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Re: Quoting accuracy of color measurement instruments




On Oct 31, 2007, at 4:27 AM, David Scharf wrote:

iOne Pro: Wow, 35 or 36 bands in 10 nm steps, but only measuring 3.5 nm for each 10 nm band? (According to the on-line brochure). That's a 350 nm spectral range but only 122.5 nm of that range is actually measured (the rest interpolated, I assume). Do I understand this correctly?

I think you've got it backwards. It takes samples at 3.5nm intervals (actually, I thought it was 3.3nm or 3 samples per 10nm, but that's quibbling I guess) or roughly 100 samples and then averages/ donwsamples the results to 10nm intervals. Some of the older X-Rite devices took samples only every 20nm and then upsampled these to 10nm.


Regards,
Terry

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