如何从图像中找到CIELAB的价值? [英] How to find CIELAB value from image?

问题描述

你好

我有300 * 300像素的图像.我正在从光谱相机上获得此图像.
我想从图像中找到CIELAB值(* L * a * b).
我想将图像像素映射为400至700纳米/波长图.
请建议如何从图像中获取RGB值以及如何将其放在
上 CIELAB方程.或建议实现此目标的正确方法.

CIE L * a * b *(CIELAB)是国际照明委员会(Internationale d''Eclairage委员会，因此为其CIE缩写)所指定的最完整的色彩空间.它描述了人眼可见的所有颜色，并被创建为与设备无关的模型，以用作参考

谢谢
Semaphore

Hello

I have an image with 300*300 pixels. I am getting this image from spectral camera.
I want find CIELAB value (*L *a *b) from images.
I want to map the image pixel in 400 to 700 nanometer/Wave length graph.
Please suggest how to get RGB value from image and how put this on
CIELAB equation. Or Suggest right way to achieve this thing.

CIE L*a*b* (CIELAB) is the most complete color space specified by the International Commission on Illumination (Commission Internationale d''Eclairage, hence its CIE initialism). It describes all the colors visible to the human eye and was created to serve as a device independent model to be used as a reference

Thanks
Semaphore

推荐答案

如果您有光谱数据，则可以通过应用标准颜色匹配功能来查找CIE XYZ值.参见例如 http://en.wikipedia.org/wiki/CIE_1931_color_space#Color_matching_functions [ http://www.marcelpatek.com/color.htm [ ^ ]
XYZ可以轻松转换为L * a * b *: http://en .wikipedia.org/wiki/Lab_color_space#CIE_XYZ_to_CIE_L.2Aa.2Ab.2A_.28CIELAB.29_and_CIELAB_to_CIE_XYZ_convers [

If you have spectral data then you start by finding the CIE XYZ values by applying the standard color matching functions. See e.g. http://en.wikipedia.org/wiki/CIE_1931_color_space#Color_matching_functions[^] and http://www.marcelpatek.com/color.htm[^]
XYZ can easily be converted to L*a*b*: http://en.wikipedia.org/wiki/Lab_color_space#CIE_XYZ_to_CIE_L.2Aa.2Ab.2A_.28CIELAB.29_and_CIELAB_to_CIE_XYZ_convers[^]
If you want RGB values, you must first specify which RGB space you want. i.e. specify the chromaticies of the primaries, the white point and the gamma value.

Hello markkuk



我阅读了您的链接，但找不到正确的XYZ查找方法.
在我的情况下，这是用D65日光照明的相机生成的彩色图像.我想使用
查找该光谱图像的XYZ值. 三刺激值.

Hello markkuk



I read your link but i couldn''t find the right way for find XYZ.
Here in my case The color image produced by a camera with D65 day light illumination.I wants find XYZ value of this spectrum image with use of the
tristimulus value.
http://www.google.co.in/search?hl=en&client=firefox-a&hs=Wv&rls=org.mozilla%3Aen-US%3Aofficial&q=tristimulus+values+xls&oq=tristimulus+values+xls&aq=f&aqi=&aql=&gs_sm=e&gs_upl=6573l9068l0l10355l4l4l0l0l0l0l211l740l0.2.2l4l0[^]

Really appreciate to you ,Please give any suggestion.

Thanks

这篇关于如何从图像中找到CIELAB的价值?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！