Apaflo wrote:
There is no halo on the download original image, but there are JPEG compression artifacts on the thumbnail that appear to be a halo.
That is the result of starting with a very large original that has been sharpened at that size, and then resizing it smaller with an algorithm that causes ringing. You are no doubt seeing the same effect when it is displayed in your editor or with any viewer
You can correct this by applying no sharpening at all until the image is resized to the ultimate final size. It might also help on your home monitor to be sure to resize using appropriate software if you are super critical.
If the original is a SOOC JPEG from the camera the sharpen setting in the camera should be reduced to prevent this on future images. For this image it can be fixed by applying a very small amount of Gaussian blur to a copy of the original full size image and then use that to make smaller versions that you only sharpen after resizing.
There is no halo on the download original image, b... (
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It is possible that there was in-camera sharpening but this is no longer an issue. Thanks for the PP suggestion.