Prnu-based image source identification method and system
An identification method and image technology, which is applied in the field of image identification, can solve problems such as influence, inability to detect whether the header information has been modified, inability to specifically distinguish individual shooting devices, etc., and achieve the effect of improving accuracy
Active Publication Date: 2021-11-05
深圳市华云中盛科技股份有限公司
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Problems solved by technology
In the existing technology, the simplest method is to confirm the source of the photo by checking the image header information, but this method cannot detect whether the header information has been modified; another more reliable method is to identify the source by analyzing the image noise, but due to the Pattern noise is seriously affected by image content, so it can only be used to distinguish the brand of shooting equipment, but cannot specifically distinguish each individual shooting equipment
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[0060] In order to fully understand the technical content of the present invention, the technical solutions of the present invention will be further introduced and illustrated below in conjunction with specific examples, but not limited thereto.
[0061] Such as Figure 1-10In the specific embodiment shown, the PRNU-based image source identification method provided by this embodiment can be used in the process of image identification to weaken the influence of image content, improve the accuracy of image source identification, and accurately distinguish each shooting device individual.
[0062] The aforementioned PRNU is Photo-Response Non-Uniformity Noise (PRNU).
[0063] Such as figure 1 As shown, the present embodiment provides a PRNU-based identification method for an image source, the method comprising:
[0064] S1. Obtain the device to be tested and the image to be tested;
[0065] S2. Extract the PRNUs of all the devices under test to form a PRNU library;
[0066] ...
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The invention relates to a PRNU-based image source identification method and a system thereof. The method includes acquiring a device to be tested and an image to be tested; extracting PRNUs of all devices to be tested to form a PRNU library; extracting PRNUs of an image to be tested; The PRNU calculates the probability that the image to be tested matches the PRNU library; the shooting device with a high probability is selected as the source device of the image to be tested. The present invention obtains the PRNU of the device to be tested and the PRNU of the image to be tested respectively, and matches the two to identify the source of the image. In the process of obtaining the PRNU, the printed picture of the image to be tested is strictly controlled to weaken the image content. Improve the accuracy of image source identification and accurately distinguish each individual shooting device. Due to the uniqueness of PRNU, even two shooting devices of the same model can be distinguished, thereby improving the accuracy of image source identification and accurately distinguishing each Shooting equipment individual.
Description
technical field [0001] The present invention relates to the technical field of image identification, and more specifically refers to a PRNU-based image source identification method and system thereof. Background technique [0002] With the rapid development of digital equipment and image processing software technology, people can easily acquire and modify digital images. However, while advanced technology brings convenience to people's lives, it also exposes many security problems. Images have always been an intuitive and reliable source of information. However, with the development of science and technology, there are more and more images, and it is becoming easier to generate and tamper with images. If criminals use forged digital images for formal occasions such as news, evidence, and scientific research, it will be It will confuse the public and have a serious impact on the authenticity of the event and social stability. Therefore, digital image forensics technology t...
Claims
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IPC IPC(8): G06K9/62G06K9/40
CPCG06V10/30G06F18/22
Inventor 温凯雯吕仲琪顾正
Owner 深圳市华云中盛科技股份有限公司