Stage Light Fixture Calibration via Camera-Based Coordinate Deduction
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Solution Overview
Problem
Existing methods for calibrating the position and orientation of stage light fixtures are prone to operational deviations due to manual adjustments, leading to inconsistent and unstable calibration precision.
Innovation Solution
A method involving the acquisition of light spot images and angle information when light beams project onto multiple stage positions, followed by calculating and deducing coordinates to establish a calibration equation set, which is solved using a nonlinear optimization algorithm to determine the calibrated position and orientation of the stage light fixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment method is used to align light beam center lines with positioning sensors, then the calibration process can be completed, but operational deviation occurs and calibrating accuracy becomes unstable
Solution Approach 1:
The patent replaces the manual mechanical adjustment system with an automated optical detection system. A camera captures images of light spot centers, and a computer automatically calculates the light beam center line projection points and performs coordinate transformations. This substitution eliminates manual operational deviations and achieves stable, high-precision calibration results through automated image processing and mathematical computation.
2Ease of operation
If visual estimation is used to align light beams with positioning sensors, then the calibration can be performed, but inconsistent operation results in poor calibration precision
Solution Approach 1:
The patent creates a digital copy of the physical light spot positions through camera imaging. Instead of relying on visual estimation of invisible light beam center lines, the system captures actual light spot images, extracts center coordinates through image processing, and uses these digital representations for precise calibration calculations. This copying approach ensures consistent and reliable results by replacing subjective visual judgment with objective digital measurement.
3Measurement precision
If automated image-based method is used to detect light spot centers and calculate coordinates, then operational deviation is eliminated, but measurement and calculation complexity increases
Solution Approach 1:
The patent introduces a camera as an intermediary device between the light beams and the detection system. The camera captures light spot images, which serve as intermediaries that contain encoded position information. Through image processing, the center coordinates of light spots are extracted, and coordinate transformation formulas convert these image coordinates to real-world stage coordinates. This intermediary approach simplifies the measurement process while maintaining high precision.
Solution Approach 2:
The patent replaces complex manual mechanical alignment procedures with automated computational methods. Instead of physically adjusting light fixtures based on visual estimation, the system uses camera imaging, image processing algorithms, and coordinate transformation mathematics to automatically determine precise positions. This substitution reduces operational complexity while improving measurement precision through automated calculation.
Data Source
AI summary
A method for calibrating position and orientation of a stage light fixture includes acquiring light spot images and light fixture angle information when light beams of the stage light fixture respectively project on at least three different positions, and calculating first coordinates of a light beam center line projection point image in each of the light spot images in a camera coordinate system; deducing second coordinates of a light beam center line projection point on the stage in a stage coordinate system based on the first coordinates and information about internal parameters and a position and an orientation of a camera when the light spot images are acquired, and recording corresponding relationship between the second coordinates and the light fixture angle information; and determining a calibrated position and orientation of the target stage light fixture based on the second coordinates, the light fixture angle information and the corresponding relationship.