Luminous Landscape Forum

Raw & Post Processing, Printing => Adobe Lightroom Q&A => Topic started by: dwood on August 12, 2008, 03:10:18 pm

Title: The "new" ppi math
Post by: dwood on August 12, 2008, 03:10:18 pm

Okay, so the conventional wisdom regarding image print resolution was that if your image had a native ppi between 180 and 480, you were better off not up-res'ing. So, I just watched the LL L2R video that covered the print module, and seems like the 180-480 thing may be changing. I'd be very interested to hear from you Jeff on what the "new math" findings are pointing to.

Title: The "new" ppi math
Post by: Schewe on August 12, 2008, 04:05:32 pm

In Lightroom 2.0, I've found that "some" images may benefit from setting a higher PPI setting in Lightroom and then let LR 2 do the output sharpening at that high resolution. Generally, only a 50% or so increase would show any benefit and only on a few images with a LOT of super high frequency textural detail (and I mean super high frequency and it only helps a "bit"). And, that's only with images with enough base resolution to work with.

So, going from 300>360 or 360>480 may show better high frequency detail...but trying to go from 180>480 is a waste of time.

Title: The "new" ppi math
Post by: dwood on August 12, 2008, 05:25:34 pm

Quote

In Lightroom 2.0, I've found that "some" images may benefit from setting a higher PPI setting in Lightroom and then let LR 2 do the output sharpening at that high resolution. Generally, only a 50% or so increase would show any benefit and only on a few images with a LOT of super high frequency textural detail (and I mean super high frequency and it only helps a "bit"). And, that's only with images with enough base resolution to work with.

So, going from 300>360 or 360>480 may show better high frequency detail...but trying to go from 180>480 is a waste of time.
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got it - thanks

Title: The "new" ppi math
Post by: sralser on September 25, 2008, 08:20:15 pm

So, going from 300>360 or 360>480 may show better high frequency detail...but trying to go from 180>480 is a waste of time.
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My question - these numbers you state - these would be printer independent, or would you use different values for a Canon printer vs an Epson vs HP.?

thanks


Steve