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Before we continue our discussion
on external editing preferences,
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we need to build an understanding
of some key terms.
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Since the start of this course.
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We've already tossed around
a number of file format types.
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We referenced.
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JPEG files, TIFF, RAW and DNG.
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But what do all these mean
and why are there
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so many?
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Firstly, it's important to understand
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that your digital image file
is composed of bits of data.
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A wider depth of colors in your photos
equates to more data
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and consequently a larger file size.
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To prove this point,
I'll do a quick demonstration
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in Photoshop.
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I still have that image open
that we worked on earlier.
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This is a full color image.
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I'll go ahead and save this
file on my desktop as a JPEG
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and I'll call this sample one.
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Change the format to JPEG
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for the quality.
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I'm setting it to maximum.
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Now I'm going to save this exact
same file again,
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but before I do, I'm going to convert it
to black and white
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and I'll save it as sample to
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format again as JPEG
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and the quality again is maximum.
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Now you can see the two files here
on my desktop sample one in sample
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two one is full color,
the other is black and white.
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That is the only difference
between these two images.
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Let's see the file size
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of the full color image.
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We can see that the file size
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here is 2.9 megabytes.
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Now let's see the file size
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of the black and white image.
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This image is only 1.6 megabytes.
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Since black and
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white photos consist of a smaller
color spectrum.
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The file size is also smaller.
2960
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