Re: Colorsync-users Digest, Vol 4, Issue 347
Re: Colorsync-users Digest, Vol 4, Issue 347
- Subject: Re: Colorsync-users Digest, Vol 4, Issue 347
- From: Roger Breton <email@hidden>
- Date: Tue, 25 Sep 2007 07:53:32 -0400
Graeme,
> upsample to 1nm spacing, and then used a simple box integration.
How can 3nm or 10nm data be "upsampled to 1nm", isn't it rather
"downsample"? Suppose I use MeasureTool and get 10nm data, does the CIE
recommend to upsample to 1nm for multiplying with 1nm Standard Observer
x-bar, y-bar and z-bar? If I look at 15.2-1986, Table 2.1, p.56, they only
have 5nm data. I know that ASTM has tables with 10nm and 1nm data but I'm
unclear what this implies for emissive mode readings. Perhaps I'll refresh
my memory and look at your code for answers -- which module?
> The upsampling uses a 3rd order polynomial for input spacings worse
> than 5nm, and linear interpolation for inputs with 1nm to 5nm spacing.
This is really interesting, Graeme. Thank's for the head up.
> Graeme Gill.
Roger Breton
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