What causes white fringe?

[Kent Shafer]

<p>Can someone please help me figure out what's causing the white fringe along the left side of the red parts of the cones in this image? This is a Nikon NEF capture, processed with ACR default settings and no sharpening, then saved as a jpeg. Sharpening and boosting saturation make the fringe even more obvious, but it's plainly visible even in this plain vanilla version.</p>

<p>I've tried the ACR chromatic aberration sliders and "Defringe" but to no avail.</p>

[Kent Shafer]

<p>Here's the image.</p><div></div>

[Kent Shafer]

<p>And here is a version with sharpening and some other post processing.</p><div></div>

[Stock-Photos]

<p>Ken, it's not noticable. Don't worry about it.</p>

[michaeljlawson]

<p>Based on the shadow on the other side of the cones, my first guess is that it's simply a little sun glare off the red glossy paint. Can you post a 100% crop of one of the cones and the front of the plane wings?</p>

[Kent Shafer]

<p>Here is a 100% crop.</p><div></div>

[Kent Shafer]

<p>And here's another one.</p><div></div>

[michaeljlawson]

<p>I'm sticking with sun glare that got exagerated a bit by the post processing.</p>

[peter_wang6]

<p>I'm not sure it's sun glare. When I look at the contrast-boosted photo, I can clearly see that the red part of the cone makes the adjacent green water appear lighter, whereas the reverse is true for the white part of the cone. I don't think it's a color-contrast optical illusion. It is subtle but definitely there.</p>

[Kent Shafer]

<p>Thank you J. and Michael.</p>

[charlesheckel]

<p>What causes white fringe? That I can answer--old age! ;-)</p>

[Kent Shafer]

<p>Thank you Peter.</p>

<p>Good point Charles. White fringe is about all I have left.</p>

[nico_.]

<p>Local contrast enhancement via unsharp mask with big radius or pushing up the clarity slider in Lightroom or ACR does this.</p>

[Kent Shafer]

<p>Nico. - Thanks. I did both of those things in the processed version, and they did make the white lines stand out more. But the phenomenon is present even in the unprocessed version - the one posted first.</p>

[parv]

In the processed version, the cones have acquired distracting halos, most noticeble is in the center cone. I do not have a solution as I am currently searching for one (for GIMP).