| 摘要 |
PURPOSE: A method and apparatus is provided to perform radioactive decontamination in a short time by accurately measuring position of radiation source and radiation dosage through the use of a plurality of CCD cameras attached to a remote control robot. CONSTITUTION: A method comprises a step of shielding the light incident to two cameras arranged in a horizontal direction; a step of obtaining a CCD camera image through an image processing unit; a step of calculating brightness of the obtained image, through the image processing unit; a step of searching the horizontal position of the radiation source by moving the CCD cameras in a horizontal direction in accordance with the change of the calculated brightness value and brightness ratio; a step of photographing the horizontal position of the radiation source in an actual image, by changing the angle of one of the two cameras; a step of displaying the actual image onto a monitor, and indicating the horizontal position of the radiation source by the image processing unit and image analysis unit; a step of returning the two cameras to their original positions, and rotating the cameras at the angle of 90 degree in a vertical direction; a step of obtaining images of the two cameras through the image processing unit; a step of calculating brightness of the obtained image, through the image processing unit; a step of searching the vertical position of the radiation source by moving the CCD cameras in a vertical direction in accordance with the change of the calculated brightness value and brightness ratio; a step of photographing the vertical position of the radiation source in an actual image, by changing the angle of one of the two cameras; a step of displaying the actual image onto a monitor, and indicating the vertical position of the radiation source by the image processing unit and image analysis unit; a step of calculating radiation dosage by the image analysis unit, by comparing the brightness value at the site where the vertical/horizontal position of the radiation source is indicated, with the brightness value which is preset in accordance with the change of radiation dosage; and a step of displaying the calculated radiation dosage onto a monitor.
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