Baza Publikacji Pracowników Politechniki Lubelskiej

Status:
Autorzy:	Skublewska-Paszkowska Maria
Rok wydania:	2008
Wersja dokumentu:	Drukowana \| Elektroniczna
Język:	angielski
Numer czasopisma:	3B
Wolumen/Tom:	17
Strony:	408 - 412
Impact Factor:	0,963
Efekt badań statutowych	NIE
Materiał konferencyjny:	NIE
Publikacja OA:	NIE
Abstrakty:	angielski
	The perceptual measure Picture Quality Scale (PQS) together with the neural network were implemented to evaluate the local distortions in compressed images. The images were compressed with Daubechies wavelei transforms for degrees: 4.6.8.14, 20 and Embedded Zerotree Wavelet (EZW) coding. The neural network was learnt on the basis of visual evaluarion of a group of observers. For each pair of the original and the compressed images a sliding window of a fixed size was created. For this window the PQS yalue was computed and sayed as a new yalue to the image diat represented the local perceptual distorions. The PQS value was represented by the grey scale in the resultant image.rhe described usage of the PQS network enables the effective assessments based on Mean Opinion Score (MOS) measure so that the local distortions for compressed images can be created without observers.

The usage of perceptual measure Picture Quality Scale with neural network to evaluate local distortions in walvelet compressed images