Multi-color information encoding system

• US 5,568,555 A
• Filed: 11/23/1994
• Issued: 10/22/1996
• Est. Priority Date: 02/12/1992
• Status: Expired due to Fees

• Current Assignee: Colorcode Unlimited Incorporated
• Original Assignee: Colorcode Unlimited Incorporated
• Inventors: Shamir, Harry A.
• Primary Examiner(s): Cain, David C.
• Application Number:
  US08/344,118
• Time in Patent Office: 699 Days
• Field of Search: 380/51, 380/55, 380/23, 380/4, 235/494, 235/487
• US Class Current: 380/51
• CPC Class Codes: G06K 19/06037 multi-dimensional coding
• CPC Class Codes: G06K 2019/06225 using wavelength selection, e.g. colour code

Abstract

An exceptionally dense information encoding system, with 4-10 times the density of CD ROM diskettes, employs colored areas in the form of bars or checkerboard matrices of colored dot regions to encode information including alphanumerics, with each colored region being variable as to both color and intensity. In one embodiment, so-called super pixel dots have differently colored sub-regions within them, arranged with side-by-side colors or with colored regions stacked one on top of the other, such that information from one dot has as many color variables as there are stacked layers or mixed colors. In one embodiment the super pixel dot is 5 microns in diameter with 2 micron spacing between adjacent dots. For each color in one embodiment there are as many as 64 intensities yielding a coding system of high information density. The various colors are read out at one super pixel dot position by dividing out reflected or transmitted energy from a dot by color filtering such that a color and intensity can be detected for each color intensity within the super pixel dot. The code provided by the subject system is substantially invisible to the naked eye, with machine vision and computer analysis of the information being required to effectively decode differences of intensity. Additionally, encrypting can be performed on the digitally encoded information to further hide the information carried by the colored dot matrix. Moreover, standardized intensities are established by one or more of the coded regions to assist in machine decoding, and correction techniques are applied for variations in detected color and intensity.

Claims

1. A method for decoding a data region, on a medium, and converting the data region into at least a portion of a human-ascertainable informational element, the data region being encoded with at least one of n different colors, wherein each color of the plurality of n different colors has a wavelength in a range of wavelengths defining a bandpass, and one of m different intensities, the method comprising the steps of:

determining the color of the data region;

determining the intensity of the data region;

decoding the color and intensity to provide a bit stream, wherein each data region has at least (n^k) different unique bit streams which can be provided from the region; and

converting the bit stream into the at least a portion of the human-comprehensible informational element.

2. The method of claim 1, wherein the step of converting includes converting the bit stream into alphanumeric or other symbols.

3. The method of claim 1, wherein the step of determining the color includes illuminating the data region with an incident energy provided by an energy source and detecting an energy emitted from the data region.

4. The method of claim 3, wherein the incident energy is incident on a backside of the data region and the emitted energy is that energy which travels through the data region and is collected at a front side of the data region.

5. The method of claim 3, wherein the incident energy is provided at a front side of the data region and the emitted energy is reflected from the front side of the data region.

6. The method of claim 3, wherein the energy source is a source of electromagnetic energy.

7. The method of claim 3, wherein the step of determining the intensity includes converting the emitted energy from the data region into a signal related to the emitted energy.

8. The method of claim 3, wherein the step of determining the intensity includes receiving the emitted energy from the data region with a charge coupled device.

9. The method of claim 7, further including the step of correcting the determined color and the determined intensity by the steps of:

determining the color and intensity of a reference region, the reference region having a predetermined color and a predetermined intensity;

comparing the determined color and intensity of the reference region with the predetermined color and intensity and providing an error signal based on any difference; and

using the error signal to correct the determined color and the determined intensity of the data region.

10. The method of claim 1, further including a step of decrypting the provided bit stream based on a key.

11. The method of claim 1, wherein the data region includes a plurality of layers superimposed over each other, each layer having one of the n colors and one of the k intensities.

12. A method for decoding data encoded in an amorphous data region, on a medium, the data region having one of a plurality of different intensities, the method comprising the steps of:

determining an intensity of the amorphous data region;

deriving a bit stream from the determined intensity of the amorphous data region; and

converting the bit stream into at least a portion of a human-comprehensible informational element.

13. The method of claim 12, wherein the step of converting includes converting the bit stream into alphanumeric symbols.

14. The method of claim 12, wherein the step of determining the intensity includes illuminating the amorphous data region with an incident energy and detecting an energy emitted by the data region.

15. The method of claim 14, wherein the step of determining the intensity includes detecting the emitted energy, with a charge coupled device.

16. The method of claim 12, further including a step of decrypting the bit stream based on a key.

17. The method of claim 12, wherein the step of converting the bit stream includes outputting the at least a portion of the human-comprehensible informational element, with a transducer, so that it is perceivable by a user.

18. The method of claim 17, wherein the transducer is software.

19. The method of claim 12, further including the steps of:

detecting an intensity of a reference region, having a predetermined intensity; and

correcting the intensity of the data region with a difference between the detected intensity of the reference region and the predetermined intensity of the reference region.

20. The method of claim 12, wherein the medium includes a plurality of amorphous shaped adjacent regions, at least some of the adjacent regions having an intensity different from the adjacent regions.

21. The method of claim 12, wherein the amorphous region includes a plurality of layers stacked on top of each other and wherein each layer has an intensity which is separately determinable.

22. A method for encoding data on a medium comprising the steps of:

encoding at least a portion of a data element into encoded data; and

providing a plurality of regions on a medium, each region having at least one of a plurality of colors and at least one of a plurality of intensities, the at least one color and the at least one intensity representing the encoded data.

23. The method of claim 22, wherein the step of providing includes exposing an energy alterable material to create the plurality of regions on the energy alterable material.

24. The method of claim 23, wherein the energy alterable material is an electromagnetic sensitive media of any color.

25. The method of claim 22, wherein the step of providing includes printing the regions onto the medium.

26. An apparatus for decoding a data region, on a medium, and for converting the data region into at least a portion of a human-ascertainable informational element, the data region have at least one of a plurality of different colors and at least one of a plurality of different intensities, the apparatus comprising:

an energy source which provides an incident energy to the data region;

a detector which receives an energy emitted from the data region and detects the color and the intensity of the data region; and

means for decoding and for converting the color and the intensity into the at least a portion of the human-comprehensible information element.

27. The apparatus of claim 26, wherein the energy source is a light source including a plurality of color filters at an output of the light source.

28. The apparatus of claim 27, wherein the plurality of color filters are in series.

29. The apparatus of claim 27, wherein the plurality of color filters are in parallel.

30. The apparatus of claim 26, wherein the detector includes at least one charge coupled device.

31. The apparatus of claim 26, further comprising means for decrypting the data region.

32. The apparatus of claim 26, further comprising a transducer for outputting the at least a portion of the human comprehensible informational element to a user of the apparatus.

33. The apparatus of claim 26, wherein the medium includes at least one reference region which is also illuminated by the energy source;

and

wherein the apparatus further comprises means for comparing a determined color and a determined intensity of the reference region with the predetermined color and the predetermined intensity of the reference region and for correcting the determined color and the determined intensity of the data region to reflect any difference between the determined color and the determined intensity of the reference region and the predetermined color and the predetermined intensity of the reference region.

34. The apparatus of claim 26, wherein the medium includes a plurality of layers superimposed on top of each other, each of the plurality of layers having one of the plurality of colors and one of the plurality of intensities and each of the plurality of layers being separately determinable.

35. The apparatus of claim 26, wherein the medium includes a plurality of adjacent colored regions, at least one of the adjacent regions having a color and an intensity different from the adjacent regions.