Modified Wiener estimation of diffuse reflectance spectra from RGB values by the synthesis of new colors for tissue measurements
We present a new method for the accurate estimation of diffuse reflectance spectra from RGB values based on Wiener estimation. In the proposed method, a system matrix obtained from the original RGB values is combined with a set of synthetic optical filters to generate another three values corre...
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| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/96316 http://hdl.handle.net/10220/10167 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | We present a new method for the accurate estimation
of diffuse reflectance spectra from RGB values based on
Wiener estimation. In the proposed method, a system matrix
obtained from the original RGB values is combined with a
set of synthetic optical filters to generate another three
values corresponding to new colors. A modified Wiener
matrix can then be created with the original RGB values
and the new color values, which will yield a more accurate
estimation because of the new color information that has
been incorporated. This method was tested on in vivo color
measurements from 200 skin sites in 10 volunteers. The
results show that the proposed method is able to improve
the estimation accuracy significantly compared with the
traditional Wiener estimation method. The fast speed of
this method may enable the estimation of diffuse reflectance
spectra at multiple tissue locations from color images in real
time, which provides a cost-effective alternative to spectral
imaging with the additional advantage of high spectral resolution. |
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