A gradient based edge sensing scheme for color filter array demosaicking

Author

Da-Cheng Sung ; Hen-Wai Tsao

Author_Institution

Grad. Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2013

fDate

1-4 Oct. 2013

Firstpage

249

Lastpage

252

Abstract

The digital still camera acquires the color data using single sensor in which only one color element can be recorded at each pixel. Efficient demosaicking algorithm is necessary to rebuild the other two missing color elements in each pixel. This paper proposed a gradient based edge sensing algorithm for color filter array interpolation to enhance the edge information and avoid zipper effect. Our method first extracts the gradient in different directions and exploits the gradient edge detection to restore the color channel in detail. Experiment results show that our algorithm performs superiorly in PSNR and visual image quality compared with other algorithms.

Keywords

edge detection; filtering theory; gradient methods; image colour analysis; image reconstruction; PSNR; color channel restoration; color filter array demosaicking; color filter array interpolation; edge information enhancement; gradient based edge sensing scheme; gradient edge detection; visual image quality; zipper effect avoidance; Arrays; Color; Filtering algorithms; Image color analysis; Image edge detection; Interpolation; PSNR; adaptive edge; color filter array; demosaicking; interpolation;

fLanguage

English

Publisher

ieee

Conference_Titel

Consumer Electronics (GCCE), 2013 IEEE 2nd Global Conference on

Conference_Location

Tokyo

Print_ISBN

978-1-4799-0890-5

Type

conf

DOI

10.1109/GCCE.2013.6664815

Filename

6664815