Scanners “The Computer as an Educational Tool: Productivity and Problem Solving” ©Richard C. Forcier and Don E. Descy

What is a scanner? Resembles photocopier Resembles photocopier Computerized image Computerized image Higher resolution = Better quality Higher resolution = Better quality Print or photos Print or photos

What is “resolution”? Two different numbers (1200 by 2400) Two different numbers (1200 by 2400) First number = Width First number = Width Second number = Length Second number = Length Dots per inch Dots per inch Smallest number most important Smallest number most important Interpolation Interpolation The higher, the better! The higher, the better!

Key Features Optical resolution Optical resolution Transparency adapter Transparency adapter Color depth Color depth Software Software Scanner type Scanner type

Scanner Types Flatbed Flatbed Handheld Handheld Sheet-fed Sheet-fed Drum scanners Drum scanners

Flatbed Features Scan negatives Scan negatives Scan photos Scan photos Scan word-processed text Scan word-processed text Variety of software Variety of software Sizes of photos Sizes of photos Printer Printer

Advantages MONEY! MONEY! Show off Show off No digital camera No digital camera Create your own photos Create your own photos

Disadvantages Quality Quality Loss of color Loss of color Higher resolution Higher resolution Uses a lot of room Uses a lot of room