[Lcms-user] Problems with XYZ -> Printer Profile transform

[Alastair M. R. <bla...@fa...>]

Hi,

I'm trying to do a direct transform of XYZ values from my colorimeter 
into RGB values from a printer profile, but I'm getting very odd results...

The program I'm using is included below, and the profile can be found at
http://www.blackfiveservices.co.uk/R300_Tesco_20050929.icm (generated 
using Argyll)

When I sample a black square from the target used to generate the 
printer profile, I get:
XYZ: X: 0.0231488, Y: 0.0225699, Z: 0.0167407
RGB: R: 95, G: 143, B: 133

A magenta square comes out as:
XYZ: X: 0.289546, Y: 0.142001, Z: 0.0952269
RGB: R: 131, G: 227, B: 159

If I use sRGB instead of my printer profile I get reasonable values, and 
the printer profile works fine for sRGB->Printer use, so I'm totally 
baffled as to why this is happening...

Can anyone shed any light on this?

(I'm using LCMS-1.14 BTW)

All the best,
--
Alastair M. Robinson