Luminous Landscape Forum

Raw & Post Processing, Printing => Adobe Lightroom Q&A => Topic started by: thill1111 on January 29, 2021, 09:19:13 pm

Title: Output Sharpening and Resolution Setting in LR export
Post by: thill1111 on January 29, 2021, 09:19:13 pm

Does the ppi resolution setting have any effect on how Output Sharpening works in exporting from Lightroom?  I understand that the ppi resolution setting has no effect on the image pixel dimensions, but the does a value of 150 or 300 or leaving it blank make a difference on the result of Output Sharpening?

My understanding is that Output Sharpening is dependent on output size, but it's unclear to me if it's dependent on and a function of the pixel dimension size only or the actual print size which would take into account ppi.

Title: Re: Output Sharpening and Resolution Setting in LR export
Post by: digitaldog on January 29, 2021, 09:38:23 pm

The PPI value has absolutely no effect on sharpening (or for that matter, much of anything useful  ;) ). It's the pixel density that is used not the PPI (resolution) tag.
Export the same image at say 1000 pixels along the long axis but set one for 300PPP, the other at 72PPI, subtract the resulting two files: Identical pixel for pixel.

Title: Re: Output Sharpening and Resolution Setting in LR export
Post by: thill1111 on January 30, 2021, 11:03:52 am

Quote from: digitaldog on January 29, 2021, 09:38:23 pm

The PPI value has absolutely no effect on sharpening (or for that matter, much of anything useful  ;) ). It's the pixel density that is used not the PPI (resolution) tag.
Export the same image at say 1000 pixels along the long axis but set one for 300PPP, the other at 72PPI, subtract the resulting two files: Identical pixel for pixel.

Thanks. That's what I thought.