Movable Multi-Fisheye Imaging System for Rapid 3D Reconstruction

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Solution Overview

Problem

Creating three-dimensional reconstruction models for large-scale objects or spaces is time-consuming and costly due to the need for extensive apparatus and long data acquisition times, making it difficult to repeatedly create such models.

Innovation Solution

An imaging system comprising multiple imaging bodies with synchronized fisheye lenses and a moving part that allows for efficient acquisition of images from different viewpoints, enabling rapid data collection and reducing the need for large-scale apparatus.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If conventional large-scale laser apparatus and camera apparatus are used to create three-dimensional reconstruction models, then measurement precision and coverage area are improved, but acquisition time and device complexity increase significantly

Engineering Contradiction:
Improvecoverage areaVSAvoidacquisition time
Core Design Contradiction:
Area of stationary objectVSLoss of time

Solution Approach 1:

The imaging system is divided into multiple imaging bodies (first imaging body with first optical element, second imaging body with second optical element) that can be moved independently along the straight line. Each imaging body captures images of different hemispheres, and by segmenting the imaging task across multiple bodies and positions, the system achieves comprehensive coverage of large-scale areas without requiring a single large-scale apparatus, thereby reducing acquisition time while maintaining measurement precision.

Inventive Principle:
Principle #1Segmentation

2Measurement precision

If multiple imaging bodies are used to capture images from different viewpoints, then three-dimensional reconstruction quality is improved, but device complexity and cost increase

Engineering Contradiction:
Improvethree-dimensional reconstruction qualityVSAvoiddevice complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent merges the functions of multiple imaging bodies into a single integrated moving assembly that travels along a straight line. The first imaging body and second imaging body are combined in one moving unit, allowing them to capture images of opposite hemispheres simultaneously at each position. This merging approach achieves the three-dimensional reconstruction quality needed while reducing device complexity compared to using separate, independent imaging systems.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The imaging bodies are arranged and moved along a straight line in one dimension, capturing images of hemispheres in opposite directions. By utilizing this linear dimensional arrangement and the directional property of the optical elements, the system achieves comprehensive three-dimensional coverage without requiring complex multi-axis positioning systems, thereby reducing device complexity while maintaining measurement precision.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Area of stationary object

If conventional imaging systems are used, then comprehensive spatial coverage is achieved, but acquisition time becomes excessively long for repeated measurements

Engineering Contradiction:
Improvespatial coverageVSAvoidrepeated measurement capability
Core Design Contradiction:
Area of stationary objectVSProductivity

Solution Approach 1:

The imaging bodies are designed to be movable along a straight line rather than fixed in position. This dynamic configuration allows the imaging system to efficiently traverse the measurement area, capturing comprehensive spatial data quickly. The movable design enables repeated measurements to be performed rapidly by simply repositioning the imaging bodies along the same trajectory, significantly improving productivity compared to static conventional systems.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The first and second imaging bodies capture images of opposite hemispheres simultaneously and continuously as they move along the straight line. This continuous imaging action ensures that comprehensive spatial coverage is achieved in a single pass without gaps or interruptions, eliminating the need for multiple separate measurement campaigns and enabling efficient repeated measurements.

Inventive Principle:
Principle #20Continuity of useful action

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

Facilitates the easy acquisition of images for creating three-dimensional reconstruction models, reducing the time and cost associated with data collection while maintaining high precision.

Implementation Method 1

a first optical element that images a range containing a hemisphere that is centered at an optical axis and oriented in a first direction of the optical axis

Methodology Applied
Scientific EffectOptical imaging: Lens

Implementation Method 2

a second optical element that images a range containing a hemisphere that is centered at the optical axis and oriented in a second direction opposite to the first direction

Methodology Applied
Scientific EffectOptical imaging: Lens

Data Source

PatentUS10992879B2Imaging system with multiple wide-angle optical elements arranged on a straight line and movable along the straight line
Publication Date: 2021.04.27 RICOH CO LTD
  • US10992879B2 patent drawing
  • US10992879B2 patent drawing
  • US10992879B2 patent drawing

AI summary

An imaging system includes a plurality of imaging bodies, a moving part, and an imaging control unit. Each of the imaging bodies includes a first optical element that images a range containing a hemisphere that is centered at an optical axis and oriented in a first direction of the optical axis, and a second optical element that images a range containing a hemisphere that is centered at the optical axis and oriented in a second direction opposite to the first direction. The imaging bodies is arranged in a direction orthogonal to the optical axis. The moving part moves the imaging bodies on a straight line. The imaging control unit is configured to cause the imaging bodies to perform imaging in synchronization with each other, and acquire a taken image from each of the imaging bodies.