Friday, May 28, 2010

Gaussian Blur filter




This post is to show a 100% blowup of a detail in a photo from the nc2000e. When zoomed in at 100% or more, jaggies at the curved edges show up in the photo. After studying the problem, I've found that a .2 or .3 radius adjustment in the blur filter gaussian blur smooths out the jagged edges without affecting the sharpness of the image too much.

The first photo (top) shows the full image with no crop. The second zoomed in image (middle) shows the detail before applying any filter. The third image (bottom) shows the detail with gaussian blur filter applied.

It would be best to download the photos to your own computer and then open them in Photoshop to see the differences. The top photo is the original unaltered image and can be downloaded to do your own tests. Also note that using Photoshop's RAW converter, I set the image to open at its original 1.3MP size. No interpolation was used. The differences would probably be more pronounced if other sizes were applied. It does let you choose between 1.3, 3.4, or 5.2MP. I usually set it to 3.4.

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