Projector Distance Calculation Using Imager Triangulation
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Solution Overview
Problem
Existing projector systems lack efficient methods to accurately calculate distances between projectors and projection target surfaces, which affects the precision and alignment of projected images.
Innovation Solution
A projector system comprising a first projector that projects an image, a second projector, and a control box that communicates position information and captured image data to calculate distances between the projectors and the projection target surface, using triangulation methods and angle information to determine accurate projection distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple projectors are used to project images, then image coverage area is improved, but device complexity and volume increase
Solution Approach 1:
The patent combines multiple projectors into a coordinated system where projectors share position information and work together to project images onto different areas of the same projection surface. The control unit integrates the operations of multiple projectors, allowing them to function as a unified system rather than separate devices, thereby expanding coverage while managing complexity through centralized control.
2Manufacturing precision
If distance calculation methods are added to improve projection precision, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical measurement systems with optical-based distance calculation methods. By using the imager to capture images of the projection surface and calculating distances through image processing and triangulation mathematics, the system achieves precise distance measurement without adding mechanical measuring devices, thereby maintaining projection precision while avoiding increased device complexity.
3Measurement precision
If separate distance measurement devices are added, then measurement precision is improved, but device complexity and volume increase
Solution Approach 1:
The patent makes the imager serve multiple functions: it acts as both the imaging device for capturing projection surface information and as the basis for distance measurement through image processing. The same imager that captures the projection area is also used to calculate distances to the projection surface, eliminating the need for separate measurement devices and achieving multi-functionality within the existing system components.
4Measurement precision
If more devices are used for accurate distance calculation, then measurement precision is improved, but volume and cost increase
Solution Approach 1:
The system uses its own imager and projection capabilities to perform distance measurements. The projector-imager combination measures distances to the projection surface using the light already being projected and captured, without requiring external measurement devices. This self-service approach achieves accurate distance calculation while minimizing additional system volume and cost.
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 system achieves precise distance calculations between projectors and projection surfaces, enhancing image alignment and reducing the number of devices needed, thereby reducing volume and cost while improving the degree of freedom in projector configurations.
Implementation Method 1
an imager that captures an image of a projection target surface on which another projector projects an image
Data Source
AI summary
A projector includes a first projection unit that projects a first image, a first imager that captures a second image projected by another projector, and a first calculation unit. The first calculation unit calculates, from captured image data of the second image captured by the first imager and interval information indicating an interval between the other projector and the projector, a first distance between a surface on which the second image is projected and the other projector, or a second distance between an area in which the second image is projected and the projector. The first projection unit controls projection of the first image based on the first distance or the second distance.