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Yerboogieman
Nobel Prize Winner
USA
577 Posts |
 Posted - Oct 06 2009 : 12:54:52 PM
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An optical scanner, or just scanner, is a light-sensing input device that reads printed text and graphics and then translates the results into a form the computer can use. A scanner is similar to a copy machine except that it creates a file of the document instead of a paper copy. The file that contains the scanned object then can be stored on a disk, displayed on the screen, printed, faxed, sent via electronic email, or included in another document. For example, you can scan a picture and then incorporate the picture into a brochure using a desktop publishing program.
When a document in scanned, the results are stored in rows and columns of dots called a bitmap. Each dot on a bitmap consists of one or more bits of data. The more bits used to represent a dot, the more colors and shades of gray that can be represented. For instance, one bit per dot is enough to represent simple one-color images, but for colors and shades of gray, each dot requires more than one bit of data. Today’s scanners range from 24-bit to 45-bit, with the latter of a higher quality, but more expensive.
The density of the dots known as resolution typically is measured in dots per inch or DPI. It is stated as the number of columns and rows of dots. For example, a 600x 1200 DPI scanner has 600 columns and 1,200 rows of dots (Climber and Morton 134). If just one number is stated, such as 600dpi, that number refers to both the number of rows and the number of columns. The more dots, the better the resolution, and the resulting images are of higher quality.
Some manufacturers refer to the actual scanned resolution as the optical resolution, differentiating it from enhanced or interpolated resolution. The enhanced resolution usually is higher because it uses a special formula to add dots between those generated by the optical resolution.
Most of today’s affordable color desktop scanners for the home or small business user have an optical resolution ranging from 300 to 2,000 dpi (chilly Cashman Series Microsoft Word 2002 Project 2). Commercial scanners designed for power users range from 4,000 to 6,000 dpi. There are three basic types of scanners: flatbed, sheet fed, and drum.
Organizations use many types of scanners for image processing, or imaging, which consists of capturing, storing, analyzing, displaying, printing, and manipulating images or bitmaps. Imaging enables organizations to convert paper documents such as reports,
memos, and procedure manuals into an electronic form (Walters 57-59). Once saved electronically, the routing of these documents can be automated. They also can be stored and indexed using an imaging processing system.
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If you don't have the time to do it right, when will you have the time to do it over? |
Edited by - Yerboogieman on Oct 12 2009 1:04:15 PM |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Oct 07 2009 : 10:12:49 AM
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| Informative, but what is it? |
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Yerboogieman
Nobel Prize Winner
USA
577 Posts |
Posted - Oct 11 2009 : 7:17:43 PM
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quote:
Originally posted by Aaron Cake
Informative, but what is it?
It's for my Computer Apps class. |
If you don't have the time to do it right, when will you have the time to do it over? |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Oct 12 2009 : 10:24:04 AM
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| And why is it here? |
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Yerboogieman
Nobel Prize Winner
USA
577 Posts |
Posted - Oct 12 2009 : 1:10:39 PM
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| They don't allow me to print. They block most options for me because I have gotten into some trouble on school computers in the last few years. For example, I am no longer allowed to log on for any other period except 3rd, use any external data devices, get on the internet (but as you can see, I got past that), etc. The list goes on. |
If you don't have the time to do it right, when will you have the time to do it over? |
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boron
Mad Scientist
Canada
223 Posts |
Posted - Oct 12 2009 : 6:05:52 PM
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| Huh... makes me wonder what you did to have that many restrictions... |
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Yerboogieman
Nobel Prize Winner
USA
577 Posts |
Posted - Oct 12 2009 : 11:31:21 PM
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quote:
Originally posted by boron
Huh... makes me wonder what you did to have that many restrictions...
My defense was "Using the security flaws to my own advantage." They had no proof, they said I was getting on Myspace, "destructive web pages" and "uploading key loggers and Trojans". They printed out screen shots, every single one, had the same exact time stamp.
For some reason, they kept thinking I was stealing computer mice. |
If you don't have the time to do it right, when will you have the time to do it over? |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Oct 18 2009 : 10:53:36 AM
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When I was in highschool, I got in trouble for "hacking" for doing the following on various occasions:
- Dropped into a DOS prompt to make some subdirectories under my home directory
- Changed my desktop wallpaper
- Enabled TCP/IP so I could use the Internet without requesting the "special boot disk" as there were only 10 of these disks for the whole school
- Using VNC to control my machine at home
- Working on my programming assignment on one of the computers in the library (!!!)
- Sitting in the library, working on my website, on my own laptop
- Copying and pasting a few URLs into my own website in the library so I could look at them later at home
Many of these incidents circle around the library, and it is no small coincidence. The librarian (a guy in his mid 30s, widely considered to be gay...this is significant because it was a Catholic highschool) was the most un-tech-competent person I have seen. To him, anything he didn't recognize on the Internet was "chatting", and since "chatting" was not allowed, he'd throw a fit and do things like just cut the power to the whole row of the computers if he suspected someone of "chatting". |
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wasssup1990
Nobel Prize Winner
A Land Down Under
2261 Posts |
Posted - Oct 18 2009 : 11:38:13 PM
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Gay librarian? Hehe, same at my highschool.
Oh yeah, just thought you find this funny.
A teacher at my university told the class that some guy (who I didn't know) downloaded 60GB of porn using the Internet connection there and got busted.
One of my friends at Uni thinks it's normal to watch porn videos & pictures in class where everyone can see him. LOL! Luckily he mutes the speakers. |
When one person suffers from a delusion it is called insanity.
When many people suffer from a delusion it is called religion. |
Edited by - wasssup1990 on Oct 18 2009 11:45:47 PM |
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Yerboogieman
Nobel Prize Winner
USA
577 Posts |
Posted - Oct 19 2009 : 1:11:47 PM
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| My brother got in trouble for doing about the same things as you. Except for the laptop thing. He used Logmein to get on his computer at home. |
If you don't have the time to do it right, when will you have the time to do it over? |
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Yerboogieman
Nobel Prize Winner
USA
577 Posts |
Posted - Oct 19 2009 : 1:13:29 PM
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| I guess everything happening on a computer is hacking. |
If you don't have the time to do it right, when will you have the time to do it over? |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Oct 20 2009 : 09:25:55 AM
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The porn thing is hilarious. I've always figured that I was ever riding in a van with one of those DVD players visible from the back window, I would put on the nastiest porn possible and just look at the reactions from other drivers.
On the other hand, the lack of knowledge shared almost universally by highschool teachers regarding computers is downright depressing. I'm sorry, but if you don't know the basics of computers, you are not qualified to teach. Then again, what's that phrase? "Those who can do, do. Those who can't do, teach." |
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Smashley
