Purdue School of Engineering and Technology

Purdue School of Engineering and Technology

Raster Imaging for Computer Graphics

CGT 21100 / 3 Cr. (2 Class, 2 Lab)

Digital images are produced using a variety of computer technologies. Advanced color theory, surface rendering, and light control are emphasized in relation to technical illustration, hardware characteristics, and software capabilities.

  • Adobe Photoshop
  • Students preference downloads

Course Outcomes (What are these?)

At the conclusion of this course, the student will be able to:

1.   Develop an advanced understanding of raster graphics (CGT i)

2.   Understand current editing techniques (CGT i)

3.   Understand how color theory is applied to images for technical and social effect (CGT e & i)

4.   Develop a working knowledge of Adobe Photoshop in regards to reality, social perception, and technical expertise (CGT e & i)

CGT Student Outcomes (What are these?)

(e)  An understanding of professional, ethical, legal, security and social issues and responsibilities

(i)  An ability to use current techniques, skills, and tools necessary for computing practice

  • How Raster Imaging Works: Pixels Make the World Go Round!
  • Understanding Photoshop’s Interface and Layout
  • Opening an Existing Image/Starting a New Image
  • Copying Background Images
  • Raster Image File Formats
  • Using Layers
  • Image Adjustments
  • Image Enhancement Techniques
  • Image  Restoration Techniques: What to Save and What to Toss!
  • Image Alignment
  • Using Filters to Create Textures
  • Masking
  • Wrapping Images on 3D Objects
  • Scripting
What You Will Learn

1. Understanding Raster Imaging and How to Make Proper Graphical Decisions

  • Demonstrate a working ability to make tool selections from the software’s interface by using menus, icons and hotkeys
  • Demonstrate the proper use of the following tools and techniques: Zoom and Pan (Moving Around in Space), Eraser, Rectangular Marquee and Lasso, Cut and Paste Layers Magic Wand
  • Demonstrate how to map out operations on an existing image that is being edited

2. Capturing Digital Data Effectively

  • Demonstrate diverse techniques sued to capture data in a raster image
  • Demonstrate the proper use of the following tools and techniques: Changing Colors, Cropping Images for editing and production, Transformations (CTRL-T) and Using GRIPS, Clone Stamp, Selecting appropriate File Formats, Selecting Images using other marquee options

3. Using Imaging Alteration Techniques Appropriately

  • Explain clearly how to layout steps to alter or edit existing raster images so that data that is preserved and work time is reduced for cost savings
  • Demonstrate the proper use of the following tools and techniques: Using Color Palettes and Setting Brushes (Diameter and Hardness), Elliptical Marquee, Adding Shadow Effects, Selecting and Placing Text, Adjusting Layers (Flatten), Adjusting Hue and Saturation, Working with Perspective Alignment, Correcting camera lens distortion

4. Applying Photo Manipulation and Restoration Techniques

  • Explain what data in a historical image is important and should always be preserved
  • Demonstrate techniques for preserving and also purging color from a photo
  • Demonstrate the proper use of the following tools and techniques: Patch, Blur, Sharpen, Smudge, Dodge, Burn, Sponge, Healing Brush, Spot Healing Brush

5. Using Advanced Filtering and Masking Techniques

  • Properly describe techniques used in creating texture’s, the use of clipping masks, and adding custom scripts for repetitive tasks
  • Demonstrate the proper use of the following tools and techniques: Selecting and Applying Filters in the Creation of Textures, Apply Clipping Masks, Writing Scripts for Time and Cost Savings