Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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A New Image Processing Method for Digital Chest Radiographs based on Human Visual System

인간의 시각특성에 의거한 디지털 흉부 x-선 영상의 처리 기법

  • Kim, Jong-Hyo (Institute of Medical Engineering College of Med., Seoul National University) ;
  • Park, Kwang-Suk (Dept. of Medical Engineering College of Medicine, Seoul National University) ;
  • Min, Byoung-Goo (Dept. of Medical Engineering College of Medicine, Seoul National University) ;
  • Lim, Jung-Gi (Dept. of Radiology College of Medicine, Seoul National University) ;
  • Han, Man-Cheong (Dept. of Radiology College of Medicine, Seoul National University) ;
  • Lee, Choong-Woong (Dept. of Electronics, Seoul National University)
  • Published : 1990.11.16
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Abstract

In this paper, a new adaptive image processing method based on human visual system has been presented. The basic idea behind the proposed method is to improve the efficiency of the information transfer channel regionally by manipulating the displayed image in order to compensate the regional inefficiency of the information transfer channel. The proposed method consists of two parts; the first part reallocates pixel values corresponding to high X-ray attenuation to that of more intense X-ray exposure by multiplying the pixel values with the local adaptive multiplcation factor, and the second part adjusts the pixel values of dark area of displayed image such as overexposed lung area to be more bright. The processed image with the proposed method shows significantly increased visibility of mediastinal and subdiaphramatic area, and also the lung area of over exposed case without any artifact.

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