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Unsharp masking (USM) is an
image sharpening technique,
first implemented in
darkroom photography, but now
commonly used in
digital image processing software...
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types of unsharpness:
geometric unsharpness,
motion unsharpness and
photographic or
system unsharpness.
Motion unsharpness is
caused by
movement of the patient...
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contrast masking is
unsharp masking, an
unusual term for a
process intended to
increase the
apparent sharpness (acutance) of an image.
Unsharp masking uses a...
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negative (high
acutance developers), or by
optical means in
printing (
unsharp masking). In
digital photography,
onboard camera software and
image postprocessing...
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masks to
produce three contrast reducing and
colour correction unsharp masks. The
unsharp masks were made with an
oblique light source (and a
clear film...
- higher-resolution images,
while lower doses lead to
increased image noise and
unsharp images. However,
increased dosage raises the
adverse side effects, including...
- The
unsharp mask tool is used to
sharpen an
image selectively – it
sharpens only
those areas of an
image that are
sufficiently detailed. The
Unsharp Mask...
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Overshoot (bottom of image),
caused by
using unsharp masking to
sharpen an image...
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detection (edgedetect)
Sobel Filter (sobel)
Prewitt Filter (prewitt)
Unsharp masking (
unsharp)
Denoising (atadenoise, bitplanenoise, dctdnoiz, owdenoise, removegrain)...
- have a
small image circle. Such
lenses will give
noticeable vignetting or
unsharp outer areas if used on a 35mm film or full
frame sensor cameras. To a lesser...
