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RAINBOW TECHNOLOGY
1. INTRODUCTION
Rainbow technology, a breakthrough in digital data storage enables us to store up to a massive 450GB on just a piece of paper. Rainbow Storage is a group of techniques to store digital data in some colors, color combinations and some symbols known as rainbow format, and therefore a rainbow picture will be generated. The technique is used to achieve high-density storage. With the help of Rainbow system we would be watching full-length high-definition videos from a piece of paper.
The main attraction is the cheap paper. The Rainbow technology is feasible because printed text, readable by the human eye is a very wasteful use of the potential capacity of paper to store data. By printing the data encoded in a denser way much higher capacities can be achieved. Paper is, of course, bio-degradable, unlike CDs or DVDs. And sheets of paper also cost a fraction of the cost of a CD or DVD.
2. HOW IS IT POSSIBLE?
Data stored in rainbow format on an ordinary paper.
It uses geometric shapes such as squares and hexagons to represent data patterns, instead of the usual binary method that uses ones and zeros to represent data. Besides, color is also used in the Rainbow system, to represent other data elements. Files such as text, images, sounds and video clips are encoded in "rainbow format" as colored circles, triangles, squares and so on, and printed as dense graphics on paper at a density of 2.7GB per square inch. An RVD therefore looks like a print-out of the modern art.
The paper can then be read through a specially developed scanner and the contents decoded into their original digital format and viewed or played. The Rainbow technology is feasible because printed text, readable by the human eye is a very wasteful use of the potential capacity of paper to store data. By printing the data encoded in a denser way much higher capacities can be achieved. The retrieval of data is done by scanning the paper or the plastic sheet containing the data into a scanner and later reading it over monitor. Instead of using 0s and 1s, we use color dots where each color dot can represent minimum 8 bits (1 byte). The rainbow picture will be highly compressed and can be represented in any color medium. For retrieving the contents from the medium, picture can be captured and data can be generated from the color combinations. "Although environmental light differences and color shading is a problem, it can overcome up to a certain limit by using efficient mapping functions".
3. Process of Storing data:
Printing at 1,200 dots per inch (DPI) leads to a theoretical maximum of 1,440,000 colored dots per square inch. If a scanner can reliably distinguish between 256 unique colors (thus encoding one byte per dot), the maximum possible storage is approximately 140 megabytes for a sheet of A4 paper–much lower when the necessary error correction is employed. If the scanner were able to accurately distinguish between 16,777,216 colors (24 bits, or 3 bytes per dot), the capacity would triple, but it still falls well below the media stories' claims of several hundred gigabytes.
Printing this quantity of unique colors would require specialized equipment to generate many spot colors. The process color model used by most printers provides only four colors, with additional colors simulated by a halftone pattern.
At least one of three things must be true for the claim to be valid:
 The paper must be printed and scanned at a much higher resolution than 1,200 DPI,
 The printer and scanner must be able to accurately produce and distinguish between an extraordinary number of distinct color values
 The compression scheme must be a revolutionary lossless compression algorithm.
If Rainbow's "geometric" algorithm is to be encoded and decoded by a computer, it would equally viable to store the compressed data on a conventional disk rather than printing it to paper or other non-digital medium. Printing something as dots on a page rather than bits on a disk will not change the underlying compression ratio, so a lossless compression algorithm that could store 250 gigabytes within a few hundred megabytes of data would be revolutionary indeed. Likewise, data can be compressed with any algorithm and subsequently printed to paper as colored dots. The amount of data that can be reliably stored in this way is limited by the printer and scanner, as described above.
4. IMPLEMENTATION REQUIREMENTS:
Discs can now be developed from plastic paper too which will be able to hold 450 GB of data.
In order to read the Rainbow prints, all that is required is a scanner and specialized software. Smaller scanners could fit inside laptop computers or mobile phones, and read SIM card-sized RVD's containing 5GB of data.
The recording media could be either paper or plastic sheets. The piece of paper or even plastic sheet storing the data has just to be scanned in the scanner and read over the monitor. A scanning drive based on the Rainbow software has simultaneously been developed which will come in smaller sizes to be initially carried with the laptops and later to fit into their bodies.
The developer is simultaneously moulding the technology into 'Rainbow Cards' which will be of SIM card size and store 5 GB of data equivalent to three films of DVD quality.
As 'Rainbow Cards' will become Popular, Rainbow Card Readers will replace CD drives of mobile phone and computer notebooks and will enable more data in portable forms for mini digital readers. Large scale manufacture of the Rainbow card will bring down its cost to just 50 paise
Principle I
“Every color or color combinations can be converted in to some values and from the values the colors or color combinations can be regenerated”.
Principle II
“Every different color or color combinations will produce different values”.