@article{ART003258804},
author={Jiyun Byun and Hyojin Lee and Hongrae Lee},
title={Adaptive Search Patch Selection Preprocessing in NLM Filtering Based on DCT and FFT Frequency Analysis},
journal={Journal of The Korea Society of Computer and Information},
issn={1598-849X},
year={2025},
volume={30},
number={10},
pages={113-120}
TY - JOUR
AU - Jiyun Byun
AU - Hyojin Lee
AU - Hongrae Lee
TI - Adaptive Search Patch Selection Preprocessing in NLM Filtering Based on DCT and FFT Frequency Analysis
JO - Journal of The Korea Society of Computer and Information
PY - 2025
VL - 30
IS - 10
PB - The Korean Society Of Computer And Information
SP - 113
EP - 120
SN - 1598-849X
AB - With the increasing use of visual media, the importance of image processing has grown, and effective denoising techniques are essential as noise directly affects image analysis. The Non-Local Means (NLM) filter, which removes noise by searching for similar regions, is widely used but limited because a fixed search patch size does not account for regional characteristics. This paper proposes a preprocessing method that transforms images into the frequency domain and adaptively adjusts the search patch size of the NLM filter according to frequency-based region separation. When applied to the NLM filter, the proposed preprocessing technique improved the PSNR by an average of 2.50 dB and up to 8.24 dB, confirming its effectiveness in enhancing denoising performance.
KW - Preprocessing;Discrete Cosine Transform;Fast Fourier Transform;Non-Local Means;;Image Denoising
DO -
UR -
ER -
Jiyun Byun, Hyojin Lee and Hongrae Lee. (2025). Adaptive Search Patch Selection Preprocessing in NLM Filtering Based on DCT and FFT Frequency Analysis. Journal of The Korea Society of Computer and Information, 30(10), 113-120.
Jiyun Byun, Hyojin Lee and Hongrae Lee. 2025, "Adaptive Search Patch Selection Preprocessing in NLM Filtering Based on DCT and FFT Frequency Analysis", Journal of The Korea Society of Computer and Information, vol.30, no.10 pp.113-120.
Jiyun Byun, Hyojin Lee, Hongrae Lee "Adaptive Search Patch Selection Preprocessing in NLM Filtering Based on DCT and FFT Frequency Analysis" Journal of The Korea Society of Computer and Information 30.10 pp.113-120 (2025) : 113.
Jiyun Byun, Hyojin Lee, Hongrae Lee. Adaptive Search Patch Selection Preprocessing in NLM Filtering Based on DCT and FFT Frequency Analysis. 2025; 30(10), 113-120.
Jiyun Byun, Hyojin Lee and Hongrae Lee. "Adaptive Search Patch Selection Preprocessing in NLM Filtering Based on DCT and FFT Frequency Analysis" Journal of The Korea Society of Computer and Information 30, no.10 (2025) : 113-120.
Jiyun Byun; Hyojin Lee; Hongrae Lee. Adaptive Search Patch Selection Preprocessing in NLM Filtering Based on DCT and FFT Frequency Analysis. Journal of The Korea Society of Computer and Information, 30(10), 113-120.
Jiyun Byun; Hyojin Lee; Hongrae Lee. Adaptive Search Patch Selection Preprocessing in NLM Filtering Based on DCT and FFT Frequency Analysis. Journal of The Korea Society of Computer and Information. 2025; 30(10) 113-120.
Jiyun Byun, Hyojin Lee, Hongrae Lee. Adaptive Search Patch Selection Preprocessing in NLM Filtering Based on DCT and FFT Frequency Analysis. 2025; 30(10), 113-120.
Jiyun Byun, Hyojin Lee and Hongrae Lee. "Adaptive Search Patch Selection Preprocessing in NLM Filtering Based on DCT and FFT Frequency Analysis" Journal of The Korea Society of Computer and Information 30, no.10 (2025) : 113-120.
