Advanced Search
Display options
Filter resources
Text Availability
Article type
Publication date
Species
Language
Sex
Age
Showing 1 to 12 of 16 entries
Sorted by: Best Match Show Resources per page
Regularized learning framework in the estimation of reflectance spectra from camera responses.

Journal of the Optical Society of America. A, Optics, image science, and vision

Heikkinen V, Jetsu T, Parkkinen J, Hauta-Kasari M, Jaaskelainen T, Lee SD.
PMID: 17767236
J Opt Soc Am A Opt Image Sci Vis. 2007 Sep;24(9):2673-83. doi: 10.1364/josaa.24.002673.

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 illuminant-independent reflectance spectra. Simple regularization methods with widely used polynomial modeling provide an efficient approach...

Cite
Heikkinen V, Jetsu T, Parkkinen J, et al. Regularized learning framework in the estimation of reflectance spectra from camera responses. J Opt Soc Am A Opt Image Sci Vis. 2007;24(9):2673-83doi: 10.1364/josaa.24.002673.
Heikkinen, V., Jetsu, T., Parkkinen, J., Hauta-Kasari, M., Jaaskelainen, T., & Lee, S. D. (2007). Regularized learning framework in the estimation of reflectance spectra from camera responses. Journal of the Optical Society of America. A, Optics, image science, and vision, 24(9), 2673-83. https://doi.org/10.1364/josaa.24.002673
Heikkinen, Ville, et al. "Regularized learning framework in the estimation of reflectance spectra from camera responses." Journal of the Optical Society of America. A, Optics, image science, and vision vol. 24,9 (2007): 2673-83. doi: https://doi.org/10.1364/josaa.24.002673
Heikkinen V, Jetsu T, Parkkinen J, Hauta-Kasari M, Jaaskelainen T, Lee SD. Regularized learning framework in the estimation of reflectance spectra from camera responses. J Opt Soc Am A Opt Image Sci Vis. 2007 Sep;24(9):2673-83. doi: 10.1364/josaa.24.002673. PMID: 17767236.
Copy Download .nbib Format: NLM
Optimal sampling of color spectra.

Journal of the Optical Society of America. A, Optics, image science, and vision

Lehtonen J, Parkkinen J, Jaaskelainen T.
PMID: 17106454
J Opt Soc Am A Opt Image Sci Vis. 2006 Dec;23(12):2983-8. doi: 10.1364/josaa.23.002983.

We explain a method for calculating the optimal sampling interval of color spectra. The 1269 measured Munsell matt reflectance spectra set is used as the test set. The effect of light sources on the required sampling interval with different...

Cite
Lehtonen J, Parkkinen J, Jaaskelainen T. Optimal sampling of color spectra. J Opt Soc Am A Opt Image Sci Vis. 2006;23(12):2983-8doi: 10.1364/josaa.23.002983.
Lehtonen, J., Parkkinen, J., & Jaaskelainen, T. (2006). Optimal sampling of color spectra. Journal of the Optical Society of America. A, Optics, image science, and vision, 23(12), 2983-8. https://doi.org/10.1364/josaa.23.002983
Lehtonen, Juha, et al. "Optimal sampling of color spectra." Journal of the Optical Society of America. A, Optics, image science, and vision vol. 23,12 (2006): 2983-8. doi: https://doi.org/10.1364/josaa.23.002983
Lehtonen J, Parkkinen J, Jaaskelainen T. Optimal sampling of color spectra. J Opt Soc Am A Opt Image Sci Vis. 2006 Dec;23(12):2983-8. doi: 10.1364/josaa.23.002983. PMID: 17106454.
Copy Download .nbib Format: NLM
Temporal, Spatial, and Environmental classification of Pine Reflectance Spectra.

Environmental science & technology

Silvennoinen R, Jaaskelainen T, Nygren K, Hiltunen J, Parkkinen J.
PMID: 22276864
Environ Sci Technol. 1995 Jun 01;29(6):1456-9. doi: 10.1021/es00006a005.

No abstract available.

Cite
Silvennoinen R, Jaaskelainen T, Nygren K, et al. Temporal, Spatial, and Environmental classification of Pine Reflectance Spectra. Environ Sci Technol. 1995;29(6):1456-9doi: 10.1021/es00006a005.
Silvennoinen, R., Jaaskelainen, T., Nygren, K., Hiltunen, J., & Parkkinen, J. (1995). Temporal, Spatial, and Environmental classification of Pine Reflectance Spectra. Environmental science & technology, 29(6), 1456-9. https://doi.org/10.1021/es00006a005
Silvennoinen, R, et al. "Temporal, Spatial, and Environmental classification of Pine Reflectance Spectra." Environmental science & technology vol. 29,6 (1995): 1456-9. doi: https://doi.org/10.1021/es00006a005
Silvennoinen R, Jaaskelainen T, Nygren K, Hiltunen J, Parkkinen J. Temporal, Spatial, and Environmental classification of Pine Reflectance Spectra. Environ Sci Technol. 1995 Jun 01;29(6):1456-9. doi: 10.1021/es00006a005. PMID: 22276864.
Copy Download .nbib Format: NLM
Two-wave mixing of phase-modulated beams in GaP under a dc electric field.

Optics letters

Kamshilin AA, Nazhestkina NI, Kobozev OV, Jaaskelainen T.
PMID: 18040374
Opt Lett. 2001 Apr 15;26(8):527-9. doi: 10.1364/ol.26.000527.

Two-wave mixing of phase-modulated light beams in crystals of cubic symmetry is analyzed on the basis of the vectorial theory of light diffraction. We derive an analytical expression for phase-to-intensity transformation in crystals of the 43m point group of...

Cite
Kamshilin AA, Nazhestkina NI, Kobozev OV, et al. Two-wave mixing of phase-modulated beams in GaP under a dc electric field. Opt Lett. 2001;26(8):527-9doi: 10.1364/ol.26.000527.
Kamshilin, A. A., Nazhestkina, N. I., Kobozev, O. V., & Jaaskelainen, T. (2001). Two-wave mixing of phase-modulated beams in GaP under a dc electric field. Optics letters, 26(8), 527-9. https://doi.org/10.1364/ol.26.000527
Kamshilin, A A, et al. "Two-wave mixing of phase-modulated beams in GaP under a dc electric field." Optics letters vol. 26,8 (2001): 527-9. doi: https://doi.org/10.1364/ol.26.000527
Kamshilin AA, Nazhestkina NI, Kobozev OV, Jaaskelainen T. Two-wave mixing of phase-modulated beams in GaP under a dc electric field. Opt Lett. 2001 Apr 15;26(8):527-9. doi: 10.1364/ol.26.000527. PMID: 18040374.
Copy Download .nbib Format: NLM
Diffractive parameric colors.

Journal of the Optical Society of America. A, Optics, image science, and vision

Orava J, Heikkila N, Jaaskelainen T, Parkkinen J.
PMID: 19037379
J Opt Soc Am A Opt Image Sci Vis. 2008 Dec;25(12):2901-7. doi: 10.1364/josaa.25.002901.

A method of producing inkless parameric color pairs is studied. In this method, colors are formed additively using diffraction gratings with differing grating periods as primary colors. Gratings with different grating periods reflect different spectral radiance peaks of a...

Cite
Orava J, Heikkila N, Jaaskelainen T, et al. Diffractive parameric colors. J Opt Soc Am A Opt Image Sci Vis. 2008;25(12):2901-7doi: 10.1364/josaa.25.002901.
Orava, J., Heikkila, N., Jaaskelainen, T., & Parkkinen, J. (2008). Diffractive parameric colors. Journal of the Optical Society of America. A, Optics, image science, and vision, 25(12), 2901-7. https://doi.org/10.1364/josaa.25.002901
Orava, Joni, et al. "Diffractive parameric colors." Journal of the Optical Society of America. A, Optics, image science, and vision vol. 25,12 (2008): 2901-7. doi: https://doi.org/10.1364/josaa.25.002901
Orava J, Heikkila N, Jaaskelainen T, Parkkinen J. Diffractive parameric colors. J Opt Soc Am A Opt Image Sci Vis. 2008 Dec;25(12):2901-7. doi: 10.1364/josaa.25.002901. PMID: 19037379.
Copy Download .nbib Format: NLM
Weighted compression of spectral color information.

Journal of the Optical Society of America. A, Optics, image science, and vision

Laamanen H, Jetsu T, Jaaskelainen T, Parkkinen J.
PMID: 18516149
J Opt Soc Am A Opt Image Sci Vis. 2008 Jun;25(6):1383-8. doi: 10.1364/josaa.25.001383.

Spectral color information is used nowadays in many different applications. Accurate spectral images are usually very large files, but a proper compression method can reduce needed storage space remarkably with a minimum loss of information. In this paper we...

Cite
Laamanen H, Jetsu T, Jaaskelainen T, et al. Weighted compression of spectral color information. J Opt Soc Am A Opt Image Sci Vis. 2008;25(6):1383-8doi: 10.1364/josaa.25.001383.
Laamanen, H., Jetsu, T., Jaaskelainen, T., & Parkkinen, J. (2008). Weighted compression of spectral color information. Journal of the Optical Society of America. A, Optics, image science, and vision, 25(6), 1383-8. https://doi.org/10.1364/josaa.25.001383
Laamanen, Hannu, et al. "Weighted compression of spectral color information." Journal of the Optical Society of America. A, Optics, image science, and vision vol. 25,6 (2008): 1383-8. doi: https://doi.org/10.1364/josaa.25.001383
Laamanen H, Jetsu T, Jaaskelainen T, Parkkinen J. Weighted compression of spectral color information. J Opt Soc Am A Opt Image Sci Vis. 2008 Jun;25(6):1383-8. doi: 10.1364/josaa.25.001383. PMID: 18516149.
Copy Download .nbib Format: NLM
Giant momentary readout produced by switching electric fields during two-wave mixing in sillenites.

Optics letters

Shamonina E, Ringhofer KH, Sturman BI, Kamenov VP, Cedilnik G, Esselbach M, Kiessling A, Kowarschik R, Kamshilin AA, Prokofiev VV, Jaaskelainen T.
PMID: 18091808
Opt Lett. 1998 Sep 15;23(18):1435-7. doi: 10.1364/ol.23.001435.

We show theoretically and experimentally that switching an applied square-wave field produces strong and short pulses of the outgoing signal during two-wave mixing in sillenite crystals. These pulses originate from the strong effect of the field on the optical...

Cite
Shamonina E, Ringhofer KH, Sturman BI, et al. Giant momentary readout produced by switching electric fields during two-wave mixing in sillenites. Opt Lett. 1998;23(18):1435-7doi: 10.1364/ol.23.001435.
Shamonina, E., Ringhofer, K. H., Sturman, B. I., Kamenov, V. P., Cedilnik, G., Esselbach, M., Kiessling, A., Kowarschik, R., Kamshilin, A. A., Prokofiev, V. V., & Jaaskelainen, T. (1998). Giant momentary readout produced by switching electric fields during two-wave mixing in sillenites. Optics letters, 23(18), 1435-7. https://doi.org/10.1364/ol.23.001435
Shamonina, E, et al. "Giant momentary readout produced by switching electric fields during two-wave mixing in sillenites." Optics letters vol. 23,18 (1998): 1435-7. doi: https://doi.org/10.1364/ol.23.001435
Shamonina E, Ringhofer KH, Sturman BI, Kamenov VP, Cedilnik G, Esselbach M, Kiessling A, Kowarschik R, Kamshilin AA, Prokofiev VV, Jaaskelainen T. Giant momentary readout produced by switching electric fields during two-wave mixing in sillenites. Opt Lett. 1998 Sep 15;23(18):1435-7. doi: 10.1364/ol.23.001435. PMID: 18091808.
Copy Download .nbib Format: NLM
Kernel-based spectral color image segmentation.

Journal of the Optical Society of America. A, Optics, image science, and vision

Li H, Bochko V, Jaaskelainen T, Parkkinen J, Shen IF.
PMID: 18978860
J Opt Soc Am A Opt Image Sci Vis. 2008 Nov;25(11):2805-16. doi: 10.1364/josaa.25.002805.

In this work, we propose a new algorithm for spectral color image segmentation based on the use of a kernel matrix. A cost function for spectral kernel clustering is introduced to measure the correlation between clusters. An efficient multiscale...

Cite
Li H, Bochko V, Jaaskelainen T, et al. Kernel-based spectral color image segmentation. J Opt Soc Am A Opt Image Sci Vis. 2008;25(11):2805-16doi: 10.1364/josaa.25.002805.
Li, H., Bochko, V., Jaaskelainen, T., Parkkinen, J., & Shen, I. F. (2008). Kernel-based spectral color image segmentation. Journal of the Optical Society of America. A, Optics, image science, and vision, 25(11), 2805-16. https://doi.org/10.1364/josaa.25.002805
Li, Hongyu, et al. "Kernel-based spectral color image segmentation." Journal of the Optical Society of America. A, Optics, image science, and vision vol. 25,11 (2008): 2805-16. doi: https://doi.org/10.1364/josaa.25.002805
Li H, Bochko V, Jaaskelainen T, Parkkinen J, Shen IF. Kernel-based spectral color image segmentation. J Opt Soc Am A Opt Image Sci Vis. 2008 Nov;25(11):2805-16. doi: 10.1364/josaa.25.002805. PMID: 18978860.
Copy Download .nbib Format: NLM
Color representation using statistical pattern recognition.

Applied optics

Parkkinen J, Jaaskelainen T.
PMID: 20490216
Appl Opt. 1987 Oct 01;26(19):4240-5. doi: 10.1364/AO.26.004240.

A statistical pattern recognition method, the subspace method, closely related to the principal component analysis was used in color recognition. It is shown that color spectra can be accurately reconstructed using a few principal spectra. Further, it is shown...

Cite
Parkkinen J, Jaaskelainen T. Color representation using statistical pattern recognition. Appl Opt. 1987;26(19):4240-5doi: 10.1364/AO.26.004240.
Parkkinen, J., & Jaaskelainen, T. (1987). Color representation using statistical pattern recognition. Applied optics, 26(19), 4240-5. https://doi.org/10.1364/AO.26.004240
Parkkinen, J, and Jaaskelainen, T. "Color representation using statistical pattern recognition." Applied optics vol. 26,19 (1987): 4240-5. doi: https://doi.org/10.1364/AO.26.004240
Parkkinen J, Jaaskelainen T. Color representation using statistical pattern recognition. Appl Opt. 1987 Oct 01;26(19):4240-5. doi: 10.1364/AO.26.004240. PMID: 20490216.
Copy Download .nbib Format: NLM
Enhanced optical absorptance of metals using interferometric femtosecond ablation.

Optics express

Paivasaari K, Kaakkunen JJ, Kuittinen M, Jaaskelainen T.
PMID: 19550654
Opt Express. 2007 Oct 17;15(21):13838-43. doi: 10.1364/oe.15.013838.

The enhanced optical absorptance in metals was recently demonstrated using femtosecond laser-induced surface structuring. This structuring was obtained by simply focusing the light to the sample surface. Here we demonstrate more efficient absorptance enhancement using interferometric ablation. This interferometric...

Cite
Paivasaari K, Kaakkunen JJ, Kuittinen M, et al. Enhanced optical absorptance of metals using interferometric femtosecond ablation. Opt Express. 2007;15(21):13838-43doi: 10.1364/oe.15.013838.
Paivasaari, K., Kaakkunen, J. J., Kuittinen, M., & Jaaskelainen, T. (2007). Enhanced optical absorptance of metals using interferometric femtosecond ablation. Optics express, 15(21), 13838-43. https://doi.org/10.1364/oe.15.013838
Paivasaari, K, et al. "Enhanced optical absorptance of metals using interferometric femtosecond ablation." Optics express vol. 15,21 (2007): 13838-43. doi: https://doi.org/10.1364/oe.15.013838
Paivasaari K, Kaakkunen JJ, Kuittinen M, Jaaskelainen T. Enhanced optical absorptance of metals using interferometric femtosecond ablation. Opt Express. 2007 Oct 17;15(21):13838-43. doi: 10.1364/oe.15.013838. PMID: 19550654.
Copy Download .nbib Format: NLM
Polarization properties of fanning light in fiberlike bismuth titanium oxide crystals.

Optics letters

Raita E, Kamshilin AA, Jaaskelainen T.
PMID: 19881838
Opt Lett. 1996 Dec 01;21(23):1897-9. doi: 10.1364/ol.21.001897.

We demonstrate that the fanning light emerging from an optically active fiberlike bismuth titanium oxide (Bi(12)TiO(20)) crystal is linearly polarized either parallel to the applied electric-field vector or perpendicular to it, independently of the external ac electric field, the...

Cite
Raita E, Kamshilin AA, Jaaskelainen T. Polarization properties of fanning light in fiberlike bismuth titanium oxide crystals. Opt Lett. 1996;21(23):1897-9doi: 10.1364/ol.21.001897.
Raita, E., Kamshilin, A. A., & Jaaskelainen, T. (1996). Polarization properties of fanning light in fiberlike bismuth titanium oxide crystals. Optics letters, 21(23), 1897-9. https://doi.org/10.1364/ol.21.001897
Raita, E, et al. "Polarization properties of fanning light in fiberlike bismuth titanium oxide crystals." Optics letters vol. 21,23 (1996): 1897-9. doi: https://doi.org/10.1364/ol.21.001897
Raita E, Kamshilin AA, Jaaskelainen T. Polarization properties of fanning light in fiberlike bismuth titanium oxide crystals. Opt Lett. 1996 Dec 01;21(23):1897-9. doi: 10.1364/ol.21.001897. PMID: 19881838.
Copy Download .nbib Format: NLM
Retrotransposon BARE-1: expression of encoded proteins and formation of virus-like particles in barley cells.

The Plant journal : for cell and molecular biology

Jaaskelainen M, Mykkanen AH, Arna T, Vicient CM, Suoniemi A, Kalendar R, Savilahti H, Schulman AH.
PMID: 10607294
Plant J. 1999 Nov;20(4):413-22. doi: 10.1046/j.1365-313x.1999.00616.x.

Retrotransposons are ubiquitous and major components of plant genomes, and are characteristically retroviral-like in their genomic structure and in the major proteins encoded. Nevertheless, few have been directly demonstrated to be transcribed or reverse transcribed. The BARE-1 retrotransposon family...

Cite
Jaaskelainen M, Mykkanen AH, Arna T, et al. Retrotransposon BARE-1: expression of encoded proteins and formation of virus-like particles in barley cells. Plant J. 1999;20(4):413-22doi: 10.1046/j.1365-313x.1999.00616.x.
Jaaskelainen, M., Mykkanen, A. H., Arna, T., Vicient, C. M., Suoniemi, A., Kalendar, R., Savilahti, H., & Schulman, A. H. (1999). Retrotransposon BARE-1: expression of encoded proteins and formation of virus-like particles in barley cells. The Plant journal : for cell and molecular biology, 20(4), 413-22. https://doi.org/10.1046/j.1365-313x.1999.00616.x
Jaaskelainen, et al. "Retrotransposon BARE-1: expression of encoded proteins and formation of virus-like particles in barley cells." The Plant journal : for cell and molecular biology vol. 20,4 (1999): 413-22. doi: https://doi.org/10.1046/j.1365-313x.1999.00616.x
Jaaskelainen M, Mykkanen AH, Arna T, Vicient CM, Suoniemi A, Kalendar R, Savilahti H, Schulman AH. Retrotransposon BARE-1: expression of encoded proteins and formation of virus-like particles in barley cells. Plant J. 1999 Nov;20(4):413-22. doi: 10.1046/j.1365-313x.1999.00616.x. PMID: 10607294.
Copy Download .nbib Format: NLM
Showing 1 to 12 of 16 entries