PS - BTW, I have never had a problem with PhotoZoom Pro inventing unbelievable texture or edge artifacts, but I always tweak every available knob in any software I am using, LOL. IMHO, there is absolutely nothing that beats personal experience when working in this area. Some do better in areas with a relatively small number of well separated, sharp, well defined edges, some do better in areas where there are many, closely (and possibly regularly) spaced edges, some better where there is a more natural, fractal-like texture that needs to be interpolated. In fact, I find that often, one algorithm will be better in one part of the image, whereas another algorithm will be better in another part of the same image. After following this field for at least 2 decades, I find general discussions without reference to specific example images to be next to useless (at least for the better algorithms). My opinion is that the only way to tell which is "the winner" is to try them for yourself on the particular image that you need resized. I own and use all three of the image resizing packages you mentioned, plus a couple more. Personally, I don't have time to discuss that enormous literature base here. For example, a Google search on produced over 10 million, very reasonable hits. As I'm sure you must know, discussion of the best image resizing algorithm / software package has been a real can of worms that dates even from pre-Photoshop days, ie, the late 1980's through late 1990's, when many of the algorithms were still being discussed in Computer Science classes and graduate school research.
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