Abstract
Recently, multispectral images have been utilized for high fidelity color reproduction through visual telecommunication systems and its compression schemes have been required. However multispectral image coding considering color degradation has not been established. This article presents a comparison of four spectral transforms presented before to find out which transform is more suitable to a spectral decorrelation scheme in transform coding of multispectral images. Transforms dealt with in this paper are Karhunen-Loeve transform (KLT), weighted KLT (WKLT), one mode analysis (OMA) and a transform realizing compatibility to the conventional color systems, latter three of which are designed to represent spectral reflectance functions with small number of coefficients having small colorimetric errors. Through the theoretical and experimental comparisons, it is found that WKLT and OMA reduced colorimetric error compared to the others, where OMA is suitable when the rendering illuminations in the color reproduction can be assumed in advance and WKLT is applicable to other situations.
| Original language | English |
|---|---|
| Pages (from-to) | 76-81 |
| Number of pages | 6 |
| Journal | Optical Review |
| Volume | 11 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2004 Mar 1 |
| Externally published | Yes |
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Keywords
- Color reproduction
- Decorrelation
- KLT
- Multispectral image
- Spectral transform
- Transform coding
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Comparative evaluation of spectral transforms for multispectral image coding in terms of colnr degradation. / Murakami, Yuri; Manabe, Hiroyuki; Obi, Takashi; Yamaguchi, Masahiro; Ohyama, Nagaaki.
In: Optical Review, Vol. 11, No. 2, 01.03.2004, p. 76-81.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Comparative evaluation of spectral transforms for multispectral image coding in terms of colnr degradation
AU - Murakami, Yuri
AU - Manabe, Hiroyuki
AU - Obi, Takashi
AU - Yamaguchi, Masahiro
AU - Ohyama, Nagaaki
PY - 2004/3/1
Y1 - 2004/3/1
N2 - Recently, multispectral images have been utilized for high fidelity color reproduction through visual telecommunication systems and its compression schemes have been required. However multispectral image coding considering color degradation has not been established. This article presents a comparison of four spectral transforms presented before to find out which transform is more suitable to a spectral decorrelation scheme in transform coding of multispectral images. Transforms dealt with in this paper are Karhunen-Loeve transform (KLT), weighted KLT (WKLT), one mode analysis (OMA) and a transform realizing compatibility to the conventional color systems, latter three of which are designed to represent spectral reflectance functions with small number of coefficients having small colorimetric errors. Through the theoretical and experimental comparisons, it is found that WKLT and OMA reduced colorimetric error compared to the others, where OMA is suitable when the rendering illuminations in the color reproduction can be assumed in advance and WKLT is applicable to other situations.
AB - Recently, multispectral images have been utilized for high fidelity color reproduction through visual telecommunication systems and its compression schemes have been required. However multispectral image coding considering color degradation has not been established. This article presents a comparison of four spectral transforms presented before to find out which transform is more suitable to a spectral decorrelation scheme in transform coding of multispectral images. Transforms dealt with in this paper are Karhunen-Loeve transform (KLT), weighted KLT (WKLT), one mode analysis (OMA) and a transform realizing compatibility to the conventional color systems, latter three of which are designed to represent spectral reflectance functions with small number of coefficients having small colorimetric errors. Through the theoretical and experimental comparisons, it is found that WKLT and OMA reduced colorimetric error compared to the others, where OMA is suitable when the rendering illuminations in the color reproduction can be assumed in advance and WKLT is applicable to other situations.
KW - Color reproduction
KW - Decorrelation
KW - KLT
KW - Multispectral image
KW - Spectral transform
KW - Transform coding
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U2 - 10.1007/s10043-004-0076-5
DO - 10.1007/s10043-004-0076-5
M3 - Article
VL - 11
SP - 76
EP - 81
JO - Optical Review
JF - Optical Review
SN - 1340-6000
IS - 2
ER -