I need to upsample an 8 bit grayscale TIFF file from 2560 to 12300 px in its largest dimension. I know there is an option to do this in the Print module as well as in the Export dialogue box. However, it seems to me that sharpening and noise reduction should be done and evaluated on the image at full size--i.e., that it would be better to upsample first thing and then do all retouching, tonal adjustments, sharpening and noise reduction on the upsampled image.
Alternatively, would it be better to do all editing first, and then perform upsampling and output sharpening at the export stage? (I will not be printing, but sending a file off to print.)
In principle would it make any difference if the image were a RAW file instead of a bimap (TIFF)?
Thanks,
Kevin