Laser Pointer Position Recognition for Projection Image Control
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Solution Overview
Problem
Existing projector systems require users to operate input devices like mice to perform operations on projection images, leading to process delays and limited intuitive interaction with objects within the projection image, especially when the user is near the screen.
Innovation Solution
An information processing apparatus and method that allows intuitive operation inputs to objects within a projection image by using a laser pointer, which includes a visible light imaging unit in the projector to recognize the laser pointer's position and transmit movement information for real-time object manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mouse or input device is used to operate objects in the projection image, then operation precision is improved, but process delay increases and ease of operation deteriorates when the user is near the screen
Solution Approach 1:
The patent replaces the mechanical mouse operation system with an optical laser pointer system. The projector captures the laser pointer's position on the projection screen and converts it into operation coordinates, eliminating the need for physical mouse movement and reducing process delay. The visible light imaging unit detects the laser pointer's position in real-time, providing immediate response without the mechanical delays of traditional input devices.
Solution Approach 2:
The patent introduces the projection screen and visible light imaging unit as intermediaries between the user and the computer system. The laser pointer serves as a mediator that the user can see and control on the projection screen, while the imaging unit captures this visual information and translates it into operational commands, creating a direct visual-feedback control loop that reduces delay and improves intuitiveness.
2Measurement precision
If a mouse or input device is used to operate objects in the projection image, then operation precision is improved, but ease of operation deteriorates when the user is near the screen
Solution Approach 1:
The patent replaces the mechanical mouse operation system with an optical laser pointer system. The projector captures the laser pointer's position on the projection screen and converts it into operation coordinates, eliminating the need for physical mouse movement and reducing process delay. The visible light imaging unit detects the laser pointer's position in real-time, providing immediate response without the mechanical delays of traditional input devices.
Solution Approach 2:
The system uses the projection screen itself as the operation interface. The laser pointer's position on the screen directly corresponds to the operation coordinates, and the imaging unit automatically captures and processes this information. This self-service approach eliminates the need for separate input devices and makes the operation intuitive and easy to perform when the user is near the screen.
3Device complexity
If laser pointer position is recognized based only on captured image data, then device complexity is reduced, but measurement precision deteriorates under varying brightness conditions
Solution Approach 1:
The patent applies preliminary action by setting the laser pointer detection threshold before the projection operation begins. The threshold is determined based on the ambient light conditions and projection brightness, allowing the system to accurately detect the laser pointer's position even when brightness conditions change during operation. This pre-calibration ensures consistent detection precision without requiring complex real-time adjustments.
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 and intuitive operation of objects within a projection image using a laser pointer, reducing process delays and allowing for more natural interaction with projected content.
Implementation Method 1
a visible light imaging unit (13v) which performs visible light imaging for a projection image
Data Source
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AI summary
[Object] To provide an information processing apparatus, control method, program, and storage medium capable of intuitively performing an operation input to an object within a projection image by moving a laser pointer. [Solution] There is provided an information processing apparatus including: a recognition unit which recognizes an irradiation position of laser light by a laser pointer to a projection image; an acquisition unit which acquires movement information of the laser pointer; and an output unit which outputs a control signal for causing display of an object within a projection image corresponding to the irradiation position to be changed in accordance with the movement information.