ETRI-Knowledge Sharing Plaform

ENGLISH

성과물

논문 검색
구분 SCI
연도 ~ 키워드

상세정보

학술지 Practical anti-vignetting methods for digital cameras
Cited 111 time in scopus Download 1 time Share share facebook twitter linkedin kakaostory
저자
유원필
발행일
200411
출처
IEEE Transactions on Consumer Electronics, v.50 no.4, pp.975-983
ISSN
0098-3063
출판사
IEEE
DOI
https://dx.doi.org/10.1109/TCE.2004.1362487
협약과제
04MI1500, URC를 위한 내장형 컴포넌트 기술개발 및 표준화, 조영조
초록
Vignetting is a position-dependent light intensity falloff commonly found for commercial digital cameras. An anti-vignetting method is concerned with the estimation of a correction factor at each pixel position. In this paper, we propose two anti-vignetting methods which effectively estimate the distribution of correction factors. The first method utilizes wavelet-based denoising for efficient suppression of input image noise. Decimation of the smoothed distribution of correction factors is then carried out. The second method is more concerned with the appropriateness for embedded digital imaging applications. We approximate the distribution of correction factors by a single correction function, which is in the form of a 2-D hypercosine function. Only five parameters are needed to describe an underlying input intensity distribution and are estimated by nonlinear model fitting against measured input illumination data. We show the performance of the proposed methods by experimental results using synthetic and real images. © 2004 IEEE.
KSP 제안 키워드
Digital camera, Digital imaging(CCD camera), Intensity distributions, Nonlinear model, Position-dependent, correction factor, correction function, first method, image noise, imaging applications, light intensity