JP2006038532A5 - - Google Patents

Claims (4)

When obtaining an X-ray fluoroscopic image of an inspection object having features in the outer shape and the internal structure, and determining the type of the inspection object from the characteristic amount of the inspection object obtained from the X-ray fluoroscopic image,
After removing the image component of the easily damaged part portion in the inspection object from the X-ray fluoroscopic image, determine a threshold value for detecting the characteristic part of the inspection object according to the luminance histogram of the X-ray fluoroscopic image; An object identification method comprising: detecting a feature amount of the inspection object from an image component extracted from the X-ray fluoroscopic image based on the threshold value, and determining a type of the inspection object. The object to be inspected is a shell that has been left in the ground, and the image component removed from the X-ray fluoroscopic image is an image portion corresponding to a part of the shell, such as a cartridge case, a warhead plug, and a tail wing. ,
The threshold is set based on a luminance level at which the luminance histogram of the X-ray fluoroscopic image reaches a peak, and is used for extracting the image area of the shell from the X-ray fluoroscopic image,
The object identifying method according to claim 1, wherein the feature amount is obtained as a maximum bullet diameter, a presence / absence of a glaze cylinder, a length of a transfer cylinder, and the like shown in an image area of the bullet. An X-ray fluoroscopic apparatus that obtains an X-ray fluoroscopic image of an inspection object having features in an outer shape and an internal structure, and an image processing apparatus that performs image processing on the X-ray fluoroscopic image and determines the type of the inspection object. And
The image processing apparatus includes: a first image processing unit that removes an image component of a component part that is easily damaged in the inspection object from the X-ray fluoroscopic image;
A threshold value for detecting a characteristic part of the inspection object is determined according to a luminance histogram of the fluoroscopic image, and a characteristic part of the inspection object in the X-ray fluoroscopic image is extracted based on the threshold value. Image processing means,
An object identification apparatus comprising: a determining unit that obtains a feature amount of the extracted feature portion and determines a type of the inspection object according to the feature amount. The inspection object is a shell that has been left in the ground,
The first image processing means detects an image area in the fluoroscopic image such as a cartridge case, a warhead plug, a tail wing, etc. in the shell, excludes the image area from an image processing target, and performs the second image processing. means to claim 3 is intended to be subjected to detection of the feature quantity extracting characteristic portion of the projectile in the X-ray fluoroscopy the showing X-ray fluoroscopic image by using a threshold value set based on the luminance histogram of the image The object identification device described.