Wavelength-Specific Mirror for 3D Body Scanning
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Solution Overview
Problem
Existing 3D scanning technologies for garment fitting require a separate scan area with dimmed ambient light and visible scanning equipment, creating a different experience from a standard fitting room, and struggle to provide a clear mirror image while capturing accurate 3D data without generating unwanted light effects.
Innovation Solution
A 3D measuring device integrated into a standard mirror using a wavelength-specific mirror that transmits at least 70% of infrared wavelengths, allowing image capturing and projection behind the mirror, which reflects visible light and projects structured infrared light for accurate 3D data capture without altering the fitting room environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a semi-transparent mirror is used to position the camera behind the mirror, then the camera can capture images through the mirror, but the mirror image quality deteriorates due to reduced light reflection
Solution Approach 1:
The system separates visible light and infrared light paths using a wavelength-specific mirror. The mirror reflects visible light to provide a clear mirror image while transmitting infrared light to allow the camera to capture images. This segmentation of light wavelengths resolves the contradiction by enabling both functions simultaneously without compromise.
Solution Approach 2:
The invention changes the operational parameter from using a semi-transparent mirror (which compromises visible light reflection) to using a wavelength-specific mirror that selectively transmits infrared light while reflecting visible light. This parameter change in the mirror's optical properties resolves the contradiction between camera access and mirror image quality.
2Illumination intensity
If structured light is projected through a semi-transparent mirror to illuminate the subject, then the light reaches the subject, but most of the light is lost due to the mirror's limited transparency
Solution Approach 1:
The system segments the lighting function by using a separate infrared projector that projects structured infrared light directly onto the subject without passing through the mirror. This eliminates the light loss problem associated with transmitting light through a semi-transparent mirror, as the infrared light path is independent of the visible light mirror.
Solution Approach 2:
The invention changes the wavelength parameter of the projected light from visible to infrared, and positions the projector behind the mirror to project directly onto the subject. This parameter change eliminates the need for light to pass through the mirror twice, resolving the energy loss contradiction.
3Loss of information
If visible light is used for 3D scanning, then the scanning process is visible to the user, but unwanted light effects and flashes are generated in the fitting room environment
Solution Approach 1:
The invention changes the wavelength parameter of the structured light from visible to infrared. This allows the 3D scanning process to proceed with structured light projection and capture, but the infrared light is invisible to the human eye, eliminating unwanted light effects and flashes in the fitting room environment while maintaining scan functionality.
Solution Approach 2:
The system uses infrared light as an invisible copy of visible light for the scanning process. The infrared structured light performs the same measurement function as visible light would, but without the harmful visible light effects, and the infrared camera captures the reflected infrared patterns to reconstruct the 3D model.
4Measurement precision
If cameras are positioned around or move around the person to obtain complete scan data, then complete 3D coverage is achieved, but the device complexity and space requirements increase
Solution Approach 1:
The invention adds the wavelength dimension to the optical system by using a wavelength-specific mirror that transmits infrared light while reflecting visible light. This allows the camera to be positioned behind the mirror in a fixed location, capturing complete 3D data through the mirror without requiring multiple cameras or movement, thus resolving the contradiction between scan completeness and device complexity.
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 seamless integration of 3D scanning into a standard fitting room with a clear mirror image, no unwanted light effects, and complete 3D data capture, allowing for accurate garment fitting advice without the need for separate scanning areas or equipment.
Implementation Method 1
a wavelength specific mirror characterized in that said image capturing means is positioned behind said wavelength specific mirror, and in that said wavelength specific mirror is only efficient in transmitting electromagnetic waves with wavelengths in a range outside of the visible spectrum, and in the infrared spectrum
Data Source
AI summary
The present invention relates to a fitting room mirror including image capturing means and image processing means enabling the determination of body dimensions and in providing cloth-fitting advice to the user.