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A method of decoding on an electronic device

A decoder and image equipment technology, applied in the direction of electrical components, banknote authenticity inspection, image data processing, etc.

Inactive Publication Date: 2011-09-28
联邦科学和工业研究机构
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each decoder must be made by hand or machine

Method used

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  • A method of decoding on an electronic device
  • A method of decoding on an electronic device
  • A method of decoding on an electronic device

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Embodiment 100

[0107] The method of embodiment 100 is in figure 1 , and includes a first stage 101 of generating a hidden image. This stage 101 comprises: selecting a decoder 110; obtaining a source image 120 to form an image to be hidden within the hidden image; and generating 130 the hidden image according to one of the suitable transformation techniques described in further detail below. It can be appreciated that when decoded, the hidden image will reveal an image closely related to the source image. In fact, the image hidden within the hidden image is security information for verification or authentication. By applying the relevant decoder, the status of the artifact to which the hidden image is applied can be changed from unauthenticated to authenticated.

[0108] The second stage 102 comprises: obtaining a hidden image and a decoder; and forming the first and second images 140 using the hidden image and the decoder if necessary. This step 140 is optional and is implemented if the f...

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Abstract

A hidden image method comprising: obtaining a first image and a second image, the first and second images providing between them a hidden image and a decoder such that a hidden image is decoded by the decoder when the first image and the second image are superposed at at least one decoding position; printing the first image onto a light transmissive substrate to produce a printed substrate; displaying the second image on an electronic display; and superposing the printed substrate relative to the display at a decoding position to decode the hidden image.

Description

technical field [0001] The present invention relates to a hidden image method and a hidden image device of particular (but not exclusive) application in the security field. Background technique [0002] Current decoders are small, thin objects such as rigid screens, masks that are overlaid on top of objects containing hidden images. Typically biconvex lenses with ridges are used. The current decoder is manipulated or moved back and forth to see the hidden image. Manipulation is typically by horizontal or vertical alignment, or by changing the viewing angle. Such decoders or lenses are easily lost or physically damaged. They also often require additional light to actually reveal the image. Correct orientation is difficult because eg a moving marker has to be aligned with a moving mask on a flat surface. In a secure system, typically only some decoders are released to authorized users. Each decoder must be made by hand or machine. [0003] An alternative hidden image de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCH04N1/32256H04N1/32309H04N2201/3273G07D7/2066B42D15/10G06T1/00B42D15/0013B42D2035/36B42D2033/46H04N1/32352H04N2201/3271H04N1/4493B42D25/00G07D7/0046B42D25/29H04N1/32219G07D7/005G07D7/207H04N1/32149
Inventor 劳伦斯·戴维·麦卡锡马休·约翰·巴拉德
Owner 联邦科学和工业研究机构