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홍승홍 대한전자공학회 1975 전자공학회지 Vol.12 No.1
잡음을 포함한 저화질의용화상의 배경과 목적대상정을 분할하는 환경영역은 중요한 정보로 의학상 진단에 큰 의의를 갖고 있다. 이 논문의 목적은 화상의 농도변화를 정총화하여 통계적수법에 의해 환경영역을 결정하는 threshold를 구하는 방법을 제시하고 이를 비 scintigram에 적용하여 실험을 행했다. 전화상을 64개의 소영역으로 나누고 경계영역이 존재하는 부분온 선택하며 이 부분에 maximum likelihood법을 적용하여 threshold를 결정한뒤 내삽법에 의해 전화소에 대한 threshold를 구하고 수곽을 포함한 2식화면을 구했다. 이의 결과는 인간의 인식과 거의 같은 결과로 동적해석방법의 유효성이 증명되었다. The boundary has been one of the most important information in radiographic images and the degrees of difficulty involved varies greatly with the quality of the picture. These Buantifications are the means to diagnoses. The purpose of this paper is to quantify intensity variation and the threshold decision which is based on statistical principles and is developed to detect limits in liver scintigrams the entire picture is devide4 into 64 small regions. The kurtosis and variances for each smal region are used as indications to select the histograms the thresholds are computed according to the method o(maximum likelihood which minimizes the probability o( misclassification. Therefore Ive have demonstrated the applicability of the boundary detection and proved good agreement with human recognition, and we can use it for the diagnosis data of liver disease. The boundary has been one of the most important information in radiographic images and the degrees of difficulty involved varies greatly with the quality of the picture. These Buantifications are the means to diagnoses. The purpose of this paper is to quantify intensity variation and the threshold decision which is based on statistical principles and is developed to detect limits in liver scintigrams the entire picture is devide4 into 64 small regions. The kurtosis and variances for each smal region are used as indications to select the histograms the thresholds are computed according to the method o(maximum likelihood which minimizes the probability o( misclassification. Therefore Ive have demonstrated the applicability of the boundary detection and proved good agreement with human recognition, and we can use it for the diagnosis data of liver disease.
홍승홍 대한전자공학회 1978 전자공학회지 Vol.15 No.1
맥파검출용변환기설계의 기초자료 확립과 설계된 변환기를 이용한 맥추계구성 및 검출된 파형의 임상적 유효성을 검토했다. 광학적 검출방식에 의한 출력파형은 대동장의 생리학적인 이론파형과 동일한 파형으로 맥관계의 한 정보로써 이용할 수 있으며 여전소자에 의한 맥파의 미분파형은 고령자에게서 잘 나타나지 않는 절역의 정보가 분명히 표시되어져 임혈시간의 측정이 용이하다. 42명에 대한 평균임혈시간이 0.324±0.027초로 얻어져 생리학적 이론치와 같으며 맥파전달시간의 측정가능성이 검토되어졌다. This paper described the establishment of the basic data for the design of the transducer for the detection of plethysmogram, the structure of pulsimeter utilizing the designed transducer and the clinical usefulness of detected waveform of the optical detection method can be utilized as an information of cardiovascular system as physiological theoretical waveform of aorta, and derivative of plethysmogram by piezo electric elements clearly shows the information of incisura which does not appear at the old age and this makes the measuring of ejection time to be easy. The ejection time of average for 42 persons shows 0.324 $\pm$ 0.027 sec. and this value is in good agreement with the theoretical value, and the possibility of measuring the velocity of pulse conduction has been studied.