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Transcript of balisado desuacido tle
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Sharpening the
DetailsLisa Desuacido
Deena BalisadoII-Amethyst
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What is Sharpening?
All digital photographs lose a certain amount of
sharpness. That means that most photographs
will look a bit blurred and their details wontbe as prominent. Basically, sharpening makes
the edges of a photographed object appear
more distinct.
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Where can we find the sharpening
tools?
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Smart Sharpen
The Smart Sharpen tool is one option
that adds more flexibility that can
improve the sharpening process.Smart Sharpen is opened by selecting
Filter/Sharpen/Smart Sharpen
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There are two ways of working with the
Smart Sharpeninterface, Basic and Advanced. The
Advanced mode has the same settings as
Basic andallows you to fade the effect inthe shadows and/or highlights.
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Amount: Like Unsharp Mask, a higher value
increases the contrast between edge pixels,giving the appearance of greater sharpness.
Radius: How far out do you want to apply theeffect? The greater the radius value, the wider
the area that will be subject to an increase incontrast. Enter too large a number and you willhave noticeable halos.
Remove: O
ffers a selection of three ways tofind and minimize the blur, thus sharpening theimage:
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The remove options
Gaussian Blur
This option works like the Unsharp Mask
filter and is the fastest.
Image blurred using Gaussian
blur with = 2.
Original image
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Lens Blur
This option does a great job looking foredges and detail and thus produces finer
sharpening of detail.
Original image Using lens blur
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Motion Blur
this option has to do with improving thesharpness of images where there was blurring
due to motion (e.g., camera movement).
Motion blur Original image
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More Accurate:Processes the file twice for
better removal of blur and enhanced sharpness.Be warned, this option can double processing
time.
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Advanced Settings
Fade Amount: This adjusts the amount of
sharpening in the highlights and/or shadows.
Fade it all the way (100%) to conceal the
sharpening. No fade (0%) gives maximumsharpening.
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Tonal Width: This controls the range of tones
that are modified by Smart Sharpening. Thelower the setting the more subtle the result.
Radius: The slider works like Radius in Basicmode and controls the size of the area around
each pixel that is used to determine whether a
pixel is in the shadows or highlights.
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Unsharp Mask
Unsharp Mask is the heavy weight of all the
sharpening tools. This offers you a lot of
power and control over the sharpening
process.
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The amount changes the amount of contrast
between pixels. The more the amount the moreyou will notice a change in the picture. If you
set this too high then the halos around edges
will be too noticeable and the picture will look
terrible. The amount that you need is
determined by the subject matter and the
resolution of the image.
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The Radius is the size of the halo around the
edges. One side of the edge will have a lightercolor and the other side of the edge will have a
darker color. The number that you are
changing is the number of pixels surrounding
the high contrasting areas. High resolution
images will need a higher radius. Low
resolution images will need a lower radius.
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The Threshold determines what exactly you
want an edge to be. Photoshop thinks thatcolors that are touching and are very different
from each other are edges. If your threshold is
set to 0 then everything will get sharpened
(including noise). This option allows you tochoose what should get sharpened. A threshold
of over zero will only sharpen areas with high
contrast and wont touch areas with lowcontrast.
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