Contents

IntroductionMany documents that are to be electronically processed contain barcodes to encode important information that is extracted via barcode decode software. There are a number of issues that should be considered when choosing a barcode symbology. The largest distinguishing characteristic to be considered is whether a linear (1D) or 2 Dimensional (2D) symbology is to be employed. 1D symbologies, as the name implies, typically consist of width modulated bars and space...

An Evaluation Of 2D Barcodes In Document Processing Applications

An Evaluation Of 2D Barcodes In Document Processing ApplicationsIntroductionMany documents that are to be electronically processed contain barcodes to encode important information that is extracted via barcode decode software. There are a number of issues that should be considered when choosing a barcode symbology. The largest distinguishing characteristic to be considered is whether a linear (1D) or 2 Dimensional (2D) symbology is to be employed. 1D symbologies, as the name implies, typically consist of width modulated bars and spaces that encode the user information. There is no information contained in the vertical dimension of a 1D symbol. 2D symbologies encode information in both dimensions of the symbol and as a result, have much higher data density. 2D symbols typically use a regular grid of possible cell positions, where a cell is either black or white.This article will focus on the use of 2D symbols in document processing applications because of the significant data density advantage of 2D symbols over 1D symbols. In particular, we will compare the relative merits of three popular public domain 2D symbologies: Data Matrix, QR Code and Micro QR Code. Following a brief overview of each symbology, we will compare them based on their data density, error correction, and relative processing speed.Data MatrixData Matrix symbols use a regular array of square cells ranging in size from a 10 by 10 grid up to a 144 by 144 grid. A 1 cell quiet zone is required around the entire symbol. In addition, rectangular sizes are also available. Each symbol consists of a fixed L pattern that is used for finding along with a clock track along the opposite sides of the L. In addition, there are internal clock tracks for larger Data Matrix. These fixed locations do not encode any information. They are present to identify the symbol as a Data Matrix and to aid the decode software. The remaining grid locations contain either a black or white squares depending on the information to be encoded.QR CodeQR Code symbols also employ a regular array of square cells ranging in size from a 21 by 21 grid up to a 177 by 177 grid. A 4 cell quiet zone is required around the entire symbol. To aid finding, QR Code symbols contain 3 finder patterns at 3 of the 4 corners. In addition, there are internal alignment patterns, clock patterns, as well as format information on larger symbols that gives the size of the code.For data applications that require smaller amounts of data, there is a derivative version of QR Code called Micro QR Code which can encode up to 35 numeric digits in less space than a corresponding QR Code. It has 4 different square sizes: 11 by 11, 13 by 13, 15 by 15 and 17 x 17. Each size requires a 2 cell quiet zone around the entire symbol. It contains only 1 finder pattern, with limited clock pattern and format information.Data Density and Error CorrectionData Matrix has a clear data density advantage over QR Code. This is especially true for smaller amounts of user data. This is due to the fact that it has fewer fixed cell locations. It does not devote as much space for finder patterns, and contains no format information. Micro QR Code was designed to address the data density issue and is comparable in size to the Data Matrix for this data content.All 3 types of symbols use Reed Solomon error correction to detect and correct errors due to symbol damage or imaging issues. The number of detectable and correctable errors is determined by the number of extra error correction codewords included in the symbol that are above and beyond the codewords used to encode the data.The data capacity of a given size symbol is a function of the amount of error correction overhead as well as the data itself. Data Matrix uses a fixed level of error correction that is not selectable by the user. The percentage of error correction codeword overhead ranges from 62.5% for the smallest symbol down to 28% for larger symbols. By contrast, QR Code has 4 different levels of error correction that allow an approximate recovery capacity of 7%, 15%, 25% or 30%. Micro QR Code varies the choices of the amount of error correction for each of the 4 allowable sizes. The smallest only allows error detection, while the largest allows up to 25% recovery capacity.The amount and type of user data will dictate the size of the symbol that is necessary. In addition, for QR Code and Micro QR Code, the amount of error correction used will factor into the size as well. The table below summarizes the relative size and error correction capacities of the 3 symbols shown above.Symbology -- Relative Size (with Quiet Zone) / Error Correction Overhead (%) / Maximum Correctable ErrorsData Matrix -- 1.00 / 58.3 / 3QR Code -- 3.70 / 65.3 / 8Micro QR Code -- 1.33 / 50.0 / 1The choice of the amount of error correction used in QR Code and Micro QR Code is application dependent. In situations where size is an issue, one may be tempted to reduce the amount of error correction overhead. This may reduce the overall read rate of the symbol if the barcode may be damaged or if the imaging environment makes it more difficult to get ideal images. Barcodes on soft packages that curve the symbol, as well as shiny tape over the symbol that can cause specular reflection back to the camera are examples of how codes may be damaged. In general, if space permits, for optimum read rates, one should normally choose the maximum allowable error correction capacity.Relative Processing SpeedIn real time applications where the time to decode an image is important, one must also compare the symbologies on how quickly they can be decoded. The most time consuming part of decoding a barcode within a large and busy image is generally finding the symbol. The more unique the finder pattern within a barcode symbol, the easier it is to locate within a busy image. This reduces processing time. Conversely, if a barcode symbology does not provide a unique finder pattern, more time will be spent looking for it.QR Code and Micro QR code have a significant advantage over Data Matrix because of the unique finder patterns within the symbols. QR Code is the best of the 3 choices because it includes 3 finder patterns, each being able to be used to find the symbol. Data Matrix has the L finder pattern and fixed clock lines. Unfortunately, these are not terribly unique patterns with forms where many areas of text are surrounded by boxes. In addition, both QR (Version 7 and above) and Micro QR Codes have format information within the symbol to let you know the size of the symbol and to confirm you are on a real symbol. Data Matrix does not contain explicit format data, providing only a clock track on the opposite sides of the symbol from the L corner.A busy form was scanned at 200 DPI, and a single instance of the 3 barcode symbols was added to the image with each symbol using 25 mil cells. Then in 3 separate passes, Volo, a barcode decode software toolkit from Omniplanar, was used to decode each symbol. In each pass, only one symbology type was enabled. The table below summarizes how long it took Volo to issue the decode result and completely finish processing the image. Both QR Code and Micro QR decoding were 3 to 4 times faster than Data Matrix decoding. This is almost entirely due to the good finder pattern in the QR and Micro QR symbols.Symbology -- Issue Time (msecs) / Total Time (msecs)Data Matrix -- 30.8 / 74.5QR Code -- 7.2 / 23.4Micro QR Code -- 7.6 / 21.9SummaryWhen deciding what 2D symbology type to use in document applications, one must consider data density, error correction and processing time. In applications where the size of the symbol must be kept to a minimum, both Data Matrix and Micro QR code are good choices. When processing speed is of primary importance, QR Code and Micro QR Code are both better choices than Data Matrix given their good finder patterns. In applications when both symbol size and processing speed are important, Micro QR Code is the best choice. However the largest possible Micro QR Code can only store 35 numeric digits with the minimum error correction (maximum of 3 errors). At the maximum error correction level, the data capacity drops to 21 numeric digits (maximum of 7 errors).

Notebook Or Desktop Computer, What Is The Best Buy?

Notebook Or Desktop Computer, What Is The Best Buy?

The idea of purchasing a personal computer may be appealing to a lot of people, however they may feel undecided as weather to go for a traditional desktop computer or for a light weight portable notebook. Several aspects should be taken into consideration as for the purposes of such acquisition. If the main purpose of buying a computer is for occasional use, regardless if it is for work or entertainment activities, one may consider buying a traditional desktop computer taking in consideration that its price is usually lower than the portable version.The maintenance and eventual upgrade of a desktop computer is also much easier to perform and less costly. If the buyer is looking to spend the least amount of money, definitely the desktop computer models offer more choices of finding better deals weather it is used or new. One may look around the local computer stores for special deals or may consider browsing the many possibilities offered online stores.Perhaps the greatest feature a desktop computer has is the fact that quite often it can be upgraded and personalized to suit the user needs without having to be sent back to the manufacturer. In most cases a local authorized computer store can perform the technical changes or upgrades to satisfaction. The desktop computers are meant for work and leisure as well and regardless of its configuration or how fast it can perform, it seems that it became an everyday tool of modern times.On the other hand, if the main reason for the purchasing of a computer is portability, then in this case the notebook will be the right choice. There are several brand names available on the market offering all kinds of configurations, from very basic up to the most sophisticated and powerful late models of notebooks. After a careful research on which model will better suit your needs, then you will still have the option to choose to buy a new, reconditioned or used unit for the sake of saving some money. Keep in mind that a reconditioned laptop purchased from a computer store, usually comes will full warranty, just like as if you had purchased a brand new model but for a much less cost.Just like any other purchase, it is important to do a careful research to find out what exactly your needs are and what are you going to do with it. The lightweight and portable notebooks are much nicer to carry around even though they are usually more expensive. Also the lightweight models almost always have a smaller screen and a more compact keyboard than traditional models of notebooks. So, in this case if weight is not a critical issue, than you may just consider to purchase a traditional regular-model notebook as long as it meets your requirements. If you choose this later option you will certainly be saving a great amount of money.If you are the kind of person who feels skeptical about purchasing a reconditioned computer, because it has been previously returned from the manufacturer, relax, some times there is absolutely nothing wrong with the returned unit. It may have just been a matter of model preference or some minor detail that didn`t quite match the previous owner`s preference. Keep in mind that a reconditioned notebook with a full warranty is just as good as a brand new one and maybe even better for the great discount it usually offers.Also you may find some good deals in refurbished notebooks. Beware that the difference between refurbished and reconditioned notebooks is that the former is usually an older notebook that has been used and then reconditioned, often by a third party, and the later usually means that it had some problem, went back to the manufacturer, got fixed and now it is available at a fair discount price with full manufacturer guarantee.The right solution for one`s computer related tasks, whether desktop or notebook, will depend mostly on one`s working or leisure needs. Search carefully for the best deals and avoid paying extra for accessories you will hardly use. Also take a look at reconditioned (full warranty) computers. The price will certainly surprise you. And the performance might too!Roberto SedyciasIT ConsultantThis article is under GNU FDL license and can be distributed without any previous authorization from the author. However the authors name and all the URLs (links) mentioned in the article and biography must be kept.

General Outlook Of A File Comparing Software

General Outlook Of A File Comparing Software

How are these file compare software so efficient? There are many advantages when you compare two files. You can avoid mistakes or come up with perfect and desired results when you "compare two files" . Apart from comparing two files, file comparing software also allow you to compare logical and physical drives, compound or alternate streams of files.Steps involved in comparing software. There is a common procedure in most comparison software when you are looking forward to compare two files.The foremost step that is involved when we compare two files is opening the object file that is referred as the primary one.The second step that is unique in different software is opening the windows used for comparison using Compare / Search command. After the search is over and a list of file is displayed, you can select an object file from the list for comparing with primary files. We call these object files as secondary. Secondary files can be both physical and logical.Block comparison while we compare two files. You can easily compare a small part of source file by specifying the exact starting addresses and the requisite block size. In case of active selection, some software pre-fills the required fields.It is an obvious mode when we compare two files. The striking feature is its interpretation of the empty areas. Empty offset address means lowest address that are usually considered zero. Empty size address means the remaining file.Result of Comparison. Most software has the results displayed in different colored blocks containing matching, differing and unique data separately. Generally, unique and differing ones are similar containing data absent in the primary file. However, unique blocks contain data that are not available in either of the files.Window used for editing after we compare two files. The window used for editing is displayed after we compare two files. The primary is displayed in top or the left pane while the secondary is displayed in lower or the right one depending upon the type of arrangement used.Primary and secondary files are treated in a slight different manner. Secondary is always in a read-only format. The reason for this limitation is that the secondary is not required for editing it is only used for comparison. It might be under application at the time of comparison or it can also be a system file. Attempting to open them for accessing might cause unwanted errors. However, this is considered the only restriction as you are allowed browsing them, defining data fields and bookmarks, copying, dragging, exporting data, and many more.Comparison Map. There are cases where the software contains comparison maps present left to the editing field showing the layout of the file and correspondence between different blocks in unique graphical forms. They are extremely beneficial especially when blocks of the files being compared are neither too large nor too small. It is an optional scheme for your benefit. You can use it or avoid it according to your needs.Comparison Pane. Comparison pane is also another option providing complete information relating to the layout of a file. There are two comparison panes present when we compare two files as each of them has a distinct layout.

Avoiding And Fixing Ipod Problems

Avoiding And Fixing Ipod Problems

Do you own an iPod? You may want to consider purchasing a few software programs that help recover and fix errors in files. Do you want to know why? Like computers, iPods are also susceptible to file losses and software crashes. Some common problems on an iPod are volume formatting and capacity error. There are times when the iPod will just stop working and freeze all its processes. Now when you try to reset the hardware by removing the battery, chances are your data may be lost.If you want to reduce the hassles of lost files and data recovery in your iPod, you are on the right track. Here are a few tips that may help you fix some common issues with the iPod.The knowledge of how to reset an iPod properly greatly helps when your iPod suddenly freezes and stops working. Resetting an iPod correctly greatly decreases the risk of data loss. What you can do is to plug in the adaptor to you iPod and then toggle the click wheel. Do this while holding down the switch and alternating it between on and off modes. If the iPod freezes, you may also consider clicking the Select tab and then the Menu simultaneously.Also, try to avoid overloading your iPod. If there isnt enough room in your iPod do not load any more files into it. Any device that is being pressured with something more than it can handle will inevitably crash. When your iPod reaches or exceeds its limit, you will be experiencing crashes and your iPod will just stop playing and freeze up.Always back up your files. Like computers, iPods tend to lose some data. So always be sure that you have copies of your files in your hard drive or in another external storage device.If you have lost important video, photo or music files in your iPod due to a crash, you may use file recovery programs. There are applications available online that are compatible with iPods. There are even file recovery programs made especially for iPods.If you are still experiencing difficulties with your iPod, you may want to approach a technician to help you solve your problem. If your iPod still qualifies for the warranty, then by all means use it. This will greatly help you save for the cost of repairs and materials needed to get your iPod back in shape.

Spyware Or Software: Your Business Guide To Must-have Software For 2007

If you use a computer, and run a business, then no doubt you have gone through, and may still be going through, the confusing time of deciding which technologies are actually important to your business.Is that latest program really going to help you, or are you going to find yourself spending more time trying to figure out how it works, or finding someone else who uses it.I present for your consideration, the definitive list of what software you should be using, to keep your business running smoothly and efficiently, who could pass that up!SkypeSkype is a program now used by over 9 million people worldwide, which allows free calling between skype users, including video calls, and ridiculously cheap calling rates to countries around the world.Skype has multiple options similar to what your phone company would traditionally offer (voicemail) and even has the skype in feature, allowing you to (for a monthly charge) have a landline number people can call, that routes into your skype program. This feature comes into its own when you are dealing with customers from different countries, as you can give them a local number, and save the toll calls.Skype helps your business because calls become clearer and significantly cheaper, saving thousands a year due to the reduced cost involved. If you have staff that move around then it becomes your lifeline, because your staff can be sending and receiving calls anywhere in the world with an internet connection, irrespective of landlines.Download Skype 3.0 Now - http://www.skype.com/download/ . Microsoft Office Outlook 2007Microsofts outlook is an email application from Microsoft, although most commonly used for emails, it also has a built in calendar, notes manager, and contact management.Outlook is a solid basis for any organization, and with an exchange server, Users can have a shared mailbox as well as individual, and with the centralized contacts manager, you never have to ask someone for those customers details again.With the new Vista edition, Outlook has gotten a system revamp, with a new snazzier finish, and a more intuitive design, Outlook is easier and faster to use than ever, making it a program no business can do without.Check it out now - http://office.microsoft.com/ . FirefoxFirefox is a graphical web browser increasingly being used as a replacement to Internet Explorer, with currently over 9 million people using it, it is becoming a strong player in the market.Firefox incorporates a lot of features that make web browsing easier, from an intuitive page search that searches as you type, to tabbing, allowing you to have one window open, but multiple web-pages open inside it, a feature other browsers have quickly tried to incorporate.Firefox is also significantly faster, and more secure, with a fix response time to security vulnerabilities as high as 3000% faster than Internet Explorer.Firefox helps your business run faster, more secure, and more flexible, advantages all around.Download Firefox 2.0 today http://www.getfirefox.com/ . McAfee Internet Security SuiteLets face it, the internet is a scary place, if it was a real place, it would be full of dark alleys full of dark figures, and everyones letterboxes would be overloaded with junk mail.McAfee Internet Security Suite combats this problem, by introducing a powerful suite of programs, including spam blocking, safe web browsing and antivirus.McAfee gives you 0 day protection for viruss, meaning that as soon as a virus is found and the protection created, it is sent out immediately, unlike other antivirus suites, that might update only once a week, leaving you unprotected if you receive the virus the day it is released.McAfee helps your business by keeping you protected against viruss, and notifying you of the dark alleys of the web, so you know not to go down them.Check it out now - http://www.mcafee.com/ .ProWorkflowHow can you keep track of everything these days, with all that paperwork to do, and those customers to ring, how could you possibly know what Johnson is doing down the hall? Because you have ProWorkflow, thats how!ProWorkflow is a project management and time tracking solution, that gives you the control to see what all the staff are up to, how work is progressing, and see upcoming tasks and projects, even allowing customers logins so they can see how far you are on their projects.And with the new Enterprise version, you can now manage your company worldwide, with the ability to submit projects to other locales through the click of a button.Sign up for a free trial today - http://www.proworkflow.com/ .Windows Vista Business EditionWindows Vista is the new operating system from Microsoft, with the Business Edition being the first operating system to be specifically designed for the modern business.With an overall upgrade to the look and feel of windows, getting things done becomes easy, no longer will you have the need to call tech support, or your expert staff member over again.And with new features, such as Windows Meeting Space, doing things with other people becomes a breeze.A must have for anyone that uses a computer for business.Check it out today http://www.windowsvista.com/ . Microsoft Office 2007Microsoft Office is a complete business system for creating and editing files, and even better, most businesss use at least some form of it, meaning you will practically never come across someone who cant read the file you just sent to them.Microsoft Office also integrates with your windows experience, merging with outlook, to provide you full Microsoft Word functionality when writing and receiving emails, and with the new Getting Started screen, you have plenty of pre-built documents ready and waiting to help.Microsoft Office is a must-have for anyone who uses documents, and lets face it, who doesnt! Whether its typing up a quick to do list, or preparing a professional report, Microsoft Office 2007 is your perfect companion.Check it out today http://office.microsoft.com/ . PageflakesPageflakes is your own personal start page on the internet, whatever business you are in, either personal or professional, Pageflakes will make your life easier.With Pageflakes, you login (email and password is all they ask for), then add a few flakes, basic web-based programs that do things from display you-tube videos with a keyword attached to them, to a to-do list, to a clock, add some RSS feeds with interesting content to maybe help you learn something new, and viola!You now have a homepage with content customized to you, where everything is relevant, and as an added bonus, you can access your content anywhere with a web browser and internet connection.Now thats smart business!Get started at - http://www.pageflakes.com/ . You-TubeWho doesnt know You-Tube? Exactly!You now have a branding space that basically everyone knows about and has visited at least once. This is the type of marketing space that advertising agencies dream about, and guess what, people go to you-tube to watch things, some of the most popular videos are advertisements, for example, a dove advertisement on the site has been played over 3 million times, and re-posted hundreds of times.All you need to do is record a video with something humorous, or thought provoking, or alternatively something to help your customers, such as a how-to video or insight in your field of business.Show it to some people, send it to some users, and so long as your video isnt boring, bland or otherwise, than you have just given yourself some (relatively) free advertising.Join the You-Tube revolution http://www.youtube.com/ .

Finding Hidden Files-Security Related Software

Utilizing security software for finding hidden files such as spyware, ad ware or viruses seems like a simple matter on the surface of things, but choosing between the multitude of software that accomplishes the task of "finding hidden files" can be difficult, as all manner of software accomplishes different tasks. In almost every security program there is a different type of software base that performs the essential function of finding hidden files on your hard drive or other digital storage medium. Each security program employs a different type of algorithm and software to perform the same basic and essential task, keeping out malicious software as well as any ad ware and viruses from potentially vulnerable and sensitive areas of your computer, such as the hard drive and other re-writable media.These vulnerable areas can be affected by malicious software and other types of damaging programs. Protecting your hard drive and digital content from viruses and malicious software is an essential function of software designed for effectively finding hidden files, as hidden files generally indicates that viruses or other malicious software might be present on your computer and needs to be eradicated.But selecting the correct software is not as simple as picking the first security related software designed for finding hidden files, as the different types and vast amounts of different applications requires some research by the user to sort out. Choosing between these complex software programs and deciding which one is most suitable for your application can be a time-consuming process and can actually be counterproductive for the user. Doing a quick search on Google can supply you with a tremendous amount of information regarding the software designed for finding hidden files on your computer but it can not choose which software best suits your needs. Using software that is designed for servers and large enterprises doesn't make sense for the home user, who might only need a light or even a trial version of the security software.Finding hidden files in a corporate environment of course is much more important, and it is worthwhile to use the top-notch, more expensive packages for finding hidden files in this type of enterprise network, as there can be little room for error and the additional options give IT managers an effective way to manage the operating system environment and their local area network operating systems and individual workstations. Detecting software that is specifically and maliciously designed to cause damage to the local computer and finding hidden files that are designed to elude detection requires specific and extremely focused applications that are designed for the task at hand and a variety of features and options to assist in the task of finding hidden files.With this in mind, it should be a simple task to locate the software capable of computer security on your computer at the best possible price and convenience to the user at any software retailer online or off.

Summary

IntroductionMany documents that are to be electronically processed contain barcodes to encode important information that is extracted via barcode decode software. There are a number of issues that should be considered when choosing a barcode symbology. The largest distinguishing characteristic to be considered is whether a linear (1D) or 2 Dimensional (2D) symbology is to be employed. 1D symbologies, as the name implies, typically consist of width modulated bars and space...