Comparison Between Laser Scanning or Digital Imaging in Respect of Barcode Technology for Application

Posted by : admin | On : December 14, 2012

There is today a lot of bar code symbologies, and with that given; ways to capture the data held by these different types of bar code have evolved. Data capture technologies came in transition along with all the advancements that brought us into this modern era. A wider selection of various scanning devices is now provided to all kinds of industries. Scanning is now considered as a remarkable innovation that has changed the business world. Everything can now be done with more efficiency and accuracy. Productivity levels increased a greater deal ever since the data capturing technologies were introduced.

There are two predominant scanning devices that are often in a feud against each other in terms of their capabilities. Laser scanning and digital imaging is the leading data capture technologies known to us today. However, the question to which of them is better is still living. Here, let us briefly discuss on some points to consider about each of these two data capture technologies.

Laser Scanning

Just the way its name implies, laser scanners make use of optical laser beams to capture and decode bar code. It works along with a lens a mirror that helps with the task. Perhaps you’ve seen one of these laser scanners around supermarkets or whenever you go shopping. They’re quite prevalent around retail areas since they work very compatibly with conventional bar code. So continuing to how these laser scanners work its magic, the process is actually pretty simple. The laser captures the bars, lines, or the very image of the bar code, then lens focuses the beams which will then get reflected and illuminate through the mirrors. An image detector will then convert the reflected light into signals that turn into transmittable digital data. After that, the digital data the bar code holds get interpreted and verified.

A laser scanner like it was mentioned earlier can be often found around retail environment and that is because this type of scanner works best around motion sensitive areas likes supermarkets. Items get rapidly scanned, and that’s why it’s important that the scanners capture the bar code image as fast as possible to achieve higher levels of productivity. And because this scanning device uses laser beams, it is able to project long distance light beams which allows user to scan within a wider range than most scanners can do.

Digital Imaging

Area and Linear Images, they are the two kinds of digital imaging. Digital imaging uses LED lights that illuminate and capture bar code images quickly. It uses the same technology like taking a photograph with a digital camera. Basically, it’s like taking a bar code picture. A software will then decode the data and locate the bar code within the captured image. Then data gets processed, interpreted and verified.

Area and Linear Images are actually very alike, only that Linear Images only captures a single row of data pixels. Thus, its work is limited around 1D bar codes only unlike Area Images that can scan and read 2D bar code. Nonetheless, digital imaging is considered a more advanced way of scanning bar code. It is able to scan the latest kinds of bar code because of that. Digital imaging is efficient and reliable just like any other scanning device.