Selective 3D Building Blending for Route Visibility

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Solution Overview

Problem

In three-dimensional navigation systems, the field of view is often obstructed by 3D objects such as buildings and hills, leading to limited route visibility and degraded map display quality due to unnecessary blending processes, especially on curved roads where the route is occluded by tall structures.

Innovation Solution

A system and method that selectively removes or blends 3D objects occluding the route by using an object detector to determine intersections between 3D objects and a route guiding line, reducing data of the polyline to minimize calculations, and applying translucency effects to improve visibility while maintaining map quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If all 3D objects around crossroads are blended, then route visibility is improved, but map display quality is degraded due to unnecessary blending processing

Engineering Contradiction:

Improveroute visibilityVSAvoidmap display quality

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies blending selectively only to 3D objects that actually intersect with the route guiding line, rather than blending all objects around crossroads. The object detector determines intersection between individual 3D objects and the route, applying blending only where necessary to maintain visibility while preserving map quality in other areas.

Inventive Principle:

Principle #3Local quality

2Reliability

If 3D objects are blended to improve route visibility, then route occlusion is reduced, but computational load increases

Engineering Contradiction:

Improveroute visibilityVSAvoidcomputational load

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system performs intersection detection between 3D objects and the route guiding line to identify only those objects that actually occlude the route. Blending is applied only to these specific objects rather than all objects in the scene, significantly reducing unnecessary computational operations while maintaining route visibility.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements a selective blending approach that processes only the necessary subset of 3D objects (those intersecting the route) rather than performing excessive blending on all objects. This partial action approach reduces computational load while achieving the visibility improvement goal.

Inventive Principle:

Principle #16Partial or excessive action

3Productivity

If route guiding line data is reduced, then real-time processing speed is improved, but detection precision may be degraded

Engineering Contradiction:

Improvereal-time processing speedVSAvoidintersection detection precision

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent applies reduction processing to the route guiding line data to simplify geometric calculations and improve real-time processing speed. The object detector uses this reduced data for intersection determination with 3D objects, balancing processing efficiency with adequate detection precision for navigation purposes.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9959685B2Method and system for selectively blending buildings to improve route visibility in a 3D navigation system

Publication Date: 2018.05.01 INAVI SYSTEMS CORPORATION

AI summary

The present invention relates to a method and system for selectively blending buildings to improve route visibility in a 3D navigation system. A method for displaying a 3D map may include: detecting whether or not an object to be displayed on a map screen intersects with a route guiding line on the map screen with the object intersecting the route guiding line being blended therewith.