Preparing Quality Images for Computer Networks
- by John P. Weise
- The University of Michigan
- School of Information and Library Studies
Table of Contents
- Limitations of Different Image Forms
- Components of Digital Image Quality
- Perspectives on Digital Image Quality
- The Copyright Holder and/or the Image Creator
- The Subject Matter Expert
- Summary: Emphasizing Image Quality
- Common Factors That Affect Data Transfer Time
- The Transfer Rate
- Table: Typical Data Transfer Rates
- The Quantity of Data
- Network Traffic
- Throughput Speed of Storage Devices
- Summary: Data Transfer Time
- Purpose
- Objectives
- Define the Essential Terms
- Provide a Framework...
- Bitmapped vs. Object Oriented Images
- More About Bitmapped Images
- Resolution
- Image Size
- Color Depth
- Table: The Number of Colors Available at Common Bit Depths
- Calculating Image Data
- Summary: Bitmapped Images
- Displaying the Image on a Computer Screen
- Scaling the Size and Resolution
- Color Reduction (Quantization)
- Dithering
- Advantages of Color Reduction and Dithering
- Disadvantages of Color Reduction and Dithering
- Introduction
- Goal
- Objectives
- Techniques for Reducing Bitmapped Image Data
- Purpose
- Approach
- Reducing Resolution
- Overview
- Advantages
- Graph: Affects of Resolution on Data
- Disadvantages
- Image Cropping
- Overview
- Advantages
- Disadvantages
- Reducing Color (Bit) Depth
- Overview
- Advantages
- Disadvantages
- Is Color Really Necessary?
- Image Data Compression
- Overview
- Advantages of Lossy Compression
- Disadvantages of Lossy Compression
- Advantages of LossLESS Compression
- Disadvantages of LossLESS Compression
- Introduction
- Image Compression
- Lossless versus Lossy
- JPEG Lossy Compression
- JPEG File Formats
- PICT & JPEG
- TIFF & JPEG
- Encapsulated PostScript & JPEG
- GIF & JPEG
- Other Sources of JPEG Information