User profiles for Timo Jaaskelainen

Timo Jääskeläinen

Professor
Verified email at uef.fi
Cited by 3651

Characteristic spectra of Munsell colors

JPS Parkkinen, J Hallikainen, T Jaaskelainen - JOSA A, 1989 - opg.optica.org
The 1257 reflectance spectra of the chips in the Munsell Book of Color—Matte Finish
Collection (Munsell Color, Baltimore, Md., 1976) were measured with a rapid acousto-optic …

Simulated multispectral imagery for tree species classification using support vector machines

…, J Parkkinen, I Korpela, T Jaaskelainen - … on Geoscience and …, 2009 - ieeexplore.ieee.org
The information content of remotely sensed data depends primarily on the spatial and spectral
properties of the imaging device. This paper focuses on the classification performance of …

Databases for spectral color science

…, J Parkkinen, T Jääskeläinen - Color Research & …, 2006 - Wiley Online Library
In color science, spectral representation and analysis of colors have become a common
approach to study color‐related problems, eg, accurate industrial color measurement or …

Regularized learning framework in the estimation of reflectance spectra from camera responses

…, T Jetsu, J Parkkinen, M Hauta-Kasari, T Jaaskelainen… - JOSA A, 2007 - opg.optica.org
For digital cameras, device-dependent pixel values describe the camera's response to the
incoming spectrum of light. We convert device-dependent RGB values to device- and …

Replication of sub‐micron features using amorphous thermoplastics

…, P Pääkkönen, T Jääskeläinen… - Polymer Engineering …, 2002 - Wiley Online Library
A comprehensive experimental study was carried out to replicate sub‐micron features using
the injection molding technique. For the experiments, five different plastic materials were …

Evaluation and unification of some methods for estimating reflectance spectra from RGB images

…, T Jetsu, J Parkkinen, M Hauta-Kasari, T Jääskeläinen - JOSA A, 2008 - opg.optica.org
The problem of estimating spectral reflectances from the responses of a digital camera has
received considerable attention recently. This problem can be cast as a regularized …

Unsupervised filtering of color spectra

R Lenz, M Österberg, J Hiltunen, T Jaaskelainen… - JOSA A, 1996 - opg.optica.org
We describe a class of unsupervised systems that extract features from databases of
reflectance spectra that sample color space in a way that reflects the properties of human color …

Color sensitive retina based on bacteriorhodopsin

…, P Silfsten, S Parkkinen, J Parkkinen, T Jaaskelainen - Biosystems, 2000 - Elsevier
Bacteriorhodopsin (BR), a membrane protein of a microorganism Halobacterium salinarium
has been studied since the 80’s as a potential material for information technology. The …

Classification of the reflectance spectra of pine, spruce, and birch

T Jaaskelainen, R Silvennoinen, J Hiltunen… - Applied Optics, 1994 - opg.optica.org
Statistical pattern-recognition methods are applied to the classification of the reflectance
spectra of growing trees (Scots pine, Norway spruce, and birch). We show by using large …

Color errors of digital cameras

J Orava, T Jaaskelainen… - Color Research & …, 2004 - Wiley Online Library
The mean color errors of a high‐quality digital camera are defined in CIELAB and CIEDE2000
ΔE units by using 16 ceramic color samples, whose accurate CIELAB values have been …