sci.engr.color Google Group

spectral reflectance (VIS and NIR)

gorj...@yahoo.com (Saeideh Gorji) — Sun, 15 Nov. 2009 09:37:45 UT

Hi,
Dear friends, I am looking for a data set of spectal reflectance of
different known polymers and pigments which included both visible and
NIR part of spectrum. Is there any one who knows any downloadable data
set?
Thanks a lot
Saeideh Gorji

Re: How to generate a perceptual 2-dimensional color map...

michael.aupe...@gmail.com (mik) — Tue, 03 Nov. 2009 17:12:01 UT

Thank you
Mik

Re: How to generate a perceptual 2-dimensional color map...

inva...@invalid.invalid (Graeme Gill) — Fri, 30 Okt. 2009 03:42:24 UT

This is a bit misleading. CIELab is recommended compared
to many alternatives that make no attempt to be visually uniform
(ie. XYZ, Yxy, many device spaces etc.).
There are colorspace that are more visually uniform than CIELab,
but they have yet to be as universally embraced, and for many
non-critical purposes CIELab is adequate.

Re: How to generate a perceptual 2-dimensional color map...

hoffm...@fho-emden.de (Gernot Hoffmann) — Tue, 27 Okt. 2009 15:32:51 UT

mik schrieb:
(I've replaced my original message).
Depending on the task, you can take an arbitrary plane in a
rather uniform color space, the Digital Munsell,
[link]
CIELab values for a finite number of patches are given.
A description by functions is not available.

Re: How to generate a perceptual 2-dimensional color map...

michael.aupe...@gmail.com (mik) — Mon, 26 Okt. 2009 08:51:16 UT

Thank you very much for these documents.
Mik

Re: How to generate a perceptual 2-dimensional color map...

dannyr...@softhome.net (Danny) — Sun, 25 Okt. 2009 21:11:51 UT

To project a 3-D space (color) onto a 2-D space (X,Y) can be tricky.
What you need is known as a chromaticity diagram. Such that the
colors are mapped to (u,v) plus an orthogonal luminance axis which is
ignored.
The most visually uniform chromaticity diagram comes from the CIE 1976
(u,v) diagram. For the convenience of displaying the colors, uvL can

~ USB FLASH ~

mitosira...@gmail.com (Fern BENVENUTO) — Fri, 23 Okt. 2009 17:05:31 UT

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~ PRIME MINISTER ~

boykinvasbruce...@gmail.com (Bruce Boykin) — Fri, 23 Okt. 2009 11:34:23 UT

.
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New Book published by Springer

use-google-and-search-my-n...@fer.hr (Mislav Grgic) — Thu, 22 Okt. 2009 10:59:02 UT

We would like to inform you about new book published by Springer:
"Recent Advances in Multimedia Signal Processing and Communications"
Edited by: Mislav Grgic, Kresimir Delac, Mohammed Ghanbari
Publisher: Springer
662 pages, 296 illustrations (171 in color), Hardcover
ISBN 978-3-642-02899-1
[link]

How to generate a perceptual 2-dimensional color map...

michael.aupe...@gmail.com (mik) — Tue, 20 Okt. 2009 16:21:12 UT

Hello,
I want to define a colormap f based on 2 parameters X and Y, such that
when drawing a patch with a color f(x,y), I shall perceptually infer
from that color f(x,y) the values X=x and Y=y for the two parameters.
What could be a colormap perceptually relevant for this task?
I tried using interpolated color map from RGB space such that : f(0,0)

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resourt...@gmail.com (hjjhjh) — Wed, 14 Okt. 2009 15:21:09 UT

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iamgee...@gmail.com (geetanjali anjali) — Sat, 19 Sep. 2009 14:33:50 UT

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Re: tunable filters, portable spectrophotometer

gorj...@yahoo.com (Saeideh Gorji) — Sat, 19 Sep. 2009 03:42:04 UT

Danny
Thanks a lot.

Re: tunable filters, portable spectrophotometer

danny.r...@verizon.net (Danny Rich) — Thu, 17 Sep. 2009 18:42:27 UT

Any filter has an intrinsic f/# below which, its bandpass characteristics
change. What ever optics you place in front of the filter will need to be
matched to that f/# - regardless of the size of the aperture. One way to do
this might be to use a Galelian telescope as a relay lens taking a small

tunable filters, portable spectrophotometer

gorj...@yahoo.com (Saeideh Gorji) — Thu, 17 Sep. 2009 14:02:11 UT

Hi,
I have a question about tunable filters, they have special aperture
size, I want to know if its aperture size is for example 1"; it can
only be used with a camera with the similar or smaller aperture?
Another question, is there any portable spectrophotometer which can
support multi aperture shapes? For instance, it can be used for

sci.engr.color Google Group

spectral reflectance (VIS and NIR)

Re: How to generate a perceptual 2-dimensional color map...

Re: How to generate a perceptual 2-dimensional color map...

Re: How to generate a perceptual 2-dimensional color map...

Re: How to generate a perceptual 2-dimensional color map...

Re: How to generate a perceptual 2-dimensional color map...

~~~~~~~~~~~~~~~ USB FLASH ~~~~~~~~~~~~~~~

~~~~~~~~~~~~~~~ PRIME MINISTER ~~~~~~~~~~~~~~~

New Book published by Springer

How to generate a perceptual 2-dimensional color map...

Very-young-beautiful-hot-girls-photo-ur-site-visit must

vacancy's for science students apply resume

Re: tunable filters, portable spectrophotometer

Re: tunable filters, portable spectrophotometer

tunable filters, portable spectrophotometer

~ USB FLASH ~

~ PRIME MINISTER ~