Lesson 1
The 'Image' Species
Building blocks
Bitmap
On or Off
Raster
Pixels
Vector
Paths
Resolution Independent
Color modes
Grayscale
More than 50 shades of gray
RGB
Red - Green - Blue
cmyk
Cyan - Magenta - Yellow - blacK
HSB
Hue - Saturation - Brightness
Hue
Pureness of a color
Saturation
Vibrance of a color
Brightness
Lightness/darkness of a color
resolution
DPI/PPi
dots (or pixels) per inch
72 dpi
Anything on-screen
i.e. TV, monitors, phones, tablets
300 dpi
Anything printed
units of
measurement
pixels (screen)
inches (print)
how to readĀ
an image
Introducing the Histogram
Photoshop histogram
What am i looking at?
A graph
Representing the image
as a range of luminosity values
Spikes = large clusters of
similarly bright/dark pixels
a good histogram reading
a bad histogram reading
the best image
Has no extremes
Has no spikes
Has values throughout
the entire graph's range
diving right in
The adjustments palette
So many icons...
Don't let it intimidate you
Main ways to adjust
Brightness/Contrast
Levels
Curves
Exposure
Vibrance
Hue/Saturation
Color Balance
Black/White
don't worry
you're justĀ changing HSB
Hue - Saturation - Brightness
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