Projection Control Unit for Accurate Drawing on Curved Surfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In drawing systems where the calibration plane and drawing surface differ, there is a mismatch between the position of the drawing tool on the drawing surface and the projected drawing information due to the use of a projective transformation matrix calculated for the calibration plane, leading to inaccurate projection.
Innovation Solution
An information processing device and method that controls the projection of drawing information based on ratio information between a first distance from a reference point to the drawing tool and a second distance from the reference point to the intersection point between the drawing tool and the calibration plane, allowing for real-time calculation of a specialized projective transformation matrix to correct for depth differences and prevent mismatches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a projective transformation matrix is calculated using the drawing surface as a calibration plane, then the position matching is accurate when the drawing surface and calibration plane coincide, but position mismatch occurs when they differ
Solution Approach 1:
The calibration process is segmented into two distinct stages: first calibrating on a calibration plane to establish baseline parameters, then separately measuring the depth information of the actual drawing surface. This segmentation allows the system to handle different planes without requiring recalibration, resolving the contradiction between position accuracy and adaptability.
Solution Approach 2:
Depth information from the imaging device serves as an intermediary parameter that bridges the calibration plane and drawing surface. By introducing this intermediate measurement, the system can transform coordinates accurately between different planes without direct recalibration, maintaining position matching accuracy across versatile surfaces.
2Loss of time
If calibration is performed solely on the calibration plane, then the calibration process is simple and quick, but position mismatch occurs on surfaces with different depths
Solution Approach 1:
The system performs preliminary calibration on a standard calibration plane once, storing the resulting parameters for reuse. This preliminary action eliminates the need for repeated full calibrations, saving time while maintaining accuracy through subsequent depth-based adjustments for different drawing surfaces.
Solution Approach 2:
Instead of recalibrating the entire system for each surface, the method changes only the depth parameter by measuring the distance from the imaging device to the drawing surface. This selective parameter adjustment maintains position accuracy while minimizing calibration time and complexity.
3Adaptability or versatility
If the drawing surface is non-flat or curved, then the system can accommodate various surface types, but position mismatch increases due to depth variations
Solution Approach 1:
The system dynamically adjusts the projection parameters based on real-time depth measurements of the drawing surface. By making the projection adaptive to the actual surface geometry rather than assuming a fixed plane, the system maintains position accuracy across diverse surface types including non-flat and curved surfaces.
Solution Approach 2:
The imaging device provides feedback about the actual depth and position of the drawing surface, which is used to correct projection parameters. This feedback loop ensures that even on non-flat or curved surfaces, the projected drawing information accurately matches the drawing tool position.
Data Source
AI summary
An information processing device comprising a projection control unit that controls projection of drawing information, the projection being performed by a projection device, on a basis of ratio information between a first distance and a second distance, the first distance being acquired from sensing information regarding a drawing tool and being from a reference point to the drawing tool, and the second distance being from the reference point to an intersection point between a straight line connecting the reference point with the drawing tool and a calibration plane.