Radar Imaging Policy for Clear 2D Projection of 3D Surface Data
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Solution Overview
Problem
Existing radar systems struggle to accurately detect belongings carried by a target object due to the mixing of information from multiple surfaces, leading to reduced accuracy in forming three-dimensional radar images into two-dimensional images.
Innovation Solution
A radar apparatus and method that utilizes a plurality of transmission and reception antennas, along with a projection direction/imaging policy control unit, to generate three-dimensional radar images and project them into two-dimensional images, ensuring clear display of each surface by defining specific imaging areas and antenna pairs for each projection direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a three-dimensional radar image is projected into a two-dimensional image without specifying imaging areas and antenna pairs for each projection direction, then the processing is simpler and faster, but the information from multiple surfaces is mixed leading to reduced detection accuracy
Solution Approach 1:
The patent divides the imaging process into separate segments by defining specific imaging areas and antenna pairs for each projection direction. Instead of processing the entire three-dimensional radar image at once, the system segments the image generation process to handle only the relevant surfaces for each projection direction, thereby improving detection accuracy while managing complexity through structured organization.
Solution Approach 2:
The patent applies local quality by assigning different imaging policies to different regions (imaging areas) and antenna pairs based on their specific projection directions. Each local region is processed with optimized parameters suited to its specific requirements, allowing high detection accuracy for each surface while the overall system maintains manageable complexity through localized optimization.
2Measurement precision
If multiple transmission antennas and reception antennas are used to capture comprehensive radar signals, then the imaging quality and detection capability improve, but the amount of data processing and computation cost increase
Solution Approach 1:
The patent segments the data processing by associating specific antenna pairs with specific projection directions and imaging areas. Instead of processing all antenna data uniformly, the system segments the computation to process only the relevant antenna pairs for each projection direction, reducing overall computation cost while maintaining high imaging quality through targeted processing.
Solution Approach 2:
The patent applies partial action by selectively processing data from specific antenna pairs and imaging areas rather than processing all available data exhaustively. This allows the system to achieve sufficient imaging quality for detection purposes while significantly reducing computation cost by avoiding unnecessary processing of irrelevant data.
3Ease of operation
If the radar image is formed into a two-dimensional image for easier interpretation and object recognition, then the ease of operation and automated processing improve, but the loss of three-dimensional spatial information reduces the ability to accurately detect belongings
Solution Approach 1:
The patent segments the projection process by creating separate two-dimensional images for different projection directions, each derived from specific imaging areas and antenna pairs. This segmentation allows the system to maintain spatial information integrity by ensuring that each two-dimensional projection accurately represents its corresponding three-dimensional region, thereby preserving detection accuracy while providing ease of interpretation.
Solution Approach 2:
The patent applies local quality to the projection process by ensuring that each two-dimensional image is generated from locally optimized imaging areas and antenna pairs specific to its projection direction. This local optimization preserves spatial relationships and detection accuracy in each two-dimensional view, maintaining the ability to detect belongings while improving ease of interpretation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the accuracy of detecting belongings by preventing information from opposing surfaces from being displayed, thereby improving the detection of suspicious items.
Implementation Method 1
a transmission antenna irradiates an electromagnetic wave such as a millimeter wave onto a target object (such as a human body or belongings of a subject) within a predetermined area, and a reception antenna receives the electromagnetic wave reflected on the target object, as a radar signal
Data Source
AI summary
A radar signal transmission/reception unit (103) acquires a radar signal generated by using a plurality of transmission antennas Tx and a plurality of reception antennas Rx. A projection direction/imaging policy control unit (107) holds an imaging policy. The imaging policy includes a projection direction representing a direction in which an inspection target is viewed, an imaging area indicating an area of which a three-dimensional radar image is to be generated, and set information being information on a set of pairs of a transmission antenna Tx and a reception antenna Rx for use in generation of the three-dimensional radar image. An imaging unit (104) generates the three-dimensional radar image from the radar signal in accordance with the imaging policy. A projection processing unit (106) forms the three-dimensional radar image into a two-dimensional image by projecting the three-dimensional radar image in the projection direction indicated by the imaging policy.