About Photogrey
The PhotoGrey plugin was
created as a companion to the Sketcher plugin,
providing colour filtering to create better
illumination sources for Sketched images.
It works like a colour filter in black and
white photography, producing a greyscale
image.
PhotoGrey has developed
to provide useful imaging functions for
traditional digital photography; unique
greyscale gradient filtering and colour
enhancement/suppression on colour images.
Using PhotoGrey
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The
image on the left shows the
interface when the plugin is
first run. There are three components
to the interface. The top four
choices allow the selection
of a simple single-colour filter,
a horizontal or vertical colour-gradient
filter, or four separate colours
for each corner.
Underneath these
is the colour selection box.
This will show one, two or four
boxes depending on the type
of gradient chosen. To change
the colour of a box simply click
it and a colour selector will
appear.
The third component
is a selector for whether you
wish to preserve the colour
in the image. By default this
is off and the result is a greyscale
"black and white photograph".
When selected, the resultant
image preserves the source images
colours but adjusts different
colour intensity based on the
filter results. |
As example of the
effect of the plugin, here is a source image
and the results of filtering through different
single colours.
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Original picture |
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Normal
"convert to grey/greyscale"
result |
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PhotoGrey
orange filter applied |
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PhotoGrey
green filter applied |
This image shows
the interface with a four point
gradient selected. There are
four colour boxes as a result,
three set to red and the fourth
set to blue. The images below
show the results of using PhotoGrey
with 'Preserve Colour' selected.
The last image illustrates the
application of the four-point
filter shown on the right. |
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Original
picture
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Blue
filter : renders a dark,
low-key, atmospheric scene
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Red filter
: Similar in effect to a polarizng
filter, it accentuates the sunshine
and warm autumnal feel |
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Four
Point filter : Three red corners
and blue in the bottom right,
highlighting the left sunlit
tree and pushing the right sunlit
tree into shadow |
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