Multi-dimensional Image Projection Apparatus Calibration
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Solution Overview
Problem
Smart projection apparatuses face challenges in image calibration due to their portable nature, leading to image shifting, distortion, rotation, or improper sizing on the projection surface, as existing technologies fail to effectively address these issues.
Innovation Solution
A multi-dimensional image projection apparatus equipped with an image-processing circuit that performs linearity transformation and inverse image warping processes based on sensor information, along with a matrix transformation and adaptive filtering to generate a calibrated output image, ensuring accurate projection onto a surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If smart projection apparatuses are made portable, then ease of operation is improved, but image calibration quality deteriorates
Solution Approach 1:
The system performs preliminary image calibration by capturing a calibration pattern projected onto the projection surface before actual image projection. The image processing circuit analyzes the captured calibration image to determine geometric transformation parameters (rotation, scaling, perspective correction) in advance, so that subsequent images can be pre-distorted to compensate for projection surface irregularities and device orientation, achieving automatic calibration without requiring manual adjustment or fixed installation positions.
2Manufacturing precision
If multi-dimensional transformation processes are applied, then image calibration quality is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical calibration systems with software-based image processing. Instead of using mechanical adjustment mechanisms to physically align the projection, the system uses an image processing circuit to perform multi-dimensional geometric transformations (rotation, scaling, perspective correction) on the image data. This software-based approach achieves precise calibration while avoiding mechanical complexity.
Solution Approach 2:
The system changes image parameters through multi-dimensional geometric transformations. The image processing circuit applies transformation matrices to modify image coordinates, performing operations such as rotation around the optical axis, scaling in horizontal and vertical directions, and perspective correction based on the captured calibration pattern. These parameter changes enable flexible image adaptation to different projection surfaces and device orientations.
Data Source
AI summary
A multi-dimensional image projection apparatus is provided. The multi-dimensional image projection apparatus includes an image projector and an image-processing circuit. The image-processing circuit is configured to receive an input image, and perform a linearity transformation process and a first inverse image warping process on the input image according to sensor information about the multi-dimensional image projection apparatus relative to the projection surface to generate a first image. The image-processing circuit performs a matrix transformation process and a second inverse image warping process on the first image according to the sensor information to generate a second image, and generate an output image according to the second image. The image projector projects the output image onto the projection surface.