RESTORATION OF ASTRONOMICAL IMAGES BY WAVELET TECHNIQUES
Palavras-chave:
Astronomical images, image restoration, wavelet transform, wavelet shrinkage, filteringResumo
Image restoration, an important application of inverse problem techniques, is relevant for remote
sensing, surveillance and security, medicine, material science, research on biology, entertainment industry, and
more recently for aerial drone autonomous navigation. Our focus is on astronomical images. Indeed, observa-
tional astronomy is fully dependent on image interpretation. Therefore, image restoration techniques applied to
astronomy is a relevant research topic in this field. Here, Several wavelet schemes are applied for astronomical
images restoration, ranging from the orthogonal wavelets, including Haar, Daubechies, and Symlet families, to
biorthogonal wavelets. Different thresholding schemes are assumed to analyze the resulting wavelet decomposi-
tion, assuming as input data RGB images with high noise levels. The results are evaluated by using structural
image similarity as the comparative metric for different schemes to image restoration.
