Best Way to Upsize and Sharpen Foveon Images?

First published on: Sunday, 14 September 2008

Foveon-based cameras such as the Sigma SD14 (read more on Sigma digital products) outputs images that lend themselves very well to enlargement, much more so than images from digital SLR cameras such as the Nikon D90 or Canon 5D Mark II.

The question remains though, thus one sharpen before, or after enlargement?

There is also a method which involves blurring the image slightly before upsizing.

Well, Gary Mercer suggests not to use the blurring method in this hot thread, preferring to sharpen after upsizing.

In that same thread, Guenter Borgemeister posted a comparison using various sharpening strengths, and concluded that too much sharpening would introduce artifacts when the image is zoomed in at 400%.
Sharpening compared for upsizing Foveon images

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