DP2m Lens Distortion Problem

Started Sep 3, 2012 | Discussions thread
Johan Borg Senior Member • Posts: 2,508
Re: How to fix distortion and retain most of the Foveon sharpness...

Robert F. Tobler wrote:

  • upsize the image with either OnOne Perfect Resize (formerly known as Genuine Fractals) or Alien Skin BlowUp to 150% to 200% the original size.

[snip]

  • downscale the image with Photoshop "Bicubic (best for smooth gradients)" by the inverse of the scale up percentage.

Try this: Upscale with your algorithm of choice, then downscale to original size without any other changes and compare to original. Then: Upscale and downscale with Photoshop Bicubic. Compare results.

I find that upscaling followed by downscaling with regular bicubic both ways give a result very close to the original. Fancier algorithms tend to introduce more artifacts from my experience.

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