Photoshop_User_February_2017

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kelbyone

.com

067

SHAKE REDUCTION
The Motion Blur correction mode in the Smart Sharpen
filter is only able to correct for camera shake by assum-
ing the camera movement is in a linear direction. The
Shake Reduction filter (Filter>Sharpen>Shake Reduction)

provides a more advanced correction for images that suf-

fer from camera shake by calculating the precise blur trace

shape. It then uses this to recalculate the image without

camera movement.

Admittedly, the results do tend to be

a bit hit-and-miss, and where the filter

does work you can’t always expect mir-

acle results. The complex filter interface

is enough to give anyone a feline brain

freeze, but there’s a really simple way to

approach using the Shake Reduction filter.

If the initial preview shows no improve-

ment, there isn’t much point trying to make

it look any better. But if the filter preview

shows some promise, then it’s worth per-

severing to refine the settings and obtain a

better result. That said, the default settings

are usually as good as it gets, and what

I tend to do is increase the Blur Trace Bounds

slider to see if it produces a better-looking

image. If not, I’ll stick with the defaults.

The original photograph was shot hand-held at 1/10th of a second, so it isn’t surprising there was some camera shake.

Here you can see close-up views of the image before and after I had applied the Shake Reduction filter.

Here, I went to the Filter menu and chose Sharpen>Shake Reduction to open the Shake
Reduction filter dialog. This automatically worked out where best to add a Blur Estimation
region and auto-calculated the optimum Blur Trace Bounds setting to apply.