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W220 – Technical Issues in Educational Computing

W220 – Technical Issues in Educational Computing. Digital Imagery. Concerns . Storage (film) Resolution Features Flash Tripod socket Movie mode …. Memory. Compact Flash Compact Flash Type II Smart Media xD Picture Card Memory Stick Memory Stick Pro CD-R Disk SD/MMC Card

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W220 – Technical Issues in Educational Computing

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  1. W220 – Technical Issues in Educational Computing Digital Imagery

  2. Concerns • Storage (film) • Resolution • Features • Flash • Tripod socket • Movie mode • …

  3. Memory • Compact Flash • Compact Flash Type II • Smart Media • xD Picture Card • Memory Stick • Memory Stick Pro • CD-R Disk • SD/MMC Card • Floppy Disk

  4. Resolution • Mega pixels • >1 • 1 • 2 • 3 • 4 • 5+

  5. Resolution • Color Depth • 8 bit depth – 256 hues • 24 bit depth – 16 million hues • 72 DPI • number of pixels displayed by a computer screen • X Y dimension • Absolute size of the image • 8 x 10 @ 300dpi = 4 x 5 @ 600 dpi

  6. Optical Photographic technology Image magnified before reaching the CCD Digital Electronic technology Image magnified after reaching the CCD Electronic cropping Appears to enlarge image Loose pixels (resolution) Zoom – optical versus digital

  7. Speed (to the desktop) Resolution Convenience Tonal / Color range Sharpness Color reproduction Purchasing Cost Per Image Cost Flexibility Digital Film Digital Film Film Film Digital? Digital Film Digital versus Film

  8. Hands on… • Nikon N80 • Canon Elph S230 • Sony Mavica • Canon ?

  9. Questions…

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