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Matrix digital rain, or Matrix code, is the computer code featured in the Matrix series. The falling green code is a way of representing the activity of the simulated reality environment of the Matrix on screen by kinetic typography. All four Matrix movies, as well as the spin-off The Animatrix episodes, open with the code. It is a characteristic mark of the franchise, similar to the opening crawl featured in the Star Wars franchise.

In the film, the code that comprises the Matrix itself is frequently represented as downward-flowing green characters. This code uses a custom typeface designed by Simon Whiteley,[1] which includes mirror images of half-width kana characters and Western Latin letters and numerals.[2] In a 2017 interview at CNET, he attributed the design to his wife, who comes from Japan, and added, "I like to tell everybody that The Matrix's code is made out of Japanese sushi recipes".[3]

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The effect resembles that of older generation green screen displays of monochrome phosphorescent computer monitors.[4] One predecessor of the digital rain exists in a "code-scene" of the movie Meteo, a Hungarian experimental-pop culture movie from 1990. The 1995 cyberpunk film Ghost in the Shell, a strong influence on The Matrix,[5][6] features opening credits similar to the digital rain.

No official version of the code's typeface actually used in the Matrix trilogy and in the website for the game Path of Neo has been released. Several imitations have been made, mostly in the form of screensavers.

At first glance, both Data Matrix and QR Codes look relatively similar - they're both 2D codes and square or rectangular in overall shape, but they're very different. The easiest way is to look for the larger squares at the corners - if there are squares in the code - it's QR; if it's more uniform in appearance, it's a Data Matrix Code.

From extending product packaging to communicate brand messaging to providing options for internal track and trace and anti-counterfeiting measures, 2D codes can offer a wealth of opportunities for manufacturers in all industries.

QR codes can store a maximum of 4,296 alphanumeric characters, determined by the number of rows and columns contained within the code. A QR code consists of dark- or light-colored squares arranged in a grid on a contrasting background.

The number of rows and columns within a Data Matrix increases with the amount of information stored in the code; this is limited to 2,335 alphanumeric characters. Requirements for Data Matrix codes are specified under the ISO/IEC 16022 international standard.

In practice, however, 2D Data Matrix codes are typically used for internal product identification and anti-counterfeiting, while QR codes have become the standard format for most consumer-facing applications.

In order to tell the story of QR Codes and 2D Barcodes, you don't really have to go to their collective birth in the 1990s, but instead, to 20 years later - in the middle of the 2010s and the QR Code, in all of its informational glory, had made its first move into wide consumer use.

At first glance, the two types of codes look relatively similar - square or rectangular in overall shape - but they're so much different. The easiest way is to look for the larger squares at the corners - if there are squares in the code - it's a QR Code - whereas a 2D Code is more uniform in its appearance.

A Data Matrix is a 2D barcode that encodes data in black and white, or contrasting dark and light, cells arranged in a grid. Unlike 1D barcodes, Data Matrix codes are omnidirectional, meaning that they can be read from any angle.

Though typically printed in black and white, Data Matrix codes can be printed in different color combinations, provided there is sufficient contrast between dark and light cells to ensure readability.

Data Matrix codes can be scanned from any angle (0-360) using a Data Matrix code scanner, or omnidirectional camera scanner. Some smart phone cameras are physically capable of scanning Data Matrix codes; however, many smart phones do not have the functionality built in and will require a third-party app to read the information.

A QR code, or Quick Response code, is matrix-based 2D barcode that encodes data in black and white, or contrasting dark and light, cells arranged in a grid. Like other 2D codes, QR codes are omnidirectional meaning that they can be read from any angle.

The QR code was invented in 1994, by the Denso Corporation of Japan. Despite being over 25 years old, in larger Model 2 form (shown below) the technology can be quite information dense, capable of displaying up to 2953 bytes of binary information.

Though often printed in black and white, QR codes and can be printed in several different colors. However, there must be sufficient contrast between dark and light cells to accentuate the code itself and the background so the code is easily picked up by the scanner.

Like Data Matrix codes, QR codes can be scanned from any orientation using a specialist QR code scanner, or camera scanner. QR codes can also be scanned using a smart phone camera. In recent years, some mobile phone manufacturers have started to include QR code readability within standard camera functionality. This gives QR codes a slight edge over Data Matrix codes in customer-facing applications, as users may be able to scan a code direct from their phone camera, without using a specialist app.

Data Matrix codes are physically smaller than QR codes, offering high data density in a very small size, making them an ideal solution for marking individual product parts, where space might be limited. The US Electronic Industries Alliance (EIA) recommends using Data Matrix for labelling small electronic components. Data Matrix codes are also the only 2D codes approved by GS1 for regulated healthcare items; they are also the default code type for automotive and aerospace applications.

By comparison, QR codes are larger and can contain more data than Data Matrix codes. In addition, while Data Matrix codes are only capable of encoding information in numeric and alphanumeric characters, because QR codes were invented in Japan, they can also include Kanji, and other multi-byte character sets, making them suitable for use with non-European languages.

In practice, however, Data Matrix codes are most often used for internal product identification and anti-counterfeiting applications, while QR codes have become the standard format for most consumer-facing applications.

As with any product labelling, it is also important to ensure that 2D codes are printed correctly, by choosing the right printing application, and an accompanying code verification system, to check the quality and accuracy of the final code.

While Data Matrix and QR codes provide a greater tolerance for errors than traditional 1D barcodes, it is imperative to ensure that codes are clean, crisp, and correct to ensure that they can be used effectively by consumers and trusted by retailers and those within the wider supply chain.

If you are considering adding a Data Matrix code or QR code to your product packaging and need more information on how best to do this, please get in touch. We have a range of different printing and labelling solutions to suit the requirements for all industries and packaging types. We also offer a range of specialist code verification systems, designed to work alongside the Domino family of products. Our experts are on hand to talk through your specific requirements, and discuss which code, and printing solution, is best for your business.

The reason why you weren't seeing all characters on screen at once was because you were creating one character at a time, moving it all the way down, and then creating the next character. Instead, you need to initialise all your characters first, then move then down together. I have adjusted your code to:

While you may have thought it was a QR code, Data Matrix codes are an essential part of most manufacturing processes and act as an efficient means for component traceability. Data Matrix codes are also the only 2D barcode to have GS1 approval for regulated healthcare items.

QR codes on the other hand are larger and contain more data, such as website URLs, and are capable of encoding information not just in numeric and alphanumeric form, but also in Kanji and other multi-byte character sets.

No matter what industry, when it comes to industrial traceability for manufacturers, choosing the right type of code can leave a production run riddled with misinformation and the chance of getting lost.

While both QR and Data Matrix codes are in the public domain and can be used royalty free, Data Matrix codes have become the standard for anti-counterfeit measures, part identification, and internal tracking because they feature advanced error-correcting techniques that are more robust than QR codes.

Particularly necessary for complex and high stakes industries such as medical, aerospace, and defense, where hundreds to thousands of components are needed in order to assemble a finished product, Data Matrix codes can be read even if up to 50% of the mark gets damaged.

QR codes on the other hand have steadily been adopted in consumer-facing applications. These codes can be found everywhere from business cards to product packaging, containing links to websites, resumes, premium offers, and even restaurant menus.

Beyond GS1, specifications and requirements for each code are presented by the International Organization for Standardization (ISO). For more about how these codes work themselves, and how to create them, you can check out the relevant ISO standard for more detail. e24fc04721