Information Code Display Using Opposite Luminance Changes for Event Cameras
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Event cameras struggle to capture information codes when there is no relative movement between the camera and the code due to lack of luminance change, rendering them ineffective for stationary codes.
Innovation Solution
A display control unit adjusts the luminance of light and dark color cells in opposite directions to generate event data, enabling the event camera to capture information codes even in stationary conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the information code is displayed statically on the display screen, then the display is simple and energy-efficient, but the event camera cannot capture the code due to lack of luminance change
Solution Approach 1:
The patent applies dynamics by transitioning the static display into a dynamic one where luminance values of light color cells and dark color cells change in opposite directions over time. This creates temporal variation in luminance that enables event cameras to detect and capture the information code, resolving the contradiction between simple static display and reliable capture capability.
Solution Approach 2:
The patent changes the luminance parameter of the display screen dynamically. By controlling the display unit to adjust luminance values of different cell types in opposite directions, the system creates detectable luminance changes that enable event camera capture while maintaining the informational content of the code.
2Reliability
If luminance of light color cells and dark color cells is changed in opposite directions, then event camera can detect and capture the code, but energy consumption increases
Solution Approach 1:
The patent implements periodic action by cycling the luminance changes between light color cells and dark color cells. The display control unit alternates between different luminance states, creating periodic luminance variations that enable event camera detection while limiting total energy consumption compared to continuous high-luminance display.
Solution Approach 2:
The system changes luminance parameters dynamically but efficiently by only adjusting values when necessary for detection. The display control unit modifies luminance of light and dark color cells in opposite directions only during capture cycles, reducing overall energy consumption while maintaining capture reliability.
3Adaptability or versatility
If the display shows traditional static information codes, then any camera can read it, but event cameras cannot capture it without relative movement
Solution Approach 1:
The patent utilizes color changes by manipulating luminance values of light color cells and dark color cells in opposite directions. This creates dynamic luminance variations that are specifically detectable by event cameras through their change-detection mechanism, while maintaining compatibility with traditional cameras that can capture the visual information.
Solution Approach 2:
The system introduces dynamic luminance changes to the traditionally static information code display. By making the luminance of light and dark color cells vary over time in opposite directions, the display becomes adaptable to event camera detection mechanisms while preserving the code's information content for various camera types.
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
The solution allows event cameras to generate readable image data from information codes by detecting positive and negative luminance changes, ensuring capture without movement, and enhances security by making the code recognizable only to event cameras.
Implementation Method 1
change a luminance of a light color display area, in which the light color cells are to be displayed, from a luminance of a predetermined initial display screen in a certain direction, and change a luminance of a dark color display area, in which the dark color cells are to be displayed, from the luminance of the predetermined initial display screen in an opposite direction to the certain direction
Data Source
AI summary
A display control unit executes an information code display process in which a display unit is controlled to change a luminance of a light color display area, in which light color cells are to be displayed, from a luminance of a predetermined initial display screen on the display unit in a certain direction, and to change a luminance of a dark color display area, in which dark color cells are to be displayed, from the luminance of the predetermined initial display screen in an opposite direction to the certain direction.