[argyllcms] Re: how to connect a home made colorimeter to ArgyllCMS?
- From: "Tom" <chiataimakro@xxxxxx>
- To: "argyllcms" <argyllcms@xxxxxxxxxxxxx>
- Date: Wed, 20 Aug 2014 00:24:43 +0800
Gill wrote: >It's quite difficult to transform a colorimetric reading using one
>particular light source (i.e. a white LED) into one for a standard >light
source such as D50 in a way that is independent of the >spectral
characteristics of what you are measuring. Reflective >colorimeters have
traditionally used an incandescent light source, >because it has some
similarity to D50, or can be filtered to be like D50. that's true. the
colorimeter is mainly designed for emissive(display) measurement, with
reflective measurement as an extra option.the colors rendered under a white LED
will not match a D50 source for sure. i read papers about synthesizing D50 and
D65 spectrum with an array of 8-12 LEDs of different wavelengths and types(with
phosphor or not), which can be a good alternative to incandescent lamps. i ll
try to build one later. thanks for the advice!with a white LED the colorimeter
may be used to QC products with the same type of surface material, in a way
where the absolute color of a sample is not important, but the deviations
between samples.>Short answer: you would have to write a driver. There are
numerous examples, >from the simple to complex in the ArgyllCMS spectro/ source
(i.e. ColorHug, >Huey, DTP51, etc). i tried my best to read your source code.
it may take a while for me to figure out what every function does.i will give
it a try on Visual Stuidio 2012. ---------------------------Love you all,Qin
Yongliang
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