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황희융(Hee Yeung Hwang),김민환(Min Hwan Kim),정주성(Ju Seong Jong) 한국정보과학회 1987 정보과학회논문지 Vol.14 No.4
Hough변환에서의 매개변수공간(parameter space)을 다차원의 누적배열(accumulator array)로 표현하는 대신에 단지 매개변수 갯수만큼의 일차원 배열들로 표현하여, 후보점의 각 매개변수값이 따로따로 누적되도록 하였다. 이때 이러한 배열에 이미 누적된 값들로부터 얻어지는 지역적 최대값(local maximum)들간의 관계를 이용해 가중치(weighting value)를 누적시켜 나가는 상호협력연산방법을 사용하였다. 본 변환방법은 매우 적은 양의 소요메모리를 필요로 하므로 소형전산기에서도 구현가능하다. 특히, 매개변수가 많은 경우에 매우 유용하다. 본 연구에서는 유한 개의 매개변수로 표현되는 함수패턴에 대해서만 다루었다. In this paper, a cooperative computation model for the Hough transform is suggested. The parameter space is represented as a set of one-dimensional arrays, which are designated by projection arrays. The votes on this space are accumulated with weighting values, by using the contextual information which can be obtained from the relation between local maxima of these arrays. Only the analytical shapes are treated in this paper. This model can be implemented on a microcomputer, because the amount of storage required for the parameter space is very small. It is especially useful when the parameter space has a large number of dimensions.
Study on Error Check and State Reduction of State Diagram Using Logic Programming
이극,김민환,황희융,Lee, Geuk,Kim, Min-Hwan,Hwang, Hee-Yeung 대한전기학회 1986 전기학회논문지 Vol.35 No.11
This paper is concerned with the techniques of error check and reduction of state diagram using logic programming. Error check program aims to check not only syntax errors but also semantic errors. And reduction program optimizes the state diagram by finding the redundant equivalence states and removing those from the set of states. The input of both program is state diagram represented as state table form. The output of error check program is error comment. The output of reduction program is equivalence reduced state table. Both programs are implemented using prolog. Prolog has very powerful pattern matching, and its automatic back-tracking capabilities facilitate easy-to-write error check and reduction programs.