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).

How To Send SMS Text Messages Online For Free

How To Send SMS Text Messages Online For Free

Mobile phones, undoubtedly, can be labeled as the greatest invention of modern times. They make our life easier with their countless advantages, one of which is the highly effective SMS or Short Messaging Service. SMS is the general term for the technology which provides people with the ability to send and receive text messages via mobile phones.With recent technological advancements, free international sms messages can now be sent on a global level anywhere in the world through many online service providers. And the best part is that you dont even need a "mobile phone" if you have a computer. You simply register with the desired information on any of the sites that offer free SMS service and just follow the simple instructions. There is a space for the mobile number of the recipient, as well as space for the message. It depends on the free sms provider, but usually, the maximum number of words allowed is generally fixed at 137 characters. However, some India sms providers allow even more than this. SMS messages can include words, numbers or any alphanumeric combination. Also, binary format is usually supported.Some "free sms" service providers offer many additional services to senders, such as delivery confirmations or replies. This way, you'll be able to track your sent messages and see when it gets received. Also, if you opt for replies, the recipients can even reply back to you. This two-way sms communication without spending a dime is possible only through a free SMS service provider on the Internet.Considering the fact that you usually have to pay to send SMS, sending free, international SMS through online sms service providers is a great, quick way to communicate with friends and family. For example, In the United Kingdom, messages cost 0.10, and with people sending tens of messages each and every day, costs can mount up.Also, writing a text message using your cell phone just takes too long compared to using your keyboard. Even on the most modern mobile phones with advanced predictive text messaging, it can be very difficult and time-consuming to write a message. Just think how quick it is to type a message on your computer keyboard, it is much quicker than using your mobile phone.Being free, some messaging services are reliable, some do not work at all, and others are very slow. Also, many services will add and advert to the bottom of your message, although this does not cause much problem, for, it does reduce the number of allowed characters.Be very careful when registering for a free SMS service. Not all are as free as they claim to be, some send chargeable sms messages to your phone, making the service rather expensive.

Digital Slr Photography And You

Digital Slr Photography And You

Digital cameras have been around for a number of years. If the individual has a lot of fun using it, perhaps it is time to move up by investing in something better that is available in the market. Technology has paved the way for the creation of the digital SLR camera.The SLR stands for single lens reflex. In fact, many photographers have decided to use this more often. This is because it gives the user more control in the look of the final product.When the SLR first came out, this was sold at about $5,000 a piece. With the increasing demand in the market, manufacturers have came out with different models so the average person can buy one of these for less than a thousand. Those who want to do better with the more affordable version then will have to buy extra lenses.The SLR stands out because of the lens used in the camera. This just proves that the piece of glass in this device really makes a difference when the pictures are developed. The user can change the lens to get a farther shot but this will really boil down to the contrast and color.Another nice feature about the SLR is that it comes with controls allowing the owner to change certain things in the photo before it is downloaded and printed. This may be complicated for those who are not familiar with it so the user should get comfortable with the camera before using it.Since the SLR is quite expensive, it will be a good idea to get proper insurance for it. This device fetches a good price in the market if someone should stumble into one which will really hurt anyones pocket should this be stolen.There are many brands of SLR cameras in the market. All of these manufacturers have been in the business for quite some time, which makes it hard to recommend which one is the best to invest in.Photographers and other hobbyists then should go with the brand that the individual is familiar with and use this to get those digital SLR shots. After all, this is the only way to use this piece of equipment and get the moneys worth out of this investment.The owner should also know how to store and clean the SLR camera. It is only with proper maintenance and storage that excellent shots can be taken every time this is brought out.

Discovery The 3 Basic Fundamentals Of Computer Speed

Discovery The 3 Basic Fundamentals Of Computer Speed

So let's talk about the 3 basic fundamentals of computer speed those 3 basic fundamentals are connection hardware and software. These areas are all there really is to the slowing down of "computer speed" or more importantly the speeding up of your computer. Your computer speed stops and slows down when you have a bad connection or when you have slow or old or bad hardware orwhen you have software that is some how not optimized properly or that in not running properly or that just takesup too much of your computer memory reserves. So those arethe 3 areas that are the fundamentals of computer speed.They are where your speed comes from and they are where your speed falls apart. Looking at fundamentals and knowing these fundamentals make it easier for you to understand and just how to improve computer speed. This brings out one of the missing links and opens up one of the biggest problems when it comes to computer speed and that is most of the people addressing computer speed are only looking at one of these areas.When I looked for the fundamental of computer speed using a research technique called the stable datum I found that there is really nothing else in a computer that you can repair other than hardware, software, or connection to the internet. So, those are the areas you want to start to look at when you want to improve computer speed.This method makes it very easy to know what to do. Obviously the first thing to start with is hardware and unlike the others you really cannot tweek hardware that much. It can be done to some degree but really the way you would improve hardware is to get a more up-to-date or more efficient or faster piece of hardware. Sometime just a newer way of create a simple hardware tool will greatly improve you computer repair experience.You can do things like get a better keyboard or a better mouse a bigger hardrive a more advanced mother board anything more improved so to speak. And as we all know things get improved at the speed of light on the internet. So thats pretty much all you can do with hardware.Next thing we want to talk about here is software and software is a whole different thing because software is the brain of the computer. Software is what makes the computer do things. It is vital to have hardware but nothing very exciting happens until you fire up the software. We may as well start with the basic piece of software and that is Windows XP and all of the software pieces that go along with Windows XP. These are the items that you will need to be tweeking and this includes XP itself, Internet Explorer, & Microsoft Outlook. This also includes the way Windows XP load onto your computer during the start up process. Those are the first areas you will have to optimize to get any speed.Now one of the things that make this seem more complex than it is there is always a dozen ways to do one simple thing on XP. Programmers do things one way hackers do it another way and a researcher like me I just try to find the safest and easiest way to the same end result. Just knowing the fastest way find or do a task on your computer can speed up your computing experience in a way you probably never thought of.What you will find is that many of the default or out of the box ways that Windows XP does tasks can be changed in order to give you more speed and performance. Windows standard setting are often set very broad and general. When focused just a little you get tons more speed.Now you can either do these adjustments yourself or you can buy software that makes the setting adjustments for you. I recommend you do both because some adjustments are way too simple to pay for and others are way too complex to risk doing yourself.There is also the reverse of this when we are talking about software as a fundamental of "computer repair" . Some of the time your computer has software on it that needs to come off because it is the source of the loss in computer repair itself. This is where spyware removal software and anti virus software become valuble. You definately want to take a look at this kind of software& improve the ones you have on your computer. A high price does not mean high quality either.Connection is the next thing that we want to talk about. Connecting to the internet is how most of us do much of our work with our computer. So if you have terrible connection speed or if your service is not fast or if the modem you are using in not good. So you immediately see that you can do a lot to speed up your computing by change and improving the things that connect you to the internet.A satellite T-1 connection is about the fastest but I prefer cable because it is not affected by weather. Cable is awesome because it is very stable and I have been using it for year now and it out performs most alternatives. DSL on the phone lines is your next best choice if cable is not available. Just try to get the fastest service you can.Connection speed is also dependant on the software that is used to connect to the internet service that you use. We have found that you can do software adjustments to Windows that optimize the browser and the email usage of the connection services. Doing these simple adjustments can improve a service dramatically. My cable connection operates at almost satellite speeds.So those are the fundamentals of computer repair and if you take advantage of our home study course these are the things we concentrate on improving. Having this knowledge gives you the direction you need to get real computer repair and even if you hire someone to speed up your computer now you know exactly what to tell them to do.

Online Membership Management For Corporate Officials

People who handle serious tasks in the corporate world should really be kept abreast of the techniques, methods, and modes of how to properly execute their management prowess. They are not simply taking charge of simple work but rather they are responsible for the execution of several jobs that of course pose great relevance to the flow of the company's work plan. But how could project managers and other top officials of the corporate companies master the art of management? How could they be educated with what is necessary in terms of properly handling their tasks and maintaining a harmonious relationship with their subordinates? It would help of course if there would be some available clubs or organizations that they could partake in.Online membership management is one particular way of communing with other managers so that they could share with each other some pertinent insights regarding how to deal with their work, how they could possibly go on with their tasks without actually suppressing the rights of other employees and offending other people, and how a good relationship could exist between the superiors and their subordinates. Online membership management through forums is a great avenue to voice out one's opinion, ask questions, address concerns, help out people, and gain friends. More and more people are nowadays getting involved with online membership management by means of forums.Typically, online membership management for forums would require one to fill out the online application forms. Some forums ask for membership fees whereas there are those that come for free. The same interests unite the people who take part in the forums. Meaning to say, there are different forums for different concerns of people. Usually, businessmen are part of forums. Their online membership management is always active because it is through the forums that they are able to get in touch with other people who share the same interest and kind of thinking with them. They may not actually know each other personally but they feel close and are bound as one because of their focus and concerns in life.Aside from the forums, there are other educational sites that the World Wide Web hosts. For the corporate managers, they could enroll in the PMLC or Project Management Learning Center. Aside from this, there are likewise other relevant websites that could help out incorporate valuable knowledge into their minds especially when it comes in line with their careers. Online membership management is usually globally oriented. Meaning, the enrollees or learners are from all over the world. With this kind of online membership management learning opportunity, there are a lot to learn from the discussions, social networking, and other materials handed out. The PMLC program indeed promote the procedure of developing, creating, sharing, incorporating, and applying the relevant knowledge in line with project management. All these things are believed to be geared towards the advantages to be heaped to both the profession and humanity itself. The online membership management would provide the involved people the easy access to seminars, events, conferences, and a lot other opportunities that could greatly help them. Online membership management is a reliable recourse for corporate managers because they could be offered the best opportunities that will all the more improve their skills and enhance their managing prowess. The Internet is the best source of programs that will educate the top officials of many companies so that they would be able to properly carry out their designated functions.

In The Recommendation Age Sophisticated Filtering Engines Are Our Beacons

It wasnt too long ago we were embracing the information age. Most of us still think we are in it. But the consequence of the information age is the overwhelming volume of information on any given subject, product or service. We are forced to spend a great deal of time sifting through sites, bits and bytes to [hopefully] discover what we are looking for.Be it music, film, books or other products the sheer volume of choice makes it more difficult to find what we want; but we are also offered an abundant picking list: This immense list has emerged because a) production has been democratized: Never before has any single human being anywhere been able to operate independently to bring something of value to the world stage; be it a sound track, desktop wallpaper image, Flash cartoon, computer programming service, or indeed, more and more, a paid commentator, and b) distribution now takes the form of bits and bytes, meaning zero goods stock holding so companies like Amazon can print books on demand and iTunes can deliver music in bytes.These two forces create abundance in choice and transform information into saleable products and services.But sifting through tons of information to get to what we want is a bit like weeding the garden. We have to look at almost every blade of grass to get all the weeds out before we see the right result. And usually we miss a few patches.What if we had someone helping us weed? Like a tennis umpire overlooking the landscape and directing our attention to important areas within our focal length. Moving from Information age to Recommendation age the collective wisdom of the crowd is the new connoisseur. More and more people spend time writing reviews and recommendations, creating Blogs about everything, posting comments, writing forum topics and replies and so on and these serve as beacons for us searchers by highlighting areas of interest through a process called filtering.Today filters are king! They help us find what we are looking for within the overwhelming abundance of choice. Sites like Google filter pages to bring us the most relevant to our search term. Amazon provides recommendations and reviews along with every book on the planet. Netflicks tracks our search patterns to filter and offer movies that closely match our needs for titles we havent even heard of. Ten years ago my local music store offered me 4000 titles. Today iTunes offers me over 4 million. I may have spent an hour browsing my local music store. How many would that be online?Filtering transcends search and browse behavior. It is amplified through word of mouth. Sites like MySpace are huge filtering engines for new music bringing us informed democratic choice though collective sharing. Linkers build online bookmarks and the numbers of clicks to those web sites are like endorsements, showing us where to click next.With monstrous data crunching technology more and more sites are able to measure consumption patterns in real time and make changes just as quickly. This is a grand shift entering the Recommendation age.Google Adsense filters immense volumes of keywords to bring quality ad content to any web site. Amazon Associates are easily able to place recommendations and reviews on their own web sites. These targeted ads and recommendations act as beacons or short cuts to what seek in a landscape filled with abundance. With good filters diamonds can be found anywhere.Sites like Rhapsody, MySpace, Netflicks, and Commission Junction are the modern day factories. The workforce has been democratized so that any individual anywhere can produce hard or soft products and services for anyone to consume. All of these sites offer sophisticated filtering through recommendations, reviews and statistics. Still other sites like Digg, Reddit, Folkd, Shoutwire and Care2 are aggregators of opinion on any given topic and filter information based on democratic consensus and democratic publishing.Bloggers filter niche market information providing direct access to relevant data. Blog comments are like fine tuners and direction finders helping us home in without reviewing every option ourselves.The age of information is over. We have entered the age of Recommendations. Successful entrepreneurs would be wise to consider the new way to wow the crowd is to automate filtering through sophisticated engines and to engage users with interactive features like commenting, recommendations, reviews, Blogs and articles.

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...