Adobe Photoshop 7'0 Design Professional

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Chapter Lessons
OVERVIEW

• Correct and adjust color
• Enhance colors by altering saturation
• Modify color channels using levels
• Create color samplers with the Info palette

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Enhancing Color
INTRODUCTION

• Use color-enhancing tools to change the mood or
  personality of a color by changing its tonal
  values
• Tonal values (also called color levels)
• Numeric values of an individual color
• Used to duplicate a color

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Reproducing Colors
INTRODUCTION

• Use color adjustment tools to specify exactly how
  colors should appear when printed
• Colors levels are modified by making adjustments
  to the input and output levels

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Correct and Adjust Color Making Color Corrections
LESSON 1

• Balancing color
• Add and subtract colors from those already
  existing in a layer
• Correct oversaturated or undersaturated color
• Remove color casts from an image

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Color Balance Dialog Box
LESSON 1

• Contains three sliders
• Cyan-Red
• Magenta-Green
• Yellow-Blue
• Adjust colors by dragging sliders or typing
  values in the Color Levels text boxes

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Modifying Curves
LESSON 1

• Use the Curves dialog box to alter the output
  tonal value of any pixel input
• Change as many as 16 points along the 0-255 scale
  in the Curves dialog box
• Horizontal axis original intensity values (Input
  levels)
• Vertical axis modified color values (Output
  levels)

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Curves dialog box
LESSON 1
Active Setting
Values for Active Setting
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Analyzing Colors
LESSON 1

• Create an adjustment layer
• Experiment with color corrections
• Adjust the color sliders and view changes to the
  image
• Modify the curves

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Variations Dialog Box
LESSON 1

• In the Variations dialog box, view thumbnails of
  color variations while making color adjustments

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Enhance Colors by Altering Saturation
Understanding Saturation
LESSON 2

• Purity of a particular color
• The higher the saturation level, the more intense
  the color
• Modify color saturation using
• The Hue/Saturation dialog box
• Sponge tool

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Using the Sponge Tool
LESSON 2

• Use to increase or decrease the color saturation
  of a specific area within a layer
• Sponge Tool settings include
• Brush size
• Saturation or de-saturation levels
• Speed with which the color flows into or from the
  Sponge Tool

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Saturation Example
LESSON 2
Reds Saturated
Before
After
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Understanding Hue
LESSON 2

• Hue is the amount of color that is reflected from
  an object
• Assigned a measurement from 0 to 360 degrees
• Described in terms of tints or shades (red,
  yellow-green, blue, gold, etc.)

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Adjusting Hue/Saturation
LESSON 2

• In the Hue/Saturation dialog box use the
  following sliders
• Hue
• Saturation
• Lightness

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Converting to Grayscale
LESSON 2

• Use the Hue/Saturation dialog box to apply
  grayscale tones to an object in an image

Object in Grayscale
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Modify Color Channels Using Levels Using Levels
LESSON 3

• Use the Levels dialog box to make adjustments
  across a tonal range
• Uses the composite color channel or individual
  channel
• The Levels feature uses a histogram and displays
  light and dark color values on a linear scale

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Histograms
LESSON 3

• A graph that represents the frequency
  distribution of colors in an image
• Adjustments are made to the input and output
  levels
• Plotted data indicates the total number of pixels
  for a given tonal value

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Levels Dialog Box
LESSON 3
Histogram showing plotted data
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Sliders
LESSON 3

• Levels dialog box contains six sliders that are
  used to make color adjustments
• Shadows slider
• Midtones slider
• Highlights slider
• Output shadows slider
• Output highlights slider

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Create Color Samples with the Info Palette
Sampling Colors
LESSON 4

• Use the Color Sampler Tool to sample and store up
  to four distinct color samplers
• Apply each of the four color samples to an image
• Use the samplers to make color adjustments

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Color Samplers
LESSON 4

• Each sample represented by a number

Sample 1
Sample 2
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Info Palette
LESSON 4

• Displays the following information
• Actual color values for current color mode
• CMYK values
• X Y coordinates of the pointer location
• Width and height of a selection
• Info palette expands to show color measurement
  information when a color sample is created

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Info Palette with Color Samplers
LESSON 4
RGB Color Values
CMYK Color Values
Pointer Coordinates
Width Height
Color Samplers
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Manipulating Color Samplers
LESSON 4

• Move a color sampler by dragging the sampler icon
  to a new location
• Color value information is updated in the Info
  palette
• Delete any of the samplers

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Chapter 10 Tasks
SUMMARY

• Use tools to make color corrections
• Balance colors
• Modify curves to alter output tonal value
• Understand and modify hue and saturation
• Use the Levels dialog box to correct shadows and
  highlights
• Sample colors and use the Info palette