When applying filters such as accented edges, ink outline, etc to a medium sized image (1024x768 or 1280x853) produce some pretty cool results.
However, when applying those same filters to larger images like files with a 5184x3456 resolution, the filters have little to no effect. I'm guessing this is because there are so many more pixels that altering each pixel has a less noticeable effect.
You can see an example here with the accented edges filter run over a smaller version of a picture I took, and then a larger one (that was then downsized to make it viewable):
The 1280x853 one looks pretty cool. On the larger 5184x3456 version the filter had almost no noticeable effect.
The problem is that I want the cool looking version like is seen in the 1280x853 version, but at a high enough resolution to print on a large canvas that is, say, 40' x 40' or so. Is it possible to get the bigger image to look like the smaller one without losing the resolution required to print it on a canvas that large? I've been trying to figure this out for weeks now...
Many of the filter controls are pixel size dependant. For example if you want similar appearance with an image twice as large in pixel size, you have to increase the value of the controls twice as much. And if you are using maximum values or values that will exceed maximum when doubled, you are out of luck.