Digital Imaging

Digital Imaging and Scanning?

Think of them as electronic versions of photographs, printed text, and/or artwork. Every digital image is made up of dots called picture elements (pixels).

The process?

When a digital camera takes a picture, these dots are collected through a process called sampling and/or mapping. The pixels are stored on a disk-based media, or transferred to a computer for viewing/editing.

Simple? Well, it can be. While you may not need to know everything about digital production and "pixels", knowing a few of the basics may help.

• Every pixel is assigned a tonal value (black, white, shades of gray or color), which is represented in binary code (zeros and ones). The binary digits ("bits") for each pixel are stored in a sequence by the computer and are often compressed via a mathematical equation or algorithm which results in compression. When a picture is opened for display by a computer, the bits are read to produce an analog version for display or printing. [links lead to an online technology glossary]

Example:

• Resolution refers to how sharp and clear an image looks on screen or on paper, and how much detail you can see. It's usually determined by the number of dots (or pixels) per square inch (the more there are, the higher the resolution) and is used to describe printers, monitors, and scanners.
  
• Digital Darkroom - Programs for editing and manipulating digital images.

  

 

In this session, you will learn to create, manipulate and edit digital images. You will learn to about the various digital image file formats, and you will learn how to incorporate digital images in your teaching and web-related resources.

Topics Include:

• What is a Digital Image
• Hardware Choices
• Input/Scanning
• Digital Cameras in the Classroom
• Software: The Electronic Darkroom
• Basic Tools of Image Editing
• Digital Photography Tools & Techniques
• Introduction to ColorSync & Color Management
• Image Compression

Throughout this session, you can get help from the Help menu within all applications used in this presentation.

Tutorial used in support of this presentation.