한국산업융합학회 논문집 (Journal of the Korean Society of Industry Convergence)
- 제13권1호
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- Pages.23-30
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- 2010
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- 1226-833X(pISSN)
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- 2765-5415(eISSN)
비선형 히스토그램 평활화 함수에 의한 의료영상의 화질개선
Quality Enhancement of Medical Images by Using Nonlinear Histogram Equalization Function
- 조용현 (대구가톨릭대학교 컴퓨터정보통신)
- Cho, Yong-Hyun (Catholic University of Daegu Computer Information Communications Engineering)
- 투고 : 2009.09.25
- 심사 : 2010.01.22
- 발행 : 2010.02.28
초록
This paper presents a histogram equalization based on the nonlinear transformation function for enhancing the quality of medical images. The nonlinear transformation function is applied to adaptively equalize the brightness of the image according to its intensity level frequency. The logistic function is used as a nonlinear transformation function, which is calculated by only using the intensity level with maximum frequency and the maximum intensity level in an histogram, and the total number of pixels. The proposed method has been applied for equalizing 8 medical images with a different resolution and histogram distribution. The experimental results show that the proposed method has the superior enhancement performances compared with the conventional histogram equalization. And the proposed histogram equalization can be used in various multimedia systems in real-time.