Surveillance Device Homogenized Resolution via Sensor Segmentation
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Solution Overview
Problem
Current surveillance devices struggle to generate high-resolution, distortion-free enlargements of large-scale scenes in real time, as they either suffer from low resolution due to wide-angle lenses or require post-processing that delays the representation of the composite image.
Innovation Solution
A monitoring device with multiple cameras, each equipped with multiple image sensors and optics that maintain homogenized resolution across the field of view, regardless of object distance, and a control unit that combines and transmits image data over a video IP network, allowing for real-time, distortion-free imaging and dynamic brightness adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a wide-angle lens is used to capture a large scene in real time, then the field of view is improved, but the resolution and image distortion deteriorate
Solution Approach 1:
The patent divides the imaging task into multiple segments by using several image sensors (e.g., four sensors arranged in a 2x2 grid) instead of a single wide-angle lens. Each sensor captures a smaller portion of the scene with higher resolution, and the individual images are stitched together to form a complete high-resolution overview image, thereby resolving the contradiction between wide field of view and high resolution.
Solution Approach 2:
The patent combines multiple individual images captured by separate image sensors into a single composite overview image. By merging the data from multiple sensors with different focal lengths, the system achieves both a wide field of view and high resolution without the distortion associated with single wide-angle lenses.
2Measurement precision
If a movable camera scans the scene line by line to achieve high resolution, then the resolution is improved, but the real-time representation of the scene deteriorates
Solution Approach 1:
The patent pre-positions multiple image sensors at different locations and orientations to simultaneously capture different portions of the scene. This preliminary arrangement eliminates the need for sequential scanning, allowing the system to generate a complete high-resolution overview image in real time by combining the simultaneous captures from all sensors.
3Measurement precision
If multiple image sensors with different focal lengths are used to maintain homogenized resolution, then the resolution uniformity is improved, but the device complexity increases
Solution Approach 1:
The patent assigns different focal lengths to different image sensors based on their specific functional requirements. For example, some sensors use wide-angle lenses for overview capture while others use telephoto lenses for detailed observation. This local optimization of optical properties allows each sensor to perform its specific function at maximum quality, and the control unit harmonizes these different perspectives into a unified homogenized resolution output.
4Reliability
If adjacent image areas are made to overlap to adapt to scene geometry, then the depth of field coverage is improved, but the data processing complexity increases
Solution Approach 1:
The patent implements dynamic image processing where the control unit automatically adjusts the overlapping regions and depth of field parameters based on the captured scene geometry. The system dynamically determines the optimal combination of adjacent image areas to ensure complete depth of field coverage, and this adaptive processing reduces the manual configuration complexity while maintaining high reliability.
Data Source
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AI summary
The invention relates to a monitoring device comprising: one or more cameras, each of which has a plurality of image sensors that are designed to sample different respective scene regions with a variable object distance in an object space and to generate image data of a sequence of images in a video stream, each camera having a control unit that is designed to transmit the image data of the image sensors to a network; a control device that is designed to generate a video stream and/or at least one sub-region thereof for presenting on a display device or in at least one window with a variable size, said video stream and/or sub-region being composed from the image data of the image sensors; and an input unit which is designed such that the scene region that is provided for the display and optionally the position and the size of the at least one window can be determined via said input unit; wherein each of the image sensors is equipped with an optical system such that an object space resolution that is homogenized over the entire visual field of the image sensors is provided at all times independent of the object distance.