Camera identification method, authentication method, system, and terminal
AssigneeShenzhen Yinwang Intelligent Technolgoies Co., Ltd.
InventorsMark Ryan, Flavio Garcia, Steven Yin Zhong, Zhuo Wei
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Abstract
A camera identification method comprises identifying a to-be-identified camera using a light sensitivity deviation of each pixel in the to-be-identified camera; generating corresponding identification data; identifying a target camera using a light sensitivity deviation of each pixel in the target camera; and identifying the target camera by comparing a similarity between data that identifies the target camera and identification data of a known camera.
Claims20
A camera authentication method applied to a camera authentication system wherein the camera authentication method comprises:
- receiving a video stream from a target camera;
- extracting a second target image from the video stream;
- obtaining a plurality of pixel blocks from the second target image, wherein each of the plurality of pixel blocks comprises a first pixel and a plurality of second pixels;
- substituting perceived light intensity values of the plurality of second pixels into a linear relationship model to obtain predicted light intensity values of the first pixels in the plurality of pixel blocks;
- calculating a difference between the predicted light intensity values and second perceived light intensity values of the first pixels in the plurality of pixel blocks to obtain light sensitivity deviations of the first pixels;
- and
- authenticating the target camera based on the light sensitivity deviations of the first pixels and identification data corresponding to the plurality of pixel blocks.
A camera authentication system, comprising:
- a receiver configured to receive a video stream from a to-be-identified camera;
- a memory coupled to the receiver and configured to store identification data of the to-be-identified camera;
- and
- a processor coupled to the receiver and to the memory, wherein the processor is configured to:
- extract a second target image from the video stream;
- obtain a plurality of pixel blocks from the second target image, wherein each of the plurality of pixel blocks comprises a first pixel and a plurality of second pixels;
- substitute perceived light intensity values of the plurality of second pixels into a linear relationship model to obtain predicted light intensity values of the first pixels in the plurality of pixel blocks;
- calculate a difference between the predicted light intensity values and second perceived light intensity values of the first pixels in the plurality of pixel blocks to obtain light sensitivity deviations of the first pixels;
- and
- authenticate the to-be-identified camera based on the light sensitivity deviations of the first pixels and identification data corresponding to the plurality of pixel blocks.
A terminal, comprising:
- at least one to-be-identified camera configured to:
- obtain a video stream;
- and
- transmit the video stream;
- and
- a camera authentication system coupled to the at least one to-be-identified camera and configured to:
- receive the video stream;
- extract a second target image from the video stream;
- obtain a plurality of pixel blocks from the second target image, wherein each of the plurality of pixel blocks comprises a first pixel and a plurality of second pixels;
- substitute perceived light intensity values of the plurality of second pixels into a linear relationship model to obtain predicted light intensity values of the first pixels in the plurality of pixel blocks;
- calculate a difference between the predicted light intensity values and second perceived light intensity values of the first pixels to obtain light sensitivity deviations of the first pixels;
- and
- authenticate the at least one to-be-identified camera based on the light sensitivity deviation of the first pixels and identification data corresponding to the plurality of pixel blocks.
Dependencies are inferred from the claim text.