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Mixed-LGP와 해마 구조를 적용한 CNN을 이용한 얼굴검출 알고리즘 연구
공기호(Ki-Ho Kong),강대성(Dae-Seong Kang) 한국정보기술학회 2018 한국정보기술학회논문지 Vol.16 No.1
A precise preprocessing process is required for more accurate face recognition. The preprocessing process is based on LGP(Local Gradient Pattern), which is robust against external influences such as illumination, facial expression, and background, rather than the existing LBP(Local Binary Pattern). We use uniform features and multi-feature channel based on Gradient, Orientations, Intensity, and Edge to better locate facial features in LGP-based algorithms. Symmetry features are used to speed up complex patterns by reducing them. In this paper, we propose an algorithm that uses CNN (Convolution Neural Network) applied hippocampal structure for more accurate face Detection. We used Yale face data base, BioID face data base, and MU + MIT date base to evaluate the performance of the proposed algorithm. Experimental results show that the algorithm is improved by 3 ~ 9%.
공기화(Ki Hwa Kong),이순희(Soon Hee Lee) 한국발육발달학회 1996 한국발육발달학회지 Vol.4 No.1
This study is surveyed MIA and menarcheal age of high school gu`1 students in Korea.. This subject are 289girls in Pusan, Ulsan, Unyang, Cheju and Namhae. This study is comparative analysis of MIA, menarclaeal age, height and weight at menarcheal age of subjects. The conulusions of the study are as follows : 1. The Growth, Acceleration of height is continued to Korean girls. Height of metropolitan`s girls showed taller than middle and small cities, rural and islands girls. 2. CIA of high school girls on 1996 showed earlier than one girls on 1985. The Growth Acceleration of height arid MIA that are middle and small city, rual and island subjects are accelerated more rapidly than one of metropolitan. 3. Menacheal age of Koran girls is 12.59∼13.01 years, their menarcheal ages are occured earlier 0.63 years/decade∼1.05 years/decade than late. 4. Height at menachal age of Kin girls is showed shout 152㎝, weight is 45.5㎏ at that time Menache is happened late 2.5 year of the Height - MIA and 1.7 years of the Weight - MIA. 5. Height and weight at menacheal age are decreasing differences between each regions. Menarcheal age of metropolitan girls tendency to stagnation of the growth acceration recently.
피부색과 S-LGP와 U-LGP기반 CNN을 이용한 얼굴 검출 알고리즘 연구
공기호(Ki-Ho Kong),강대성(Dae-Seong Kang) 한국정보기술학회 2017 한국정보기술학회논문지 Vol.15 No.1
In this paper, we propose S-LGP and U-LGP based on LGP which is stronger against external factors such as illumination change, facial expression, background, etc. than LBP in order to make the facial recognition exactly. Because LGP has various feature values, it speeds up the complex feature value and extracts specific pattern to improve accuracy by Symmetry method and Uniform method. Then, we learn CNN through a cascaded classification detector that extracts positive and negative facial samples from skin color detection in YCbCr space at 1: 2 ratio. The algorithm proposed in this paper can improve the accuracy of face detection by learning two methods of face detection in CNN. The detection rate of the proposed algorithm is 97% and has higher detection rate than the existing LBP and LGP.