[Openicc] What is exactly needed: Embedded Profile in CUPS raster !!

[Chris Murphy]

OK so if Draft and Best are unambiguously the lowest and highest resolutions respectively, everything else is "Normal"? My point is I think Draft, Normal and Best lack sufficient granularity for displaying Print Quality information.

It would be nice if the profile metadata for Print Quality mimics the language used in the print driver: Fast Economy, Economy, Standard, High, Photo, Super Photo, Ultra Photo; rather than having to lump two economies into "Draft", Ultra Photo into "Best", and all of the others into "Normal."

Otherwise reasonable users will wonder why Print Quality is considered "Normal" for the profile, and yet it's Super Photo for print resolution.

Chris

On Jun 6, 2011, at 6:07 PM, Robert Krawitz wrote:

> On Mon, 6 Jun 2011 09:31:14 -0600, Chris Murphy wrote:
>> 
>> For Epsons, they consider 180 dpi and 360 dpi to be "Draft"
>> modes. Anything higher, such as 720 dpi is "Fine" or "Photo".
> 
> It varies.  On printers like the 2880, 720 DPI is very good on most
> papers and 1440x720 DPI is really good (the printer can use the
> smallest drop sizes at those resolutions).  On the R1900, you need to
> be up at 1440x1440 to use the smallest drop size, and that on a
> printer that doesn't have light inks.  Light inks typically yield a 3x
> reduction in grain, so the smallest drops on the R1900 are roughly
> equivalent grain-wise to 4.5 pl -- bigger drops than the 2880 or 3880.
> 
> At 1440x720, the smallest drops on the R1900 are 3 pl, which is about
> equivalent to 9 pl on a CcMmYK printer -- basically the same as the
> Stylus Photo EX.  At 720 DPI, we have to use even larger drops --
> about 7 pl smallest drop size, looking at the numbers.  That's better
> than the Epson Stylus Color 3000 (10 pl), but not by very much.
> 
> (BTW, Gutenprint uses slightly different terminology: Fast Economy is
> usually 180 DPI or so, Economy is about 360x180, Draft is 360,
> Standard is 720x360, High is 720, Photo is 1440x720, Super Photo is
> 1440x1440, Ultra Photo is 2880x2880, and Best is the very highest the
> printer supports -- anywhere from 720x360 DPI on some ancient machines
> to 5760x2880 on most of the current printers.  But it amounts to the
> same thing.)