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if a simple lights luminosity selection
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is all that we could make it would still
be a very useful image developing tool
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however we are not limited to a single
luminosity selection
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all the basic lights luminosity
selection is based on the brightness
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values have the pixels in an image that
are 50 percent gray or later
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it actually is possible to create
selections based on
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any luminosity value and make masks
letter refined for adjusting very
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specific tall ranges
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within the image is also possible to
save different luminosity masks as out
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the channels in the channels panel
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so that they don't have to be recreated
each time you want to use them
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let's look at how to make more refined
nasty selections
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as we already know pulling out
controller command on a Mac
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and then clicking Hana channel in the
channels panel
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will create the initial lights selection
most the time I make my selections from
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the RGB channel
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before the individual color channels
allows me to create a selection that
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better suits my needs
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I'll use it 17 made a luminosity
selection
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I can save it as an alpha channel there
are several ways of going about this
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the simplest is to click the Save
selection as channel icon at the bottom
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of the channels panel
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with the selection is saved as a channel
it will be called
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alpha-1 you can double-click the name
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and change it to something more
informative in this case
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let's call it lights another way to save
the selection as an alpha channel
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is too low to selection which we already
have and then go to the Select menu
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and select save selection
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this brings up a dialog that allows us
to name a crazy here
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when you click OK the save channel will
appear in the channels panel
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2d select a selection
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press Control or command and then d
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on the keyboard to reload a selection
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you can hold down the controller coming
key and click on the channel
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or you can highlight the channel and
then click to load selection icon
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it's important noting at this point that
every time you save
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a luminosity selection in the channels
panel it contains nearly as much data as
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the original image file itself
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so if you have a whole bunch luminosity
channel saved illness that your file
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size is getting very large
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if you have a luminosity channel save
that you no longer need it's a good idea
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to delete them
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to delete a luminosity channel simply
click on it and drag it to the trash
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let's make some more constrained
luminosity selections
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we can get backer original light
selection that we made by control
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clicking on it now will hold down the
Control
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plus the alt plus the shift key this
should be command
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option shift on a Mac and then I'm gonna
click on this light selection a second
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time and you'll notice that the marching
ants
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are now since circling much smaller
areas the first click
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select based on the pixels with 50
percent or greater than our city
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and the second click for the selects the
next fifty percent latest pixels
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I have to call this a 25 percent light
selection
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even though I don't think the math is
quite that simple Tony refers to this
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selection
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in his written tutorials and in his
actions as a light
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lights selection but say the selection
as a channel to name it light lights
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nada de select this selection go back to
the RGB
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color image it would be possible to
continue making
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additional 50 percent lights selections
by
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control alt shift are Command Option
shift clicking
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on this lights channel or on the RGB
channels as the RGB
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and the lights channel both have the
same luminosity values
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and in doing that I would be making
further 50 percent selections each time
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however tony's actions take a little
more aggressive approach
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what Tony calls a bright lights
selection is actually the intersection
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up to
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light lights masks to make this
selection
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control alt shift or Command Option
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shift and then click on the light lights
channel
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twice and save it with the name
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bright lights
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Control Alt Shift clicking on the light
lights channel
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twice to make a bright lights channel is
essentially the same
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has Control Alt Shift clicking on a
lights channel
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four times by intersecting selections in
this way
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is possible to quickly isolate the very
brightest portions at the image
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from the darker portions of the image
within a selection the final lights mass
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that Tony's actions will generate is
called super lights
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the selection is made by intersecting
too bright lights elections
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so Control Alt shifter Command Option
shift
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and then click on the bright lights
channel two times
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and now save
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that selection has a channel hand
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name that channel super lights
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creating the super lights channel
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by Control Alt Shift clicking on the
bright lights channel twice
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is essentially the same has Control Alt
Shift clicking
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on the lights channel eight times
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after the production of these videos had
already begun
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tony and I found out about the correct
color space in Greece base pairings
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that I shared with you in an earlier
segment using the correct pairings
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allowed for even finer tone separation
the luminosity selections
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this enabled Tony to add an additional
action for creating an
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ultra selection which even further
isolates the latest luminosity values
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to create the altar lights election
intersect
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to super light selections to get the No
pixels are more than 50 percent selected
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warning
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click OK and save the selection
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and name the selection ultralights
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this ultralight selection is equivalent
to control or option clicking
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on the lights channel 16 times
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to better understand how the various
light selections are being made %uh
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build it all again using a gradient
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repeating the process from our color
image
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I'm gonna start by control clicking on
the RGB channel
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to make the initial selection and the
save this
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and call it lights in our control
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shift click on the lights again to make
the next election and save that
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calling it light lights
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al Control Alt Shift click on the light
lights
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again and save it
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and that's gonna create a bright lights
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selection and finally %ah Control Alt
Shift click
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on the bright lights again and save that
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as a channel that is
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