Team Awesome

From WikiLangara

Image Creation

1. Stated simply, how do scanners work?

This is how a scanner works:

1. The user places the object (photo, drawing, document, etc.) he or she want to be scanned face down onto the glass.

2. Under the glass, a series of mirrors, lenses, lights and an image sensor move up and down the scanning surface.

3. The image sensor or picks up the differences in light and digitizes the data into a scanned file on the user’s computer.

2. What are six types of scanners discussed here? The most common?'

• The first type is flatbed scanners. Flatbed scannersare the most common and best selling scanner type because of their versatility, convenience, and availability.

• The second type is sheetfeed scanners, which are designed for high-volume business settings.

• The third type is drum scanners that produce the highest resolution. Also, these scanners are relatively expense, difficult to operate, slow and not suitable for fragile documents.

3. Name four considerations about the computer attached to the scanner it's important to keep in mind.

Four things to keep in mind when considering the computer attached to the scanner are:

• Make sure that the computer is adequate RAM. The site recommended 512 MB, but there needs to be more if the computer is going to be used to save images
• Make sure that the computer`s mass storage capabilities are quick and spacious. Even if you are moving the files to other storage devices, you must ensure that you have enough temporary room (40-60 GB)
• Make sure that you have a speedy CPU (central processing unit). The recommended minimum is 1.8 Ghz Pentium IV (or compatible) or 800 Mhz G4.
• Make sure that the scanner you want is compatible with your operating system. As some scanners do not provide software drivers for Mac, and some are platform-specific, you must look into this before choosing a scanners. Sometimes, there are outside options that can supply the right software drivers, but it is important to check if the scanner is platform-specific.

4. What does Scaling mean? OCR?

“Scaling” describes the process of producing derivative versions of an object without re-scanning the source document, often used when delivering images via the Web. Scaling can be accomplished by re-sizing, through bit depth reduction or any number of steps which reduce resolution (size) while considering screen interference, with the goal of creating an object with a minimum of visual “noise” (e.g. moiré). The processes (filters, re-sizing, bit-depth reduction, etc.) used to accomplish scaling will affect image quality.

"OCR" stands for Optical Character Recognition – through the use of software in concert with the scanning hardware, the transformation of scanned images of text into computer-readable characters. Ensures that scanned text documents can be searched and indexed.