Method for identifying digital photo and shooting camera
A technology for identifying numbers and photos, which is applied in the field of image processing, can solve the problem of low source identification accuracy, and achieve the effect of improving recognition rate, accuracy and robustness
Inactive Publication Date: 2019-08-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
[0004] Aiming at the above-mentioned deficiencies in the prior art, a method for identifying digital photos and shooting cameras provided by the present invention solves the problem of low identification accuracy of existing digital photo sources
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[0039] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.
[0040] Such as figure 1 As shown, the method for identifying a digital photo and taking a camera includes the following steps:
[0041] S1. Obtain the self-noise response function of the imaging sensor of the camera to be identified in each color channel;
[0042] S2. According to the self-noise response function of the imaging sensor of the camera to be identified, the noise of the imaging sensor that should be generated ...
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The invention discloses a method for identifying a digital photo and a shooting camera. The method comprises the following steps: S1, acquiring a self noise response function of an imaging sensor of acamera to be identified in each color channel; s2, acquiring imaging sensor noise which should be generated by the to-be-identified camera in each color channel when the to-be-identified camera shoots the to-be-identified digital photo scenery; s3, acquiring imaging sensor noise of the to-be-identified digital photo in each color channel; s4, obtaining a correction cross-correlation energy peak value between imaging sensor noise which should be generated when the to-be-identified camera shoots the scenery of the to-be-identified digital photo and imaging sensor noise existing in the to-be-identified digital photo; and S5, judging the to-be-identified digital photo corresponding to the condition that the average value of the corrected cross-correlation energy peak values of the color channels is greater than a threshold value as the digital photo shot by the to-be-identified camera. According to the invention, the accuracy and robustness of identifying the shooting equipment through the digital photo can be greatly improved, so that the identification rate of the digital photo source is improved.
Description
technical field [0001] The invention relates to the field of image processing, in particular to a method for identifying digital photos and shooting cameras. Background technique [0002] The cross-field leapfrog development of digital media signal processing is an important symbol of the coordinated development of information technology and Internet technology. The rapid development of image processing and editing technology has greatly increased the possibility of digital photos being tampered with and pirated, and greatly reduced the authenticity and reliability of digital media materials. Digital media pirated publications are identified as violations of intellectual property rights and will be punished by law, while deliberately tampered digital media will distort the facts and the true colors of the objective world, and will have a serious negative impact on people's lives and work. The extraction and recognition technology of digital photo shooting equipment features...
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IPC IPC(8): G06K9/62G06K9/46
CPCG06V10/56G06F18/22
Inventor 邬震宇孙福友张奇臣唐泽凌
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA