Dynamic 3D Projection Model for Work Vehicle Surroundings
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Solution Overview
Problem
Existing display systems for work vehicles struggle to accurately represent the shape of the surrounding environment in bird's-eye view images due to the use of fixed hemispherical projection models, which fail to depict inclined or uneven ground surfaces effectively.
Innovation Solution
A display system that incorporates a camera, shape sensor, and controller to generate a three-dimensional projection model based on measured 3D shape data, allowing images to be projected onto a model that accurately represents the surrounding environment's shape, including inclinations and unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed hemispherical projection model is used, then the system structure is simple, but the accuracy of representing the actual surrounding environment shape deteriorates
Solution Approach 1:
The projection model is transformed from a fixed hemispherical shape to a dynamic three-dimensional model that adapts to the actual surrounding environment. The controller generates a projection model whose shape corresponds to the measured 3D shape data, allowing the model to dynamically reflect real-world terrain features such as slopes and elevations rather than forcing all images onto a rigid hemispherical surface.
Solution Approach 2:
The system changes the geometric parameters of the projection model based on measured environmental data. Instead of using a standard hemispherical projection with fixed parameters, the controller adjusts the projection model's shape parameters to match the actual 3D shape data acquired by the shape sensor, thereby improving the accuracy of environment representation.
2Ease of operation
If a fixed hemispherical projection model is used, then the processing complexity is low, but the ease of understanding the actual environment shape deteriorates
Solution Approach 1:
The projection model adapts its shape to match the actual surrounding environment, creating a dynamic representation that intuitively reflects real-world terrain. This makes it easier for users to understand the actual environment shape because the projection model visually corresponds to the physical landscape, including slopes and elevations, rather than distorting them onto a fixed hemispherical surface.
Solution Approach 2:
The system creates an accurate copy of the actual surrounding environment's three-dimensional shape in the projection model. By generating a projection model whose shape corresponds to the measured 3D shape data, the system produces a visual representation that faithfully replicates the real-world terrain features, making it easier for users to comprehend the actual environment.
3Manufacturing precision
If image data is projected onto a flat projection plane, then the processing is simple, but the accuracy of depicting inclined or uneven ground surfaces deteriorates
Solution Approach 1:
The system transitions from two-dimensional flat plane projection to three-dimensional projection modeling. By generating a projection model with actual three-dimensional shape corresponding to the measured environment, the system preserves elevation and slope information that would be lost in flat projection, enabling accurate depiction of inclined or uneven ground surfaces through the addition of the third dimension.
Solution Approach 2:
The projection system changes from using a flat plane with constant parameters to a three-dimensional model with variable parameters that reflect the actual ground surface geometry. The controller generates a projection model whose shape parameters are derived from the measured 3D shape data, allowing accurate representation of terrain variations including slopes and elevations.
Data Source
AI summary
The camera captures an image of a surrounding environment of a work vehicle and outputs image data indicative of the image. The shape sensor measures a three-dimensional shape of the surrounding environment and outputs 3D shape data indicative of the three-dimensional shape. A controller acquires the image data and the 3D shape data. The controller generates a three-dimensional projection model based on the 3D shape data. The three-dimensional projection model portrays the three-dimensional shape of the surrounding environment. The image is projected onto the three-dimensional projection model based on the image data, thereby generating display image data that represents a display image of the surrounding environment of the work vehicle.