by john taylor on January 11, 2012 10:22:30 AM The fundamental principle on which barcode readers work is to examine an image and process it in various manners. Capturing image and text procedure so called OCR (optical character recognition) enables you to store corresponding data to a file or folder on your computer system. With this information, you can easily use it for several purposes like for printing, for modifying or for implementing on your own web page.
Barcode scanner or reader mainly consists of three components:
1. Illumination System
2. Sensor or Converter
3. Decoder
The process of scanning starts when red light is illuminated on encoded data. Sensor senses the reflected light from the illumination system and produces an analog signal with different voltage displaying the reflection intensity or lack of intensity. The converter is responsible for altering the analog signal into a digital signal for the purpose of decoding. After that decoder interprets digital signal, perform mathematical or arithmetic computations to verify that barcode is decipherable, changes it into ASCII text, arrange the text and transfer it to the computer to which the scanner is referenced.
Description of Barcode Scanner parts
1. Illumination System
The illumination system is the technique through which black bars and white spaces are illuminated. Most generally used illumination systems are as the following:
• Single Point LED
This technology uses barcode wand reader and barcode slot reader. The illumination of the barcode arrives from individual or pair of LED’s and is centered by a single ball-type opening. In this technology, ball is used to actually touch the barcode used for scanning.
• Linear Multiple LED
In Linear Multiple LED, batch LED’s are placed in a line provides facility to light the complete width of the barcode image. This technology is mainly acceptable in CCD scanners and Linear Imagers.
• Laser
Laser technology implements a single point red laser diode which seems like a laser pointer.
2. Sensor or Converter
Sensor is used to detect red light reflected form the illumination system and creates an analog signal having several sized employed to show lack of intensity or reflection intensity. The converter is implemented to change analog signal to digital signal so that it is easily decoded into useful information.
3. Decoder
Decoder understands digital signal code, carries out arithmetical computations to authenticate whether barcode is decipherable or not, transformed it into ASCII text, customize text formatting and transmit it to the computer system to which the scanner is attached.
Barcode Generator can print 26 fonts of barcode and these barcodes can be scanned.
Barcode generator software can create Barcode Label (http://www.bestbarcodegenerator.com/blog/barcoding/barcode-labels/) of different formats and different Barcode Symbologies (http://www.bestbarcodegenerator.com/blog/barcoding/barcode-symbologies/) . Read more |
by Kim Sanders on December 23, 2011 02:27:20 AM For parents who need Mac monitoring software, Aobo keylogger for Mac offers the best solution.
"My daughter got a MacBook for her birthday (my ex-husband's idea). Is there a way to find out where she goes online? One of my friends told me that there is some spy software for Mac OS X. It has the capability to record keystroke/captures Screen Shots and save it to a log file. Is it true?" asked by Amey, a mother of a 14 year old daughter.
Definitely it is true. There is spy software for Mac OS X- Aobo keylogger for Mac to effectively monitor children who are using Mac computer. Aobo keylogger for Mac is a Macintosh monitoring solution which is most used to monitor users using Mac computers.
After Aobo keylogger for Mac has been installed, it will record each single keystroke and websites visited in any browsers. Aobo keylogger for Mac additionally takes screenshots continuously and sends logs reports automatically to your Email so that you do not need to do anything besides sitting back and see the logs, clearly presenting you what your little kids are doing with their Mac.
Not so long ago, I saw someone in Yahoo! Answers asking about if anyone can suggest keylogger for Mac software that is believed to be stealthiest. He said he was testing keylogger for Mac and so far there was no keylogger for Mac that can work under anti-virus programs. Actually, there is a keylogger for Mac that is able to get around anti-virus. It is called Aobo keylogger for Mac.
Having been tested many times, Aobo keylogger for Mac, with the full-scale features of keylogger, is approved to be undetectable by most of the anti-viruses, including the powerful Kaspersky. Aobo keylogger for Mac is not a keylogger virus. That is why it cannot be detected by anti-virus. While many keyloggers may leave icons in the Dock, Aobo keylogger for Mac is invisible from Dock and Menu Bar. Therefore, nobody will notice that a piece of monitoring software is running in background. In addition, with the built-in transferring feature, this keylogger for Mac can secretly send the monitoring logs to your E-mail.
If you are searching for a stealthy monitoring program, Aobo keylogger for Mac is at your service. After being installed onto a certain Mac computer, it will stay completely undetected and hidden. Take it easy to use it as it cannot be detected and removed by anti-virus.
As a parent, you will know what is best for your child. Take a look at Aobo keylogger for Mac. Besides the above impressive features, it also records the passwords. If you have any interests in the best Macintosh keylogger, have a try for its three day free trial: http://www.parental-controls-software.net/ Read more |
