Results were a function of magnification. Using files from a 5-megapixel camera, I matched PhotoZoom Pro against the Bicubic Smoother setting in Photoshop CS2. The proprietary S-Spline XL algorithm is the best. Simply type in new settings for image size and resolution, then choose from one of several interpolation algorithms. PhotoZoom’s interface has a large preview window and is easy to use. It supports batch processing and 48- and 64-bit images. BenVista claims that their S-Spline XL algorithm in ProtoZoom Pro 2 renders higher quality output by analyzing “the sharpness and evenness of the original image and deciding which parts of the image must be enlarged.” PhotoZoom Pro works as a standalone application and as a Photoshop export plug-in. How your interpolation software analyzes the file and creates new pixels with a minimal loss of quality is key. One of my photography teachers said, “If you can’t make them good, make them big.” However, enlarging low-resolution digital files usually means a loss of quality, manifesting as serrated edges, color artifacts, and loss of smooth gradients and detail. Plug-in successfully enlarges low-res files
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