Search Results - "Kaarna, A."

A foodborne outbreak due to Cryptosporidium parvum in Helsinki, November 2008 by Pönka, A, Kotilainen, H, Rimhanen-Finne, R, Hokkanen, P, Hänninen, M L, Kaarna, A, Meri, T, Kuusi, M

“…We report the first foodborne outbreak caused by Cryptosporidium parvum in Finland. The outbreak occurred among personnel of the Public Works Department in…”
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Compression of multispectral remote sensing images using clustering and spectral reduction by Kaarna, A., Zemcik, P., Kalviainen, H., Parkkinen, J.

“…Image compression has been one of the main research topics in the field of image processing for a long time. The research usually focuses on compressing images…”
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Compression and classification methods for hyperspectral images by Kaarna, A., Toivanen, P., Keränen, P.

“…In this article we present new lossless compression methods by combining existing methods and compare them using AVIRIS images. These methods include the…”
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Transform based lossy compression of multispectral images by KAARNA, A, PARKKINEN, J

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Improved back end for integer PCA and wavelet transforms for lossless compression of multispectral images by Mielikainen, J., Kaarna, A.

“…Remote sensing produces large amounts of digital data that is collected into databases. Since a variety of applications utilize multispectral data, the data…”
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Integer PCA and wavelet transforms for multispectral image compression by Kaarna, A.

“…Remote sensing produces large amounts or digital data which are collected into databases. Since a variety of applications utilize the multispectral data, the…”
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Companding and PCA compression of spectrum sets by Kaarna, A.

“…Companding is a procedure which can be used to smooth the effects of the fluctuating signal energy. The effect of the compressor in the transmitter is…”
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NURBS representation for sets of spectral signatures by Kaarna, A.

“…In this study we demonstrate the representation of sets of spectral signatures such that the representation is optimal in the user-defined sense. The basis…”
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Multispectral image compression by Kaarna, A., Zemcik, P., Kalviainen, H., Parkkinen, J.

“…Image compression has been one of the mainstream research topics in image processing. The research usually focuses on compressing images that are visible to…”
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Optical implementation of spectral filtering for the enhancement of skin color discrimination by Nishino, Ken, Kaarna, Arto, Miyazawa, Kanae, Oda, Hirofumi, Nakauchi, Shigeki

“…Light reflected from an object contains a range of information about its physical and chemical properties. Changes in the physical properties of an object can…”
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Michromatic scope for enhancement of color difference by Kaarna, Arto, Nishino, Ken, Miyazawa, Kanae, Nakauchi, Shigeki

“…A michromatic (microscope plus chromatic) scope is a device that enhances the color discrimination between two spectral color datasets. Three spectral filters…”
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A FOODBORNE OUTBREAK DUE TO CRYPTOSPORIDIUM PARVUM IN HELSINKI, NOVEMBER 2008 by PÖNKA, A, KOTILAINEN, H, RIMHANEN-FINNE, R, HOKKANEN, P, HÄNNINEN, M. L, KAARNA, A, MERI, T, KUUSI, M

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A hybrid method for short-term electricity consumption prediction by Gao, X. Z., Kaarna, A., Lensu, L., Honkapuro, S.

“…Electricity consumption prediction is an important but demanding issue in the study of power systems. It is difficult for the conventional prediction methods,…”
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Wavelet filter selection in multispectral image compression by Kaarna, A., Parkkinen, J.

“…The problem of selecting an appropriate wavelet filter is always present in the wavelet based compression. Different mother wavelets are characterized by their…”
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Non-negative Matrix Factorization Features from Spectral Signatures of AVIRIS Images by Kaarna, A.

“…In this study we use non-negative matrix factorization (NMF) in deriving feature vectors from a set of spectral signatures. The purpose is to demonstrate the…”
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Comparing Sampling Methods in Faster Computation of Non-Negative Tensor Factorization of Spectral Images by Kaarna, A., Andriyashin, A.

“…Computation of the non-negative tensor factorization of a spectral image is very time-consuming. The computational complexity depends on the number of bases,…”
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Sparse Coded Spatial Features from Spectral Images by Kaarna, A.

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An automatic approach to lossy compression of AVIRIS images by Ponomarenko, N.N., Lukin, V.V., Zriakhov, M.S., Kaarna, A., Astola, J.

“…Lossy compression of AVIRIS hyperspectral images is considered. An automatic approach to selection of compression parameters depending on noise characteristics…”
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Companding of spectra from spectral images for reducing noise from coarse quantization by Kaarna, A.

“…Companding is normally used in communication systems to compensate fluctuating levels in the source power. In this study we apply companding to enhance the…”
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Zero-order entropy in estimating bit allocation for eigenimages in PCA/wavelet compression of spectral images by Kaarna, A.

“…Zero-order entropy has been applied as a basic scheme to the bit allocation among the eigenimages after the PCA transform in the lossy compression of spectral…”
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