Projection Grid-Point Guidance for Accurate Image Alignment
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Solution Overview
Problem
Conventional projection systems require external computing devices for adjusting projection image alignment, which is cumbersome when projectors or image capturing devices are positioned high, and accuracy is reduced by low pixel resolution or insufficient recognizable conditions.
Innovation Solution
A projection system that adjusts projection image alignment using internal processing to change the color of unrecognizable grid points, providing visual instructions for adjusting the projector or image capturing device without external devices, and displaying unrecognizable grid points to guide environmental adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an external computing device is used to determine adjustment instructions, then the projection image alignment can be adjusted, but the device complexity increases and the ease of operation deteriorates when devices are positioned high
Solution Approach 1:
The patent merges the external computing device with the projector itself by integrating the processing unit and image generating unit into the projector. This eliminates the need for separate external devices while maintaining alignment determination capabilities, thus reducing device complexity without sacrificing measurement precision.
Solution Approach 2:
The projector performs self-diagnosis and self-adjustment by using its own processing unit to analyze captured images and generate adjustment instructions. The projector serves itself by eliminating dependency on external computing devices, thereby reducing system complexity while maintaining alignment accuracy.
2Measurement precision
If wired connection to external computing device is required, then alignment adjustment is possible, but the ease of operation deteriorates when projector or image capturing device is disposed at high position
Solution Approach 1:
The projector independently determines alignment status and generates adjustment instructions without requiring connection to external computing devices. This self-service capability eliminates the need for wired connections, significantly improving ease of operation when devices are positioned at high or hard-to-reach locations.
Solution Approach 2:
The patent extracts the alignment determination function from external computing devices and relocates it to the projector itself. This extraction eliminates the need for physical connections to external devices, thereby improving ease of operation while maintaining alignment accuracy through the integrated processing unit.
3Device complexity
If pixel resolution of grid points is too low, then the setup is simpler, but the measurement precision deteriorates
Solution Approach 1:
The patent dynamically adjusts the pixel resolution parameter of grid points based on recognition needs. The processing unit can increase resolution when alignment accuracy requires it, and decrease it when simpler setup is sufficient. This parameter flexibility allows the system to adapt between complexity and precision requirements.
Solution Approach 2:
The image resolution of grid points is made dynamic rather than fixed. The system can adjust resolution levels based on the specific alignment task requirements, capturing conditions, and processing capabilities, thereby optimizing the balance between measurement precision and device complexity.
4Adaptability or versatility
If recognizable conditions for captured image are insufficient, then the setup requirements are reduced, but the measurement precision deteriorates
Solution Approach 1:
The processing unit adjusts recognition parameters such as grid point size, contrast thresholds, and pattern characteristics to match environmental conditions. When recognizable conditions are insufficient, the system modifies these parameters to improve recognition while maintaining alignment accuracy, thus balancing adaptability with measurement precision.
Data Source
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AI summary
A projection position guiding method adapted to a projection system is provided. The projection system includes a projection target, an image capturing device and a projector. The projection position guiding method includes: projecting a projection content onto the projection target by the projector to generate a projection image, the projection content includes multiple positioning grid points arranged at intervals; capturing the projection target by the image capturing device to generate a captured image, and the captured image includes at least part of the projection image; and determining whether the positioning grid points satisfy multiple recognizable conditions according to the projection image in the captured image, when it is determined that the positioning grid points include at least one unrecognizable grid point that does not satisfy at least one of the recognizable conditions, adjusting a color of the at least one unrecognizable grid point in the projection content.