Multispectral image compression using the wavelet transform

Multispectral images contain information from several spectral wavelengths and currently multispectral images are widely used in remote sensing and they are becoming more common in the field of computer vision and in industrial applications. Typically, one multispectral image in remote sensing may occupy hundreds of megabytes of disk space and several this kind of images may be received from a single measurement. This study considers the compression of multispectral images. The lossy compression is based on the wavelet transform and we compare the suitability of different waveletfilters for the compression. A method for selecting a wavelet filter for the compression and reconstruction of multispectral images is developed. The performance of the multidimensional wavelet transform based compression is compared to other compression methods like PCA, ICA, SPIHT, and DCT/JPEG. The quality of the compression and reconstruction is measured by quantitative measures like signal-to-noise ratio. In addition, we have developed a qualitative measure, which combines the information from the spatial and spectral dimensions of a multispectral image and which also accounts for the visual quality of the bands from the multispectral images.

Sångstycken ur Kung Carls jagt Duettino, Kuplett, Duett : musik af F. Pacius; text af Z. Topelius - [Pärmen]

Helsingfors : Wasenius & Co. [1853]

Sagor : af Z. Topelius - [Bilder] - Första samlingen (0001)

1 Helsingfors : A. W. Gröndahl 1847

Vid Z. Topelius jordfästning (en gammel koralmelodi)

Soitinnus: sekakuoro.

Lukukirja alimmaisille oppilaitoksille Suomessa : 2 jakso : Maamme kirja : Z. Topeliusʼelta. Suomentanut Joh. Bäckwall.

Translated into Finnish by Joh. Bäckwall.

Matkustus Suomessa. : Ensimmäinen jakso. ... : Selitykset Z. Topeliusʼen kirjoittamat.

Engraved illustrations are based on the original oil paintings of several Finnish artists: A. v. Becker, A. Edelfelt, R. W. Ekman, W. Holmberg, K. E. Jansson, O. Kleineh, J. Knutson, B. Lindholm, H. Munsterhjelm och B. Reinhold.

En resa i Finland. : Första serien. ... : Text af Z. Topelius.

Engraved illustrations are based on the original oil paintings of several Finnish artists: A. v. Becker, A. Edelfelt, R. W. Ekman, W. Holmberg, K. E. Jansson, O. Kleineh, J. Knutson, B. Lindholm, H. Munsterhjelm och B. Reinhold.

Matkahavaintoja puoli vuosisataa sitten : Z. Topelius. ; [suom. Wihtori Peltonen].

Translated into Finnish by Wihtori Peltonen.

Luonnon-kirja ala-alkeiskouluin tarpeeksi : Z. Topeliukselta.

Fourth revised edition.

Finland framstäldt i teckningar. : Texten af Z. Topelius. Plancherna från Adler & Dietz i Dresden.

Lithographs from: Johan Knutson, Magnus v. Wright, Lennart Forstén, Pehr Adolf Kruskopf, F. J. Westerling, Adolf Wilhelm Lindeström, and J. Boström, and two lithographs without the artistʼs name.

Libri Armeniaci Bibliothecae Universitatis Helsingiensis: catalogum ordine litterarum, II [M-Z]

Supplementum-osassa paljon tyhjiä välilehtiä.

Willem Jansz. tot den goetwilligen leser in dese pascaarte (goetwilligen aenschouwer) hebdij alle de zeecusten van geheel Europa, seer perfectelijck afgeteeckent door Cornelis Doeds Z. van Edam, op hor rechte streckingen ende ware hoechten, nijtgenomen alleenlijck de Middelantsche Zee ..

Nimeke- ja tekijätiedot nimiönkehyksissä