 Color Video Camera 3 First Strobe Lighting 4 Second Strobe Lighting 5 Video Camera Control Device 6 Power Supply for First Strobe Lighting 7 Power Supply for Second Strobe Lighting 8 Computer Interface 9 Control Computer 10 Computer display 11 First image 12 Second image 13 First image segmented image 14 First image segmented image 15 Second image segmented image 16 Second image segmented image 17 Composite image

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G21F 5/12 G21F 9/36 511Z 9/36 511 H04N 5/225 C H04N 5/225 G21F 5/00 E

Claims (3)

[Claims] 1. When photographing the lid surface of a glossy drum can for the purpose of inspection or the like, in order to obtain an image in which the light source for illuminating the lid surface of the drum can is not reflected by placing the drum can on a rotating device, By alternately turning on a plurality of lights installed at different angular positions above the lid surface, partially discarding the parts in which the respective light sources are reflected, and combining the parts other than the partially discarded parts , A method of taking a photograph of the lid surface of a glossy drum without reflecting the light source for illumination, which is characterized in that a complete lid image is obtained. 2. A pair of a first strobe illumination and a second strobe illumination, which are above a glossy drum can that is placed on a rotating device and can rotate, and illuminates a lid surface of the drum can; A first illumination power source connected to the first strobe illumination, a second illumination power source connected to the second strobe illumination, and an intermediate position between the first strobe illumination and the second strobe illumination. And a video camera control device connected to the color video camera, the two directions obtained by turning on the first strobe lighting and turning on the second strobe lighting. The image from is sent to the control computer via the computer interface and recorded, and the visual inspection can be performed on the computer display. A device that shoots without reflecting the source. 3. A glossy drum can is placed on a rotating device, and the upper surface and the lower surface of the drum can are installed on the photographing device according to claim 2, and the upper lid surface and the bottom surface of the drum can can be inspected at the same time. A device that takes a picture of the lid surface of a glossy drum without reflecting the light source for illumination.