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DIGITAL IMAGES

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BOTH "GIF" AND "JPEG" FORMAT FILES ARE BASED ON DIGITAL APPROXIMATIONS OF IMAGES OBTAINED BY "SAMPLING" THE COLORS OF THE ACTUAL IMAGE.
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Williams College
Department of Computer Science
This page is part of a section of lecture slides related to " Digital Images " within the topic "Using and Understanding Digital Images". Other slides within this section and other sections of slides for the topic "Using and Understanding Digital Images" can be accessed using the links below.
  • Basics of HTML Image Tags
  • Images
  • Digital Images
  • DIGITAL IMAGES
  • PAINT BY NUMBER
  • DIVIDING INTO PIXELS
  • SAMPLING WITHIN PIXELS
  • PIXEL RESOLUTION
  • Why GIF? Why JPEG?
  • "RGB" COLOR
  • WHY 255?
  • 24-BIT COLOR
  • A STATISTICAL ANALYSIS OF "GREEN EGGS AND HAM"
  • KEEPING THE DIGITS IN DIGITAL
  • LOW-FAT EGGS AND HAM
  • 8-BIT COLOR
  • 8-BIT VS. 24-BIT
  • "LOSSLESS" COMPRESSION TECHNIQUES
  • "LOSSY" COMPRESSION
  • HTML Color and Image Options
  • SNOW "FFFFFF" AND BASIC "000000"
  • HTML COLOR ATTRIBUTES
  • OPTIONAL ESSENTIALS
  • VERTICAL IMAGE ALIGNMENT
  • HORIZONTAL IMAGE ALIGNMENT
  • LINE BREAKS