3D Modeling Device for Obstructed Structures

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Solution Overview

Problem

Existing three-dimensional modeling technologies struggle to produce accurate models of structures when parts are obstructed by large objects, as they fail to measure and model regions effectively after changes like interior renovations or installations.

Innovation Solution

A modeling device comprising a receiver, face extractor, vertex extractor, and model producer that obtains three-dimensional coordinates, generates plane equations, calculates shared vertices, and produces model information, allowing for the estimation and compensation of obstructed regions by recalculation based on measurement points within a prescribed distance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If three-dimensional measurements are taken using a measurement device, then measurement data of the three-dimensional structure is obtained, but regions obstructed by large objects cannot be measured accurately

Engineering Contradiction:

Improvemeasurement precision of three-dimensional structureVSAvoiddifficulty of measuring obstructed regions

Core Design Contradiction:

Measurement precisionVSDifficulty of detecting and measuring

Solution Approach 1:

The system performs preliminary classification of measurement points into structure points and object points based on plane equation matching before final model generation. This preliminary action allows the system to identify and separate obstructing objects from the target structure, enabling accurate measurement of previously unmeasurable regions by processing structure points independently of obstructing objects.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The measurement data is segmented into structure points and object points through classification based on plane equation analysis. This segmentation separates the target three-dimensional structure from obstructing large objects, allowing the measurement system to accurately process and model only the structure points while excluding object points that cause measurement obstruction.

Inventive Principle:

Principle #1Segmentation

2Reliability

If existing modeling technologies are used to extract structure lines, then structure lines can be detected from images, but accurate model production is impossible when regions are obstructed by large objects

Engineering Contradiction:

Improvereliability of structure line extractionVSAvoidprecision of three-dimensional model production

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The system performs preliminary classification of measurement points into structure points and object points before generating the three-dimensional model. This preliminary action ensures that only structure points (belonging to the target building or structure) are used for model production, while object points (belonging to obstructing large objects) are excluded, thereby maintaining both reliable structure line extraction and high manufacturing precision of the final model.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of trying to detect structure lines directly from images and then removing object interference, the system inverts the approach by first classifying all measurement points into structure and object categories, then using only the classified structure points for model generation. This inverted approach ensures that obstructing objects do not contaminate the structure line extraction and final model production.

Inventive Principle:

Principle #13The other way round (Inversion)

3Adaptability or versatility

If interior objects are removed for renovations, then wallpaper changes or heat insulator installations can be performed, but existing technologies cannot produce models after object removal

Engineering Contradiction:

Improveadaptability to renovation scenariosVSAvoidprecision of model after object removal

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The system performs preliminary classification of measurement points into structure points and object points before any renovation or object removal occurs. This preliminary action creates an accurate baseline model of the three-dimensional structure that is independent of temporary or removable objects. When objects are removed for renovations such as wallpaper changes or heat insulator installations, the pre-classified structure points ensure that the model remains accurate and can be reliably used for renovation planning and execution.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9984177B2Modeling device, three-dimensional model generation device, modeling method, program and layout simulator

Publication Date: 2018.05.29 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A modeling device obtains three-dimensional coordinates from a measurement device for taking three-dimensional measurements of the three-dimensional structure having faces to produce model information of the three-dimensional structure, and includes a face extractor, a vertex extractor and a model producer. The face extractor produces a plane equation describing a face based on coordinates of each measurement point of the face. The vertex extractor extracts a point simultaneously satisfying plane equations describing adjoining faces as a vertex shared among the faces. The model producer produces model information representing the three-dimensional structure based on plane equations and vertexes. The face extractor determines a plane equation by recalculation based on measurement points existing in a range of a prescribed distance from a plane candidate.