Surveillance Camera Storage Compression Control
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Solution Overview
Problem
Surveillance cameras face storage space limitations, leading to discarded images of suspicious persons when storage medium capacity is exceeded, preventing necessary image data from being stored.
Innovation Solution
An imaging apparatus with an image creating section, storage processing section, data storage section, compression processing section, and determination processing section that detects storage data amount, compresses data when capacity is reached, and re-stores it, ensuring priority images are securely saved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the storage medium capacity is increased, then more image data can be stored, but the device size and cost increase
Solution Approach 1:
The patent changes the parameter of data compression ratio dynamically. When storage capacity is sufficient, lower compression is applied to maintain image quality. When storage capacity becomes limited, the system increases compression ratio to extend storage capacity, thus resolving the contradiction between storage capacity and device complexity by adjusting compression parameters rather than physically expanding storage media.
Solution Approach 2:
The system dynamically adjusts compression processing based on real-time storage capacity detection. The determination processing section continuously monitors storage usage and dynamically controls the compression processing section to apply appropriate compression levels, transforming a static storage system into a dynamic one that adapts to changing storage conditions.
2Quantity of substance
If data compression is applied to increase storage capacity, then more images can be stored, but image quality deteriorates
Solution Approach 1:
The system changes compression parameters adaptively based on storage capacity conditions. When storage is sufficient, minimal compression is applied preserving high image quality. When storage becomes limited, the system gradually increases compression ratio while monitoring storage status, thus extending storage capacity while minimizing quality deterioration through parameter optimization.
Solution Approach 2:
The patent applies partial compression action - not all stored images are compressed at the same level. Recently captured images or those with higher priority may be stored with lower compression, while older or less critical images receive higher compression, allowing the system to extend storage capacity without uniformly degrading all image quality.
3Quantity of substance
If real-time compression processing is performed when storage capacity is reached, then storage capacity is extended, but processing time increases
Solution Approach 1:
The determination processing section continuously monitors storage capacity in advance before the storage medium becomes fully occupied. When storage capacity approaches the threshold, the system proactively initiates compression processing on previously stored images, preventing storage overflow. This preliminary action allows compression to occur during periods when new image capture is not critical, reducing impact on real-time performance.
Solution Approach 2:
The system performs compression processing periodically based on storage capacity thresholds rather than continuously. When storage usage reaches certain levels, compression is triggered in periodic cycles, allowing the system to balance between extending storage capacity and maintaining real-time processing performance by not compressing continuously.
Data Source
AI summary
An imaging apparatus includes an image creating section for imaging a predetermined surveillance range and creating image data, and a storage processing section converting the image data to a predetermined storage format and creating storage data. A data storage section having a storage medium with a predetermined storage space stores the storage data created by the storage processing section. The apparatus includes a compression processing section for reading storage data stored in the data storage section, and compressing the storage data and creating compressed data. A determination processing section detects the data storage amount of the storage data stored in the data storage section, supplies a compression control signal to the compression processing section in accordance with the detection result and supplies the storage control signal to the data storage section.