Real-Time Continuous-Scale Image Interpolation with Directional Smoothing

Yoo, Yoonjong,Shin, Jeongho,Paik, Joonki The Institute of Electronics and Information Engin 2014 IEIE Transactions on Smart Processing & Computing Vol.3 No.3

A real-time, continuous-scale image interpolation method is proposed based on a bilinear interpolation with directionally adaptive low-pass filtering. The proposed algorithm was optimized for hardware implementation. The ordinary bi-linear interpolation method has blocking artifacts. The proposed algorithm solves this problem using directionally adaptive low-pass filtering. The algorithm can also solve the severe blurring problem by selectively choosing low-pass filter coefficients. Therefore, the proposed interpolation algorithm can realize a high-quality image scaler for a range of imaging systems, such as digital cameras, CCTV and digital flat panel displays.

Minimum Statistics-Based Noise Power Estimation for Parametric Image Restoration

Yoo, Yoonjong,Shin, Jeongho,Paik, Joonki The Institute of Electronics and Information Engin 2014 IEIE Transactions on Smart Processing & Computing Vol.3 No.2

This paper describes a method to estimate the noise power using the minimum statistics approach, which was originally proposed for audio processing. The proposed minimum statistics-based method separates a noisy image into multiple frequency bands using the three-level discrete wavelet transform. By assuming that the output of the high-pass filter contains both signal detail and noise, the proposed algorithm extracts the region of pure noise from the high frequency band using an appropriate threshold. The region of pure noise, which is free from the signal detail part and the DC component, is well suited for minimum statistics condition, where the noise power can be extracted easily. The proposed algorithm reduces the computational load significantly through the use of a simple processing architecture without iteration with an estimation accuracy greater than 90% for strong noise at 0 to 40dB SNR of the input image. Furthermore, the well restored image can be obtained using the estimated noise power information in parametric image restoration algorithms, such as the classical parametric Wiener or ForWaRD image restoration filters. The experimental results show that the proposed algorithm can estimate the noise power accurately, and is particularly suitable for fast, low-cost image restoration or enhancement applications.

Flicker removal for CMOS wide dynamic range imaging based on alternating current component analysis

Yoonjong Yoo,Jaehyun Im,Joonki Paik IEEE 2014 IEEE transactions on consumer electronics Vol.60 No.3

<P>This paper presents a novel wide dynamic range system to reduce flickering artifact produced by a high speed electronic rolling shutter in a CMOS image sensor. The proposed algorithm removes flicker artifact in the shortexposure image using a correlation between the pair of two differently exposed images to extend the dynamic range. Since the proposed method overcomes the electronic shutter problem in a conventional wide dynamic range imaging system, it can remove the flicker artifact under an alternating current light source such as a fluorescent bulb.</P>

Fast Adaptive Mode Decision for H.264/AVC High Profile

Yoonjong Yoo,Yonghwan Kim,Jinwoo Yoo,Joonki Paik 대한전자공학회 2005 ITC-CSCC :International Technical Conference on Ci Vol.2005 No.4

Optimal PSF Selection Using Second-Order Frequency Analysis for Digital Autofocusing

Yoonjong Yoo,Jinbeum Jang,Jeongho Shin,Joonki Paik 중앙대학교 영상콘텐츠융합연구소 2015 TechArt :Journal of Arts and Imaging Science Vol.2 No.1

방향적응적인 연속 비율 실시간 영상 보간 방식 : 방향별 가우시안 필터를 사용한 연속 비율 지원 영상 보간 필터

유윤종(Yoonjong Yoo),전신영(Sinyoung Jun),비벡 마이크(Vivek Maik),백준기(Joonki Paik) 한국HCI학회 2009 한국HCI학회 학술대회 Vol.2009 No.2

방향 적응적인 저대역 통과 필터를 사용한 보간 방식은 화소의 방향성에 따른 적응적인 필터 처리를 통하여 가로 세로의 비율이 다른 보간을 수행할 시 생기는 영상의 왜곡을 최소화 한 방식이다. 본 방식은 하드웨어 적인 구현에 적합하도록 설계 되었으며, 영상의 보간 시사용하는 저대역 통과 필터 처리 강도의 조절이 용이하여 최종 영상의 선명도를 쉽게 변경 할 수 있다는 장점을 가지고 있다. 적은 연산량과 화질의 변경이 용이 함으로 인하여, 본 기술은 디지털 카메라, CCTV, 평판 디스플레이 장치 등 영상 보간 기술이 필요한 영상 장비에 적용될 수 있다. A real-time, continuous-scale image interpolation method is proposed based on bi-linear interpolation with directionally adaptive low-pass filtering. The proposed algorithm has been optimized for hardware implementation. The original bi-linear interpolation method has blocking artifact. The proposed algorithm solves this problem using directionally adaptive low-pass filtering. It can also solve the severely problem by selection choosing low-pass filter coefficients. Therefore the proposed interpolation algorithm can realize a high-quality image scaler for various imaging systems, such as digital camera, CCTV and digital flat panel display, to name a few.

색상 분포 분석을 통한 자동 백색 조정 방법

유윤종(Yoonjong Yoo),조태호(Taeho Cho),정회인(Hweihn Chung),김효주(Hyoju Kim) 대한전자공학회 2010 대한전자공학회 학술대회 Vol.2010 No.6

The existing Auto White Balance(AWB) method has a problem at taking a single color object. Therefore, Auto Tracking White(ATW) method solve this problem using stop operating technique at the outside of interesting light temperature. But ATW method doesn"t react the consist of objects which has the outside interesting region light temperature. The proposed algorithm solve this problem using color distribution analysis.

이름을 밝히는 것인가? 거부하는 것인가?: ‘신의 비밀스런 이름’에 비추어본 출애굽기 3:14

유윤종 ( Yoo Yoonjong ) 한국서양고대역사문화학회 ( 구 한국서양고대사학회 ) 2016 서양고대사연구 Vol.46 No.-

이 글은 이집트 및 구약성서에 나타난 신의 비밀스런 이름이라는 주제에 비추어 출애굽기 3:14에 표현된 하나님의 이름에 관한 논쟁을 재해석한다. 신의 비밀스런 이름이라는 주제에서 보아 출애굽기 3:14의 □□□는 하나님의 이름을 밝히려는 것보다는 이름을 밝히기를 거부하는 것으로 해석하는 것이 더 적절하다고 결론 내린다. 더 나아가 이 해석을 본문에 대한 YHWH에 대한 언어유희적 측면에서 가지는 의미를 찾는다. This paper seeks to reexamine a serious expression □□□, from Exodus 3:14 in the light of the ‘divine secret name’ motif commonly scattered across ancient Egyptian mythology. The verse has been debated hotly in scholarly circles because it is assumed that it would provide the answer to a debate about an original derivation of YHWH (Tetragrammaton), which is still under discussion. This study is developed upon an analysis of the context of Exodus 3 (chapter 2) and previous studies which are grouped according to those who accepted the verse as revealing YHWH’s name and the others who regarded it as refusal to reveal [not revealing?](chapter 3). It investigates the theme of the divine secret name in an Egyptian myth called ‘The Legend of Isis and the Name of Re’ and two other biblical verses (Gen 32:29; Judg 13:18) (chapter 4). It has been observed that the theme of divine secret names is displayed widely in Egypt and mythologies related to names have been heavily developed. In Egyptian myth, the secret names of the supreme god Ra or Amun is never revealed. It is noteworthy that the theme of divine secret names plays a significant role in constituting the hierarchy of the divine world order in Egypt. A higher god has a secret name by which he or she controls a lower god, and thus a lower god tries to discover the secret name of a higher god. Between the two gods, plot unfolds and struggles occur. The Bible does not accept such a concept in YHWH theology fully, but the motif of a divine secret name is still partly contained. In two theophoric contexts in Genesis 32:29 and Judges 13:18, YHWH did not reveal his true name. Thus it is better interpreted that God refused to reveal his true name. It is believed that God is not controled by such magical use of his name. Accordingly it is concluded that the expression □□□, in Exodus 3:14 is an indirect refusal to reveal YHWH’s name. Instead, it is suggested that the expression needs to be interpreted as a wordplay on YHWH symbolizing the divine presence with Moses and the Israeli people. This study does not resolve all matters regarding Exodus 3:14, but it is proposed that the theme of divine secret names would be added evidence proving the theory of the refusal to reveal YHWH’s name.

출애굽기 1:1-15:21에 나타난 ‘이름’의 문학적 및 신학적 의미

유윤종(Yoonjong Yoo) 대한성서공회 2017 성경원문연구 Vol.- No.41

Names play a very important role in the literature of ancient Near East. It had been believed that names have the power to make true its nature and characters. Thus having the authority to call names means to have the power to control the power of people or deities represented in their names. According to Egyptian mythology, divine order is controled by hidden names of superior gods to inferior ones. The English book name of Exodus is called Shemot (Names) in the Jewish tradition in accordance with the second word of Exodus 1:1. This paper purposes to show how names in Exodus 1:1-15:21 are presented, and pursues to interpret the literary and theological significance of names according to the general concept of names in ancient Near East. Methodologically, I will take synchronic approach by which does not raise how the texts had been developed. It is noteworthy that on the one hand, names are hidden, but are revealed in Exodus 1:1-15:21 on the other. First of all, I’ve done exegetical work with texts in which personal or divine names are revealed and hidden, and classified texts in which names are revealed as follows: ancestors from Canaan (1:1-7), two midwives (1:15), Moses (2:10), Moses’s wife and son (2:16-22), YHWH (6:2-5), Moses’s parents and brother (6:16-20), and YHWH (15:3). The list of hidden names are as follows: Pharaoh (1:8, 11, 15, 17, 18, 19, 22), Moses’ parents and sister (2:1-10), divine name Ehye (3:14), the Sun god Ra (10:10, 12-14, 21-23), and Egyptian gods in ten plagues (7:14-10:29; 12:12). It is maintained that the motif of revealing and hidden names in Exodus 1:1-15:29 has literary and theological significance. Literary significance can be summarized as follows: 1) The name motif supports that the first part of Exodus is 1:1-15:29. 2) The divine name YHWH plays a key role: YHWH not revealed (1:1-2:22), YHWH alluded (2:23-6:1), YHWH revealed (6:2-14:31), and YHWH proved (15:1-21). 3) Moses’s name alludes future redemption in the Reed Seas. It also has the following theological implications: 1) In 1:1-2:22, YHWH seems to be hidden, but he works secretly to protect the people of Israel. 2) In 2:23-6:1, YHWH appears to Moses without revealing his name, but alluded his assurance of being with Moses. 3) In 6:2-14:31, YWHH is revealed in the struggle with Pharaoh, and destroyed Pharaoh with ten plagues and the great victory in the Reed Seas. 4) In 15:1-21, the power of the name YHWH is proved. It is concluded that knowing the name YHWH is to know the nature and character of YHWH. The name motif occurs mainly in the first part of the book of Exodus, but in the second (15:22-18:27) and the third parts (19:1-40:38), Israelites learn to know how to live with the name YHWH and to serve the name YHWH. Accordingly it is suggested with certainty that the name ‘Shemot’ be the most appropriate name for the book of Exodus.

ISOTROPIC OUT-OF-FOCUS BLUR IDENTIFICATION AND RING ARTIFACT REMOVAL FOR FULLY-DIGITAL AUTO-FOCUSING

Jungsoo Lee,Yoonjong Yoo,Jeongho Shin,Joonki Paik 대한전자공학회 2005 ITC-CSCC :International Technical Conference on Ci Vol.2005 No.3