I want to use an image from a magazine as a decal. How can I get rid of moire patterns from the scan process?
Here is a method for getting rid of moire patterns that I used in my print graphic days. Scan in at 300 ppi (any larger and the following steps don’t usually work to well as the individual, printed, dots encompass more than a few pixels each). Preform the following filters in this order to the raw 300ppi scanned image: • Despeckle Twice • Gaussian blur @ .7 pixel radius • Median 1 pixel radius (sometimes 2 pixel radius) (and after a little levels adjustment and whatnot, I usually do an unsharp mask at like 150% 1.8 pixels, and 4 threshold levels.) Scanning at a higher rez than what you ultimately need is good because each time you do something to your photo, it reduces the information left. But higher that 300ppi on anything other than a real photo doesn’t really do it for me. Here’s why: What I like to do is scan in at at 300 ppi as it roughly encompasses most linescreens (such as 133 to like 175 linescreen), which is what most stuff is printed at. depending on if you use the 2Xlpi or