Re: Resolution and Banding

[HMSDOC@aol.com]

This may be a naive question...but does this mean that if you have the data 
available from high resolution scanning that the best print results would be 
obtained by sending the printer an image at 720 or 1440 ppi rather than 300 
or 360?

Howard

<< Upsampling is NOT implemented directly, but is a process of the dot 
 placement algorithm which Epson uses, which redistributes the 
 quantisation noise in the image to retain as much detail as possible.
 
 Thus, in your example of a 457ppi image printed on an Epson printer, if 
 the printer is using 720ppi, it will not be directly resampled and the 
 full detail from the original resolution is retained.

 You can check this, as I have on several occasions, by the use of 
 synthetic test patterns and assessing exactly where the output spatial 
 frequencies are aliased to.  Providing that the input test pattern is 
 lower than the limiting resolution of the dot pattern, there is no 
 resampling and only the noise spectrum in the image is reshaped.
 - -- 
 Kennedy >>
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