Compressed Image Signatures for Camera Authenticity Proof
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Solution Overview
Problem
Existing authenticity proof methods require storing and transferring large amounts of RAW data, leading to increased memory and data transfer loads in imaging devices.
Innovation Solution
An imaging apparatus that compresses RAW data and generates signature data based on the compressed data, allowing for reduced memory and data transfer loads while maintaining authenticity proof capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RAW data is stored and transferred for authenticity proof, then authenticity verification is enabled, but memory load and data transfer load increase
Solution Approach 1:
The patent extracts only the essential authentication information from the complete RAW data by generating signature data through hashing. Instead of storing and transferring the entire RAW data file, only the compact signature data is stored and transferred, while the full RAW data is processed locally in the camera. This extraction principle resolves the contradiction by maintaining authenticity proof capability while dramatically reducing data quantity for storage and transfer.
Solution Approach 2:
The patent creates a cryptographic copy (signature) of the RAW data that serves the same authentication purpose as the original data. The signature data is a condensed representation that can verify authenticity without requiring the full RAW data to be stored or transferred. This copying approach enables authenticity proof with minimal data storage and transfer requirements.
2Quantity of substance
If signature data is generated based on compressed image data, then data transfer load is reduced, but processing complexity increases
Solution Approach 1:
The patent performs compression and signature generation as preliminary actions within the camera before data transfer. By completing these processing steps in advance, the camera outputs already-compressed data with embedded signatures, eliminating the need for external devices to perform complex processing. This preliminary action reduces data transfer load while keeping the overall system complexity manageable by concentrating processing in the camera.
Solution Approach 2:
The camera performs self-service by autonomously compressing the image data and generating signatures internally. This self-processing capability allows the camera to prepare authentication-ready data without requiring external processing infrastructure, reducing data transfer requirements while maintaining reasonable processing complexity within the camera's capabilities.
Data Source
AI summary
An imaging apparatus according to an embodiment includes a pixel array unit (101) including a plurality of pixels arranged in a matrix array, each of the pixels generating a pixel signal corresponding to light received by exposure, the pixel array unit acquiring image data based on each of the pixel signals respectively generated by the plurality of pixels, a compression unit (1020) configured to compress a data amount of the image data to generate compressed image data, a signature generation unit (1021) configured to generate signature data based on the compressed image data; and an output unit (104,131,132) configured to output the image data and authenticity proof data obtained by adding the signature data to the compressed image data.