Forum: Photography


Subject: Need Help Reducing "Aliasing"

funkandjazz opened this issue on Jun 25, 2003 ยท 7 posts


DHolman posted Wed, 25 June 2003 at 2:34 PM

Oh yea, one thing to remember. This technique uses changing the ppi to do its image reduction. Don't get hung up on that. The whole idea of 72ppi being what you need to go to is a bogus idea that hasn't been true for almost 20 years (still wonder why that idea persists). What he is doing is using the ppi to halve the image each time. That way, he isn't depending on an exact starting image size (but in a range of starting sizes). If youre scanner is neither 4000dpi or 2700dpi then you'll need to figure out what your starting ppi should be that will get you to the resolution you want the final image to be at when done. Did that make any sense? -=>Donald