![]() ![]() Also due to cost constraints, the physical filters used in these instruments are not a perfect match to the CIE Standard Observer weightings, and if nothing were done about it, this would result in large measurement errors. ![]() In theory it is also possible to make a Colorimeter that cheaply captures more light by using larger sensors, but this possibility is rarely exploited by low cost instruments. The main advantage of a Colorimeter is its simplicity, which results in a lower cost instrument. A Colorimeter uses physical filters that approximate the Standard Observer weighting curves to filter the captured light onto three sensors, the sensor values then being measured, and then multiplied by a 3x3 calibration matrix to arrive at the CIE XYZ tri-stimulus values. Because a Spectrometer computes the Standard Observer weightings in software, the accuracy of the curves is nearly perfect, the primary errors being due to wavelength calibration errors, spectrum calibration errors, and the quantised nature of the discrete wavelength bands. A spectrometer breaks the captured light up into a narrow series of wavelengths, measures the response at each of the wavelengths, and then weights and sums each wavelength response by the Standard Observer weighting curves, to arrive at the CIE XYZ tri-stimulus values. What's the difference between a Colorimeter and a Spectrometer ?Ĭolorimeters and Spectrometers both have the same aim: to measure tri-stimulus color values, but they go about this in two quite different ways. Why is this, and what can be done about it ? With the introduction of more wide color gamut displays, many people are finding that their Colorimeter instruments don't work so well on them. I got around that exact problem by getting a ColorMunki which is a true spectrometer along w/ BasicColor sw which can do what SpectraView sw does to control the display. Good question and I'm hoping AndrewR will answer but in the meantime, I found this item but I'm just not sure what the heck it means ) ![]()
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