Light Source Control for Eye Imaging Bright Spot Accuracy
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Solution Overview
Problem
In line of sight estimation techniques, switching the state of the light source during exposure time can result in unsuitable imaging results, such as a bright spot appearing when it should not, or being insufficiently bright, due to misalignment or incorrect association between the light source and the bright spot.
Innovation Solution
An information processing apparatus with a light source control unit that sets the light source to an on or off state at times when exposure is not performed, synchronized with imaging processing to ensure accurate association and brightness of the bright spot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the light source state is switched during exposure time, then the light source can be controlled to be on or off, but the imaging result of the bright spot becomes unsuitable (either appears when it should not or is insufficiently bright)
Solution Approach 1:
The patent applies preliminary action by determining the exposure time before controlling the light source. The control unit sets the light source to ON before exposure starts and OFF after exposure ends, ensuring the light source state is properly established in advance of and during the exposure process, preventing any misalignment between light emission and image capture.
Solution Approach 2:
The patent implements feedback by using the determined exposure time to adjust and control the light source timing. The control unit receives exposure time information and uses it to synchronize the light source state changes with the exposure process, creating a closed-loop control system that ensures accurate bright spot imaging.
2Device complexity
If the light source is controlled without considering exposure timing, then control is simplified, but the bright spot may appear incorrectly or with insufficient brightness due to misalignment between light source and bright spot
Solution Approach 1:
The patent merges the light source control function with the exposure timing information by integrating them in the control unit. The control unit simultaneously processes exposure time determination and light source state control, ensuring that both functions work together harmoniously to achieve accurate bright spot imaging without requiring separate complex control systems.
Solution Approach 2:
The patent applies preliminary action by determining the exposure time before controlling the light source. The control unit sets the light source to ON before exposure starts and OFF after exposure ends, ensuring the light source state is properly established in advance of and during the exposure process, preventing any misalignment between light emission and image capture.
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 approach enables more suitable imaging results by ensuring the light source state is controlled appropriately during exposure, improving the accuracy of bright spot imaging and association.
Implementation Method 1
a light source that irradiates an eye with light
Implementation Method 2
a reflection point (a bright spot) generated by the light
Data Source
AI summary
An information processing device including a light source control unit that controls a light source that irradiates an eye with light; and an exposure control unit that controls exposure for imaging the eye. The light source control unit sets a state of the light source to an on state or an off state at a time when the exposure is not performed.