초록 ▼

An original picture taken by an ITV camera is subject to a local maximum filter processing and, if necessary, further to a local minimum filter processing, so that a background image is formed from the original picture itself. A target image included in the original picture is extracted separated fr

An original picture taken by an ITV camera is subject to a local maximum filter processing and, if necessary, further to a local minimum filter processing, so that a background image is formed from the original picture itself. A target image included in the original picture is extracted separated from the background image by the subtraction between the thus obtained background image and the original picture. According to the present invention, since the background image is formed on the basis of the original picture, the unevenness or change of brightness, which equally influences on both of the target image and the background image, has no influence on the accurate extraction of the target image.

대표청구항 ▼

A method for processing an original picture of a gray image composed of a target image and a background image to extract the target image separated from the background image, comprising the steps of: (a) obtaining a background image by processing gray levels of the original picture; and (b) extracti

A method for processing an original picture of a gray image composed of a target image and a background image to extract the target image separated from the background image, comprising the steps of: (a) obtaining a background image by processing gray levels of the original picture; and (b) extracting the target image on the basis of a different image between the original picture and the background image obtained in step (a).