Naslov
Noise robust local phase coherence based method for image sharpness assesment

Autori
Seršić, Damir ; Sović, Ana

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings Eusipco 2014 / - Lisabon, 2014, 1-5

Skup
22nd European Signal Processing Conference (EUSIPCO 2014)

Mjesto i datum
Lisabon, Portugal, 01.09.2014. - 05.09.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
complex wavelet transform; local phase coherence; image sharpness assessment; image blur

Sažetak
Image sharpness assessment is a very important issue in image acquisition and processing. Novel approaches in noreference image sharpness assessment methods are based on local phase coherence (LPC), rather than edge or frequency content analysis. It has been shown that the LPC based methods are closer to human observer assessments. In this paper, we propose carefully time-domain designed complex wavelets that provide a good tool for the local phase estimation. Moreover, we take a special care of noise. We apply thresholding in the wavelet domain and merge several estimates to achieve statistical robustness in the presence of noise. A novel, more intuitive sharpness index is proposed, as well.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika, Računarstvo

POVEZANOST RADA