Correction of axial and lateral chromatic aberration with false color filtering

Joonyoung Chang, Hee Kang, Moon Gi Kang

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In this paper, we propose a chromatic aberration (CA) correction algorithm based on a false color filtering technique. In general, CA produces color distortions called color fringes near the contrasting edges of captured images, and these distortions cause false color artifacts. In the proposed method, a false color filtering technique is used to filter out the false color components from the chroma-signals of the input image. The filtering process is performed with the adaptive weights obtained from both the gradient and color differences, and the weights are designed to reduce the various types of color fringes regardless of the colors of the artifacts. Moreover, as preprocessors of the filtering process, a transient improvement (TI) technique is applied to enhance the slow transitions of the red and blue channels that are blurred by the CA. The TI process improves the filtering performance by narrowing the false color regions before the filtering process when severe color fringes (typically purple fringes) occur widely. Last, the CA-corrected chroma-signal is combined with the TI chroma-signal to avoid incorrect color adjustment. The experimental results show that the proposed method substantially reduces the CA artifacts and provides natural-looking replacement colors, while it avoids incorrect color adjustment.

Original languageEnglish
Article number6357254
Pages (from-to)1186-1198
Number of pages13
JournalIEEE Transactions on Image Processing
Volume22
Issue number3
DOIs
Publication statusPublished - 2013 Feb 11

Fingerprint

Aberrations
Color

All Science Journal Classification (ASJC) codes

  • Software
  • Computer Graphics and Computer-Aided Design

Cite this

@article{aad16b8b2b9447b0970d17a0fd3f0130,
title = "Correction of axial and lateral chromatic aberration with false color filtering",
abstract = "In this paper, we propose a chromatic aberration (CA) correction algorithm based on a false color filtering technique. In general, CA produces color distortions called color fringes near the contrasting edges of captured images, and these distortions cause false color artifacts. In the proposed method, a false color filtering technique is used to filter out the false color components from the chroma-signals of the input image. The filtering process is performed with the adaptive weights obtained from both the gradient and color differences, and the weights are designed to reduce the various types of color fringes regardless of the colors of the artifacts. Moreover, as preprocessors of the filtering process, a transient improvement (TI) technique is applied to enhance the slow transitions of the red and blue channels that are blurred by the CA. The TI process improves the filtering performance by narrowing the false color regions before the filtering process when severe color fringes (typically purple fringes) occur widely. Last, the CA-corrected chroma-signal is combined with the TI chroma-signal to avoid incorrect color adjustment. The experimental results show that the proposed method substantially reduces the CA artifacts and provides natural-looking replacement colors, while it avoids incorrect color adjustment.",
author = "Joonyoung Chang and Hee Kang and Kang, {Moon Gi}",
year = "2013",
month = "2",
day = "11",
doi = "10.1109/TIP.2012.2228489",
language = "English",
volume = "22",
pages = "1186--1198",
journal = "IEEE Transactions on Image Processing",
issn = "1057-7149",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3",

}

Correction of axial and lateral chromatic aberration with false color filtering. / Chang, Joonyoung; Kang, Hee; Kang, Moon Gi.

In: IEEE Transactions on Image Processing, Vol. 22, No. 3, 6357254, 11.02.2013, p. 1186-1198.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Correction of axial and lateral chromatic aberration with false color filtering

AU - Chang, Joonyoung

AU - Kang, Hee

AU - Kang, Moon Gi

PY - 2013/2/11

Y1 - 2013/2/11

N2 - In this paper, we propose a chromatic aberration (CA) correction algorithm based on a false color filtering technique. In general, CA produces color distortions called color fringes near the contrasting edges of captured images, and these distortions cause false color artifacts. In the proposed method, a false color filtering technique is used to filter out the false color components from the chroma-signals of the input image. The filtering process is performed with the adaptive weights obtained from both the gradient and color differences, and the weights are designed to reduce the various types of color fringes regardless of the colors of the artifacts. Moreover, as preprocessors of the filtering process, a transient improvement (TI) technique is applied to enhance the slow transitions of the red and blue channels that are blurred by the CA. The TI process improves the filtering performance by narrowing the false color regions before the filtering process when severe color fringes (typically purple fringes) occur widely. Last, the CA-corrected chroma-signal is combined with the TI chroma-signal to avoid incorrect color adjustment. The experimental results show that the proposed method substantially reduces the CA artifacts and provides natural-looking replacement colors, while it avoids incorrect color adjustment.

AB - In this paper, we propose a chromatic aberration (CA) correction algorithm based on a false color filtering technique. In general, CA produces color distortions called color fringes near the contrasting edges of captured images, and these distortions cause false color artifacts. In the proposed method, a false color filtering technique is used to filter out the false color components from the chroma-signals of the input image. The filtering process is performed with the adaptive weights obtained from both the gradient and color differences, and the weights are designed to reduce the various types of color fringes regardless of the colors of the artifacts. Moreover, as preprocessors of the filtering process, a transient improvement (TI) technique is applied to enhance the slow transitions of the red and blue channels that are blurred by the CA. The TI process improves the filtering performance by narrowing the false color regions before the filtering process when severe color fringes (typically purple fringes) occur widely. Last, the CA-corrected chroma-signal is combined with the TI chroma-signal to avoid incorrect color adjustment. The experimental results show that the proposed method substantially reduces the CA artifacts and provides natural-looking replacement colors, while it avoids incorrect color adjustment.

UR - http://www.scopus.com/inward/record.url?scp=84873394481&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84873394481&partnerID=8YFLogxK

U2 - 10.1109/TIP.2012.2228489

DO - 10.1109/TIP.2012.2228489

M3 - Article

C2 - 23192553

AN - SCOPUS:84873394481

VL - 22

SP - 1186

EP - 1198

JO - IEEE Transactions on Image Processing

JF - IEEE Transactions on Image Processing

SN - 1057-7149

IS - 3

M1 - 6357254

ER -