Aircraft Projector Self-Calibration via Stored Geometrical Data
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Solution Overview
Problem
Existing methods for projecting images in aircraft passenger cabins require external intervention and sensor systems, such as cameras, to adjust for distortion, which is inconvenient and costly, especially when setting up projectors in known configurations before operation.
Innovation Solution
A method where a projector receives geometrical data to determine predistortion data using an imaging rule, allowing it to autonomously set up and store these data for rectified image projection without external intervention, using known configuration and relative position data, eliminating the need for cameras or sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If external camera systems and sensors are used for distortion adjustment, then image projection accuracy can be improved, but device complexity and cost increase
Solution Approach 1:
The projector determines its own mounting position and orientation autonomously by processing images captured by an integrated camera, eliminating the need for external sensors or cameras. The projector performs self-calibration by comparing the captured ceiling image with stored reference images, automatically calculating correction data without external intervention.
Solution Approach 2:
The camera is integrated directly into the projector unit, combining the projection function and the detection function into a single device. This eliminates separate external camera systems and reduces overall system complexity while maintaining the ability to capture images for position determination.
2Manufacturing precision
If external intervention is required for projector setup, then precise adjustment can be achieved, but ease of operation deteriorates
Solution Approach 1:
The projector automatically determines its mounting position and calculates correction data without requiring external intervention. The system autonomously captures ceiling images, compares them with reference images, computes the mounting position, and generates correction data that is stored and applied automatically.
Solution Approach 2:
Reference images of the ceiling are stored in advance in the projector's memory before actual operation. These pre-stored reference images enable the projector to perform automatic comparison and position determination without requiring external calibration equipment or manual intervention during setup.
3Adaptability or versatility
If predistortion data are determined during regular operation, then adaptability is improved, but productivity deteriorates
Solution Approach 1:
The projector determines mounting position and generates correction data automatically during the initial setup phase before regular operation begins. This preliminary automatic setup eliminates the need for time-consuming manual calibration during actual use, improving both setup efficiency and operational readiness.
Data Source
AI summary
A method for setting up a projector (10) for a passenger cabin (4) of an aeroplane (2), wherein the passenger cabin (4) comprises a projection surface (14) with a known configuration (G) and the projector (10) in the passenger cabin (4) is in a known relative position (RP) with respect to the projection surface (14) in a mounting position (M), geometrical data (16) relating to the configuration (G) and relative position (RP) are received by the projector (10), and predistortion data (22) are determined from the geometrical data (16) according to an imaging rule (18) in order to predistort the images (12) and represent them as rectified images (12″) on the projection surface, and the projector (10) is set up by storing the predistortion data (22) in the projector (10).A projector (10) contains an imaging rule (18) and an input (20) for geometrical data (16), and is configured to carry out the method according to the invention and, during operation when set up, to predistort images (12) with the aid of the predistortion data (22) and to project them.A passenger cabin (4) having at least one projector (10) and at least one projection surface (14) has at least one of the projectors (10) according to the invention.