What's the purpose of the 30 degree rotation? Pixel melding/blurring?
Chuck Norcutt
On 1/31/2013 12:27 PM, Ken Norton wrote:
>> Thanks, Ken. I am watching a tutorial on Photoshop and may someday know
>> how to do what you suggest. I'm not deleting any of the marginal scans
>> because someday there may be a way to fix them!! Maybe my grandkids can do
>> it ;-)
>
> There is a nifty trick that just might work in the case where you
> really do want to save an image. There is some astrophotography
> software that will do this automatically, but here we go.
>
> 1. Apply a blur to the image to make the sharpest part of the image
> match the point of greatest concern--usually the eyes. As the eyes are
> already out of focus, you won't lose any more resolution there.
>
> 2. Apply a moderate amount of noise reduction to tone down the grain.
>
> 3. Upsize and rotate the image by 30 degrees in a single step. PWP has
> this ability built-in, otherwise an astrophotography image processor
> may be required. I don't know if PS has this ability. The upsize
> should be to at least twice the linear dimension. Not remember
> exactly, as it has been a while since I've done this last.
>
> 4. This is where things get tricky. The ordering of the next two steps
> may depend on the specific image and your computer. But you will need
> to downsize the image by at least 50% and also apply a deconvolution
> sharpening. Deconvolution sharpening seems to be the best option here.
> But you will need to sharpen and downsize the image.
>
> 5. Rotate and crop.
>
> 6. Final post-resize and rotation sharpening, and output sharpening.
>
> The key to this process is two things that work together. The 30
> degree rotation and the deconvolution sharpening. In order for it to
> work, though, the entire image has to have a certain baseline of
> defocus.
>
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|