Don't know if anyone has any info on this but I love zooming into 600dpi scans of magazines and album covers, and was wondering if there was a filter I could use in something like GIMP to apply to high-resolution digital images I have saved (bonus points if you know the album of picrel)

>>459579 (OP)
A filter do what? A filter to remove the rosette or apply it to different images?

>>459592
apply it to different images, but very subtle and small so you can only see it clearly when you zoom in like 500%, not like those shitty half tone filters people slap onto images

My first thought is to actually just halftone your image at some really really really small dot size.

>>459579 (OP)
look up tutorials for "halftone" and "print rosette digitally" and other things along those lines. Plenty of tutorials and photoshop actions. Explore it until you can achieve the desired output.

>>459579 (OP)
open an image in photoshop
change image mode to cmyk (this effect does not work on rgb but once you have made it you can just convert back to rgb)
upscale image to 144 or 300 dpi depending on original size
use filter pixelate color halftone with max radius of 4 pixels (smallest it allows)
you can change channel angles until you get your desired look

>>459579 (OP)
Do you want to reproduce the imperfections or are you looking to remove the imperfections? If the latter, you want some kind of sharpness filter.