3 February 2014 Moire reduction using inflection point in frequency domain
Author Affiliations +
Digital still cameras generally use an optical low-pass filter(OLPF) to enhance the image quality by removing high spatial frequencies causing aliasing. While eliminating the OLPF can save manufacturing costs, images captured without using an OLPF include moiré in the high spatial frequency region of the image. Therefore, to reduce the presence of moiré in a captured image, this paper presents a moiré reduction method without the use of an OLPF. First, the spatial frequency response(SFR) of the camera is analyzed and moiré regions detected using patterns related to the SFR of the camera. Using these detected regions, the moiré components represented by the inflection point between the high frequency and DC components in the frequency domain are selected and then removed. Experimental results confirm that the proposed method can achieve moiré reduction while preserving detail information.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dae-Chul Kim, Dae-Chul Kim, Wang-Jun Kyung, Wang-Jun Kyung, Bong-Seok Choi, Bong-Seok Choi, Yeong-Ho Ha, Yeong-Ho Ha, "Moire reduction using inflection point in frequency domain", Proc. SPIE 9015, Color Imaging XIX: Displaying, Processing, Hardcopy, and Applications, 90150J (3 February 2014); doi: 10.1117/12.2040860; https://doi.org/10.1117/12.2040860


Evolution of slanted edge gradient SFR measurement
Proceedings of SPIE (February 02 2014)
Optics for digital photography
Proceedings of SPIE (November 27 2007)
How small should pixel size be?
Proceedings of SPIE (May 14 2000)
Optical systems for high-resolution digital still cameras
Proceedings of SPIE (August 26 1999)
Multifocal ophthalmic lens testing
Proceedings of SPIE (May 25 1994)

Back to Top