Navigation Trajectory Color Coding for Overlap Distinction
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Solution Overview
Problem
Existing navigation systems face difficulties in distinguishing overlapping trajectories, particularly when multiple anti-parallel trajectories are displayed simultaneously, as they become illegible when attempts are made to differentiate them using thinner lines or smaller symbols.
Innovation Solution
A navigation device and graphical display method that utilize color mapping information to assign unique colors to each trajectory based on its local direction, allowing opposing directions to have contrasting colors, thereby making them easily distinguishable even when trajectories overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple trajectories are displayed simultaneously, then comprehensive trajectory information is provided, but the trajectories become difficult to distinguish when they overlap
Solution Approach 1:
The patent applies local quality by assigning different visual properties (colors, line styles, transparency levels) to different segments of trajectories based on their local characteristics such as direction, speed, or trajectory ID. This allows overlapping trajectories to be distinguished by their local visual attributes rather than requiring global differentiation.
Solution Approach 2:
The patent utilizes color changes as a primary differentiating mechanism. Each trajectory is assigned a distinct color or color pattern that remains consistent or varies systematically along the trajectory path. This allows users to visually trace and distinguish multiple trajectories even when they overlap spatially.
2Quantity of substance
If thinner lines are used to represent multiple trajectories, then more trajectories can be displayed, but the trajectories become illegible
Solution Approach 1:
Instead of relying solely on line thickness, the patent uses color variations to encode trajectory information. This allows multiple trajectories to be displayed with adequate line thickness while maintaining distinguishability through color coding, thus preserving legibility while increasing the number of displayable trajectories.
Solution Approach 2:
The patent adds the color dimension to the visual representation of trajectories. Rather than competing in the same visual dimension (line thickness), trajectories are differentiated along a new dimension (color), allowing more trajectories to be displayed without reducing line thickness to illegible levels.
3Quantity of substance
If smaller symbols are used to indicate trajectory features, then more trajectory information can be displayed, but the symbols become harder to see
Solution Approach 1:
The patent uses color-coded symbols and features along the trajectories instead of relying on symbol size for differentiation. This allows smaller, more numerous features to be displayed while maintaining visibility through color contrast and variation.
Solution Approach 2:
Different visual properties are applied to different parts of the trajectory representation. Symbols and features vary in color, shape, or intensity based on local trajectory characteristics, allowing dense information display without sacrificing the visibility of individual features.
Data Source
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AI summary
This invention relates to a navigation device (200) comprising a processor (210); and a store (230) containing map data, wherein the map data comprises a temporally-variable feature and the processor (210) is arranged, in a route planning process, to determine a status of the temporally-variable feature according to temporal information.