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Method and apparatus for inlaying watermark in digital image and digital camera capable of adding watermark

A digital image and watermarking technology, applied in the direction of image data processing, image data processing, image communication, etc., can solve the problems of unsatisfactory practicability, reduce the speed of taking pictures of digital cameras, etc., and achieve the effect of correctness guarantee

Inactive Publication Date: 2006-09-27
HUAQI RES INST OF IMAGE COMPUTING
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Problems solved by technology

This digital image watermarking algorithm uses image blocks to locate tampered areas. If this method of block processing images is used on digital cameras, it will greatly reduce the camera speed of digital cameras. Therefore, it is used in digital cameras practicality is not ideal

Method used

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  • Method and apparatus for inlaying watermark in digital image and digital camera capable of adding watermark
  • Method and apparatus for inlaying watermark in digital image and digital camera capable of adding watermark
  • Method and apparatus for inlaying watermark in digital image and digital camera capable of adding watermark

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Embodiment Construction

[0055] The present invention will be further described in detail below in conjunction with the accompanying drawings, please refer to the accompanying drawings. figure 1 The device in the digital camera can be divided into 6 parts. figure 2 The operation of verifying photos can be divided into 7 steps.

[0056] A digital camera with a watermarking device, including: a device for obtaining the signal value of a digital signal, which is used to read out the value of a digital signal, which is converted from an optical image to an analog signal in a digital camera The bit division device is used to divide the data of each pixel point in the recorded digital image into bits for calculating the image feature value, the bit for hiding the watermark and the bit for locating the tampered area; The data on the bits of the image falsification area are all set to a fixed value, such as all 0 or all 1, so as to locate the falsified area of ​​the image during verification; the device for...

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Abstract

This invention relates to a method and apparatus for inlaying watermark in digital image and digital camera capable of adding watermark, which comprises a device to acquire signal and read out signal value, a device for bit division to divide the pixel data of digital image into the bit for image eigenvalue calculation, the bit for hiding watermark, and the bit for location interpolation area; an initialization device for location interpolation area to set the all bits as zero or one, a device to calculate eigenvalue of digital signal, a encipher device for the eigenvalue, and a watermark- embedding device to embed eigenvalue information into the digital signal.

Description

【Technical field】 [0001] The present invention relates to a method and a device for embedding a watermark into a digital image, a method and a device for verifying a digital image, and a digital camera capable of embedding a watermark into a photograph taken, in particular to a watermark that can identify the authenticity of a digital image , verification method and device, and a digital camera with a watermarking device. 【Background technique】 [0002] Digital cameras have become very popular due to increasing image quality and increasingly simplified desktop PC interfaces. Digital cameras take digitized images, allowing you to send them over the Internet or print them to a color printer. Today, digital cameras have almost become a must-have in our lives. Today, with the increasing popularity of digital technology, it is not difficult to use various software to modify and edit digital photos, which brings convenience to tampering with the information recorded in digital p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00H04N5/225
CPCH04N2201/3281H04N1/32283G06T1/0042G06T2201/0051H04N1/32144
Inventor 田新刘曼杨祥辉
Owner HUAQI RES INST OF IMAGE COMPUTING
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