영상 안정화를 이용한 고속화된 지상 이동 표적 탐지 방법

김정석,김대환 한국정보과학회 2022 정보과학회 컴퓨팅의 실제 논문지 Vol.28 No.7

Moving target indication (MTI) has been widely used as a technology for detecting moving targets. The moving target indication technique can effectively detect a moving target by generating a difference image between the previous and current images. However, a moving target indication technique must be used for each frame, which causes a very large amount of computation from the signal processor. Also, there is a risk of providing inaccurate detection information to the tracking filter due to image stabilization failure. This paper describes image stabilization and moving target candidate detection methods for moving target detection. The frame interval to be used for image stabilization is adjusted using the moving target size or distance information. It is designed to increase the usability of image data through the use of multi-process for image stabilization. It is possible to detect moving target in a short time by increasing the usability of image data. According to the image stabilization success determination logic, moving target detection is performed only when image stabilization is successful. Through this, it is possible to minimize the effect of image stabilization failure and to detect moving target stably. 이동표적을 탐지하는 기술로 이동표적표시 기술(MTI, Moving target indication)이 많이 사용되어왔다. 이동표적표시 기술은 이전, 현재 영상 간의 차영상 생성을 통해 효과적으로 이동물체를 검출할 수 있는 기술이다. 단, 차영상 생성을 위해 영상 안정화 및 영상 전처리, 매 프레임마다 이동표적표시 기술을 사용하여야 하는데 신호처리기 입장에선 매우 부담스러운 연산량을 유발한다. 또한 영상 안정화 실패로 인해 부정확한 검출 정보를 추적 필터에 제공하게 되는 위험성이 존재한다. 본 논문에서는 지상 이동 표적 탐지를 위하여 신뢰도를 보장한 영상 안정화 고속화 방법과 이동표적 후보 탐지 방법에 대하여 설명한다. 영상 내 이동 표적 사이즈 또는 표적과의 거리 정보를 이용하여 영상 안정화에 사용될 프레임 간격을 동적으로 조절하고, 영상 안정화를 위한 멀티 프로세스 운용을 통해 영상 데이터의 활용성을 높일 수 있도록 설계하였다. 영상 데이터의 활용성을 높임으로써, 이동 물체 탐지를 빠른 시간 안에 할 수 있으며, 영상 안정화 성공 판단 로직에 따라 영상 안정화에 성공한 프레임만을 이동 물체 검출에 사용하기 때문에 영상 안정화 실패 시에 미치는 영향성을 최소화하고, 안정적으로 이동 물체를 탐지할 수 있도록 설계하였다.

가족건강성이 결혼이미지에 미치는 영향

강인 사단법인 인문사회과학기술융합학회 2019 예술인문사회융합멀티미디어논문지 Vol.9 No.12

This study conducted a survey of 272 people from March 1 to June 15, 2019 to examine the impact of family strength on image of marriage, and the results are as follows. First, in the differences of family strength according to gender, men were significantly higher than women in the "economic stability and cooperation" among sub-variables of family strength. Second, in the difference of image of marriage by gender, men were significantly more positive about image of marriage than women. Third, in the difference of family strength according to age, people in their 20s and 30s were significantly higher than those in their 40s and 50s in the "economic stability and cooperation" among sub-variables of family strength. Fourth, the difference in age-related image of marriage was not significant. Fifth, as a result of examining the effect of family strength on image of marriage, men perceived image of marriage significantly higher than women, and the higher perceived “mutual trust and acceptance” among sub-variables of family strength, the higher perceived marriage image. 본 연구는 가족건강성이 결혼이미지에 미치는 영향을 살펴보기 위하여 272명을 대상으로 2019년 3월 1일부터 6월 15일까지 설문조사를 실시하였으며 본 결과는 다음과 같다. 첫째, 성별에 따라 가족건강성의 차이를 살펴본 결과, 가족건강성의 하위요인 가운데 ‘경제안정과 협력’ 하위요인에서 남성이 여성보다 더 높은 것으로 나타났다. 둘째, 성별에 따른 결혼이미지의 차이를 살펴본 결과, 남성이 여성보다 유의미하게 결혼이미지가 더 긍정적인 것으로 나타났다. 셋째, 연령에 따라 가족건강성의 차이를 살펴본 결과, 가족건강성의 하위요인 가운데, ‘경제안정과 협력’ 하위요인에서 20대와 30대가 40대와 50대보다 유의미하게 더 높은 것으로 나타났다. 넷째, 연령에 따른 결혼이미지의 차이는 유의미하지 않은 것으로 나타났다. 다섯째, 가족건강성이 결혼이미지에 미치는 영향을 살펴본 결과, 남성이 여성보다 결혼이미지를 유의미하게 더 높게 지각하고, 가족건강성 가운데 ‘상호존중과 수용’이 높을수록 결혼이미지를 유의미하게 더 높게 지각하는 것으로 나타났다.

이동 로봇을 위한 하이브리드 이미지 안정화 시스템의 개발

최윤원(Yun Won Choi),강태훈(Tae Hun Kang),Dilshat Saitov,이동춘(Dong Chun Lee),이석규(Suk Gyu Lee) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.2

This paper proposes a hybrid image stabilizing system which uses both optical image stabilizing system based on EKF (Extended Kalman Filter) and digital image stabilization based on SURF (Speeded Up Robust Feature). Though image information is one of the most efficient data for object recognition, it is susceptible to noise which results from internal vibration as well as external factors. The blurred image obtained by the camera mounted on a robot makes it difficult for the robot to recognize its environment. The proposed system estimates shaking angle through EKF based on the information from inclinometer and gyro sensor to stabilize the image. In addition, extracting the feature points around rotation axis using SURF which is robust to change in scale or rotation enhances processing speed by removing unnecessary operations using Hessian matrix. The experimental results using the proposed hybrid system shows its effectiveness in extended frequency range.

외모관리행동에 따른 신체이미지와 심리적 안정감에 관한 연구

이정민 ( Jeong Min Lee ),장혜선 ( Hye Sun Jang ) 한국미용학회 2013 한국미용학회지 Vol.19 No.6

With the economic growth, social and cultural development, the life expectancy has increased and the quality of life has been improved. As a result, the concept of beauty has been diversified, and the outward appearance has taken added importance, has heightened the interest in the outward appearance management. The outward appearance management behavior brings not only the physical health but the sense of psychological stability. In this study, women in their twenties were surveyed through the questionnaires to look into the effect of women`s outward appearance management behavior on body image, and examine the sense of psychological stability which results from the outward appearance management. The results of this study showed that the outward appearance management behavior has a significant positive effect on body image and the sense of psychological stability. furthermore the body image was found to have a significant positive effect on the sense of psychological stability. Based on such results, it was found that women`s outward appearance management behavior acted as a major variable in forming the positive idea towards the body, sense of psychological stability, and self-confidence. This study is meaningful in that it provided basic data for the development of beauty programs related to women.

표적 영상 중심추적 기반 LUT를 활용한 열 화상 카메라의 줌 렌즈 구동 흔들림 보상기법

김병학(Byeong Hak Kim),김민영(Min Young Kim) 제어로봇시스템학회 2017 제어·로봇·시스템학회 논문지 Vol.23 No.2

The magnification of infrared and normal tracking cameras for advanced aircraft and autonomous vehicles need to be continuously adjusted using a lens driving function to define target objects and keep track of them. However, they still suffer from the problem of retaining stability of the focused image even when a continuous zoom lens driving situation is in operation. According to the mechanical motion characteristics of a magnification lens, the motorized movement of the lens causes an incremental spiral motion on the image along the direction of movement. In addition, the optical alignment error in the zoom lens, moving stages, and imaging area seriously amplifies this problem. The spiral movement of the video image is clearly observed on a user monitor if it is in focus during zooming in or out. The spiral motion is more clearly observed under high magnification than under low magnification, so serious inconvenience is caused for users at high magnification. To solve this problem, an image-based compensation algorithm based on quantitative measurement of spiral image movement in zoom driving was investigated. First, image movement was measured and analyzed under continuous zoom lens driving conditions with a standard target image and a collimator system based on a centroid tracking algorithm. Second, a proposed motion compensation technique using a look-up table (LUT) constructed from the measured movements was applied. To prove the validation of this technique, a series of experiments were performed on a real forward looking infrared (FLIR) image sensor system with a zoom lens structure. It was confirmed that the technique can significantly reduce the spiral movement induced by zooming in or out to ±1 pixel.

지적측량조직 이미지와 취업선호도에 관한 연구

이상국(Lee Sang Kug),장우진(Jang Woo Jin) 한국지적정보학회 2008 한국지적정보학회지 Vol.10 No.2

본 연구의 목적은 보편적으로 특정대상을 기술할 때 사용되는 형용사들 중에서 지적측량조직으로서 대표격인 대한지적공사의 이미지를 나타내는데 적합한 특수 용어들을 찾아내고 취업선호도와의 관계를 실증분석하여, 대한지적공사 이미지와 학생들의 취업지도 측면에서의 전략적 관리를 위한 기초정보를 제공하는데 있다. 이상의 연구목적을 달성하기 위하여 본 연구는 다음과 같은 핵심적인 3단계로 진행되었다. 첫 번째 연구단계에서는 지적학을 전공하는 대학생 183명이 대한지적공사의 이미지를 나타내기 위한 47개의 특성용어들의 적절성에 대해 실증 평가하였다. 두 번째 연구단계에서는 대학생들의 평가자료를 토대로 내재되어 있는 요인구조를 탐색하기 위하여 요인분석을 실시하였다. 그 결과 견실성, 지성, 성취지향성, 야성, 관료적권위성 등과 같은 5개 요인구조를 갖는 것으로 분석되었다. 세 번째 연구단계에서는 대한지적공사의 취업선호성에 대한 이미지 요인들의 영향력 관계를 실증 분석하였다. 분석 결과, 견실성(β=.481 p<.000), 지성(β=.373 p<.000), 성취지향성(β=.270 p<.000) 등의 순서로 통계적으로 유의한 관계(영향력)을 갖는 것으로 분석되었다. 그러나 관료적권위성(β=.069 ns)과 야성요인(β=.035 ns)은 통계적으로 유의한 관계가 확인되지 않았다. 그리고 이상의 분석결과에 대한 종합적인 논의와 함께 향후 연구방향과 제한점 등을 논의하면서 연구내용을 정리하였다. The purpose of this study was to select appropriate trait adjectives describing korea cadastral survey corporation image. And analyzed the extent showing that the definite images are explaining job preference. For this purpose, three steps were conducted. In study the first steps, total 183 college students rated each of 47 trait adjectives on appropriateness in describing korea cadastral survey corporation image. The second steps, ratings were analyzed by common factor analysis. It was found that there are five(stability, intellect, achievement orientation, propulsion, bureaucratic authority) latent dimensions in those trait adjectives. The third steps, the multi regression analysis from determinative five image factors of job preference are as follows : the ranks of importance effect are stability(β=.481 p<.000), intellect(β=.373 p<.000), achievement orientation(β=.270 p<.000). but the effect between jon preference and bureaucratic authority(β=.069 ㎱), propulsion(β=.035 ㎱) is not significant. Lastly the limitation of this study and additional research tasks were discussed.

Improved image alignment algorithm based on projective invariant for aerial video stabilization

( Meng Yi ),( Bao-long Guo ),( Chun-man Yan ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.9

In many moving object detection problems of an aerial video, accurate and robust stabilization is of critical importance. In this paper, a novel accurate image alignment algorithm for aerial electronic image stabilization (EIS) is described. The feature points are first selected using optimal derivative filters based Harris detector, which can improve differentiation accuracy and obtain the precise coordinates of feature points. Then we choose the Delaunay Triangulation edges to find the matching pairs between feature points in overlapping images. The most “useful” matching points that belong to the background are used to find the global transformation parameters using the projective invariant. Finally, intentional motion of the camera is accumulated for correction by Sage-Husa adaptive filtering. Experiment results illustrate that the proposed algorithm is applied to the aerial captured video sequences with various dynamic scenes for performance demonstrations.

이미지 형성 장치에서의 이산 제어 안정성

우상범(Sangbum Woo),김성대(Sung-Dae Kim),김종태(Jongtae Kim),박영재(Young-Jae Park) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11

In general, an electro-photographic image forming apparatus, such as a laser printer, a digital copier, and the like, printed images are composed of multiple colors. If images of different colors overlap at misaligned positions, the resultant images will come to have blurred edges. In order to prevent deterioration of print quality, accurately aligning images of different colors to overlap them at exact positions is needed. In this paper, the stability of the image forming system controlled by averaging the registration errors is shown and the control law is proposed that guarantees the system stability.

A Method for Evaluation of an Optical Image Stabilizer in an Image Sensor Module

신상철,엄원석,김석민,강신일 한국정밀공학회 2011 International Journal of Precision Engineering and Vol.12 No.2

A figure of merit called the image clarity index is proposed for quantifying the performance of an optical image stabilizer (OIS) subjected to hand jitter. The image clarity index is defined as the slope angle of the normalized edge spread intensity of a captured image. A two-dimensional map of the index can offer clues as to the design limit on shake angle and frequency. Because of its relative simplicity over the existing metrics such as the modulation transfer function, the proposed index is especially suitable for summary evaluation of OISs and rapid benchmarking of OIS-equipped image sensor modules.

Fast Image Stitching For Video Stabilization Using Sift Feature Points

Mostafiz Mehebuba Hossain(모스타피즈 메헤부바 후세인),Hyuk-Jae Lee(이혁재),Jaesung Lee(이재성) 한국통신학회 2014 韓國通信學會論文誌 Vol.39 No.10(융합기술)

Video Stabilization For Vehicular Applications Is An Important Method Of Removing Unwanted Shaky Motions From Unstable Videos. In This Paper, An Improved Video Stabilization Method With Image Stitching Has Been Proposed. Scale Invariant Feature Transform (Sift) Matching Is Used To Calculate The New Position Of The Points In Next Frame. Image Stitching Is Done In Every Frame To Get Stabilized Frames To Provide Stable Video As Well As A Better Understanding Of The Previous Frame’S Position And Show The Surrounding Objects Together. The Computational Complexity Of Sift (Scale-Invariant Feature Transform) Is Reduced By Reducing The Sift Descriptors Size And Resticting The Number Of Keypints To Be Extracted. Also, A Modified Matching Procedure Is Proposed To Improve The Accuracy Of The Stabilization.