Canon Pro-4100 with internal densitometer: Sufficient for ICC profiles?

Started 4 months ago | Discussions thread
ColourPhil Regular Member • Posts: 350
Re: Canon Pro-4100 with internal densitometer: Sufficient for ICC profiles?

As you say, it's a densitometer and not a spectrohotometer. A densitometer measures the 'density' of typically 3 (4 with 'visual' or 'black') wide areas of the spectrum through 3 (R,G,B) colour filters. A 'spectro' measures the entire spectrum, probably across about 32 areas, each of about 10nm (or less).

The densitometer is used to 'calibrate' (probably 'linearize') individual CMYK channels.

The resulting proprietary calibrations will be used internally by the printer and/or its driver.

After this the combination of printer, paper, ink can be 'characterised', i.e. 'profiled' with a 'spectro' and appropriate software. This software isn't available for 'densitometers', to my knowledge. The resulting ICC Profile can be used by any ICC-aware software, such as Photoshop, to convert images to the printer/paper colour space while sending them to the printer. Profiles are also used for 'soft proofing'.

A bit of background info on Printer Profiling:



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