Directional Light Reference for Accurate Articulating Device Imaging
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Solution Overview
Problem
Current digital cameras in articulating devices, such as robots, lack the detail and dynamic range of the human eye and struggle with accurately capturing images in various lighting conditions, particularly backlit subjects and mixed lighting environments, due to their reliance on trial-and-error exposure methods and inability to interpret complex lighting scenarios.
Innovation Solution
The integration of a directional light reference, such as a digital gray card, on an articulable appendage of the device, which is positioned to reflect light to the camera system at an angle similar to the subject, allowing for accurate white balance and exposure adjustment, enabling the device to capture images with enhanced detail and dynamic range similar to human vision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If trial-and-error exposure methods are used in digital cameras, then the device complexity is reduced, but the measurement precision of lighting conditions deteriorates
Solution Approach 1:
The system performs preliminary action by having the articulable appendage position a light reference card at the subject location before capturing the photographic image. This preliminary positioning allows the camera to obtain accurate white balance and exposure information in advance, eliminating the need for complex real-time lighting analysis during image capture.
Solution Approach 2:
The light reference card served on the articulable appendage acts as an intermediary element between the light source and the camera sensor. By positioning this reference card at the subject location, the system obtains indirect information about the lighting conditions that would otherwise require complex direct measurement, simplifying the camera system while improving measurement precision.
2Measurement precision
If additional hardware is added to improve image quality, then the measurement precision of lighting conditions improves, but the device complexity increases
Solution Approach 1:
The articulable appendage is designed with multi-functionality, serving both as a positioning mechanism and as a carrier for the light reference card. This universal design allows the same hardware component to perform multiple functions: articulating to position the camera, positioning the light reference, and potentially serving as part of the imaging system, thereby improving white balance accuracy without proportionally increasing device complexity.
Solution Approach 2:
The system employs self-service by using the articulable appendage's own structure and positioning capabilities to deploy and position the light reference card at the subject location. The appendage essentially services its own function of lighting measurement without requiring separate dedicated hardware, thereby improving measurement precision while minimizing additional complexity.
3Measurement precision
If the articulable appendage positions the light reference at the subject location, then the measurement precision of lighting conditions improves, but the ease of operation deteriorates
Solution Approach 1:
The system implements feedback by using the captured image of the light reference card to automatically determine exposure values and white balance settings. The control system processes the reference card image and automatically adjusts camera parameters, providing feedback that eliminates the need for manual lighting assessment and simplifies operation despite the added articulation step.
Solution Approach 2:
The preliminarily positioned light reference card enables automatic exposure and white balance determination before the actual subject photograph is taken. This preliminary measurement step, automated through the articulable appendage positioning system, simplifies the overall operation by removing the need for manual lighting condition assessment and parameter adjustment by the user.
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
This solution allows articulating devices to obtain accurate and high-quality photographic images without additional hardware, maintaining a natural interaction with subjects and improving image quality in challenging lighting conditions, ensuring correct exposure and color representation.
Implementation Method 1
the directional light reference is positioned to reflect light to the camera system at an angle at a plane substantially the same as the subject is at the subject location
Data Source
AI summary
Articulating devices and processes for obtaining photographic images with the articulating device generally include providing the articulating device with a directional light reference for use in photographically obtaining an accurate rendition of a subject being photographed. In this manner, an incidental light reference at the subject location is provided prior to capturing an image of the subject.