Re: CoolPix 950 question [off topic]

[Todd Martin <todd@xxxxxxxxxxx>]

>A generally accepted resolution for "photo quality" (i.e. as good as
>an original high quality photo) is 300 dpi. The 950 is 1200x1800
>resolution, so it would yeild a 4"x6 print at 300 dpi. At 150 dpi,
>yeilding a lower-quality image with some visible digital effects

Here's my take on image resolution for printing...

The 300 dpi rule is from traditional halftone printing (press printing and older desktop computer printers). Here the rule of thumb is image resolution (dpi) should be twice the line frequency (lpi) of the halftone. The lpi is device dependant and related to the dpi of the printer. Any more resolution than this is wasted data (and space from big images).

Most color inkjet printers today use stochastic screening or similar technology that needs much less image resolution to make good looking images. Some even interpolate image resolution on the fly if needed.

Anyone have a rule of thumb for needed image resolution for the new generation of (affordable) inkjets? Particularly the HP 970C I've got my eye on.

~Todd

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