Specular Reflection Image Capture for Full-Surface 3D Gloss Modeling
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Solution Overview
Problem
Generating a three-dimensional model that includes a gloss state of an imaging target is challenging due to the difficulty in determining the positions from which specular reflection images of all surfaces, especially when the target has a complex surface shape such as a curved surface.
Innovation Solution
An image capture system comprising a portable device with a light source, camera, and distance measurer (like LiDAR) that assists in capturing specular reflection images by determining optimal positions and orientations for image capture, guiding the user or automatically capturing images when the specular reflection condition is met, and distinguishing between captured and uncaptured areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If images are captured from multiple positions to capture specular reflection images of all surfaces, then the completeness of capturing gloss state is improved, but the complexity of determining capture positions increases
Solution Approach 1:
The system uses the image capturer's own distance measurer and shape data to automatically determine capture positions and orientations that satisfy specular reflection conditions, eliminating the need for external guidance or manual calculation. The processor autonomously calculates appropriate positions based on the measured distance and shape information.
Solution Approach 2:
Before actual image capture, the system pre-calculates and determines the appropriate positions and orientations for capturing specular reflection images based on the imaging target's shape and distance data. This preliminary determination of capture parameters enables systematic and complete coverage of all surfaces.
2Manufacturing precision
If the image capturer moves to precise positions to capture specular reflection images, then the accuracy of gloss state reproduction is improved, but the ease of operation deteriorates
Solution Approach 1:
The system continuously monitors the imaging target's distance and shape using the distance measurer, and the processor provides real-time feedback by determining and notifying the user of appropriate capture positions and orientations. This feedback mechanism guides the user to the correct positions without requiring precise manual calculation or adjustment.
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
Enables exhaustive capture of specular reflection images from all surfaces, allowing for the generation of a three-dimensional model that accurately reproduces the gloss state of the imaging target, even with complex shapes.
Implementation Method 1
a specular reflection image refers to an image captured in a state where light radiated from a light source is reflected from a certain part of an imaging target and specularly reflected light as a component of the reflected light is directly incident on a camera
Implementation Method 2
a measurer capable of measuring a distance between the image capturer and an imaging target
Data Source
AI summary
An image capture system includes a portable image capturer including a light source, a camera, and a measurer capable of measuring a distance between the image capturer and an imaging target and a shape of the imaging target, and a processor configured to measure the distance between the image capturer and the imaging target and the shape of the imaging target, and assist a user in capturing specular reflection images when the image capturer has moved to a position and an orientation with which an area of a surface of the imaging target whose distance and shape have been measured is in a specular reflection condition at a time of capture of an image of the imaging target by the image capturer.