I am trying to figure out the most efficient method for editing raw scanned documents so they look best at 72PPI when published on a website. I have an example here which is from a 600DPI source scan. I have already applied a Gaussian Blur onto both images.
This 1st graphic is resized using
Image -> Image Size... where I merely updated the DPI from 600 down to 200. This auto-resized the image dimensions from 800x560 down to 269x187... and you can't really see the dots anymore, but the graphic is much smaller than the original.
Now here is a sample of the raw image which I basically copied from a 600DPI doc into a new doc(same dimensions) at 72PPI. It looks exactly the same, and the dots are still very noticeable. Here is a shot from the 600PPI copied into a 72PPI document:
I am wondering why the difference between 600 and 72 isn't noticeable when copied over into a new doc, but when rescaled it does appear much smaller and smoother?
And to finish my question, is the "native" size for this image always going to be way smaller than the original scan? Meaning no matter if I scanned at 300DPI, 600DPI, or 1200DPI it's always going to look the same when rescaled down at 72PPI? The bigger graphic above simply has way too many dots and I don't see any possible way to clean it up and still keep the dimensions 800x560.
If I can clarify anything else please let me know. I've been struggling with this for a while so any help would be more than appreciated!