Projection Image Processing Using Pixel Block Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing projection display devices, such as DLP projectors, struggle to maintain image quality when projecting high-resolution images due to limitations in their hardware, resulting in the loss of pixel information.
Innovation Solution
The method involves adjusting the high-resolution image to an integer multiple of the projector's supported resolution, dividing it into pixel blocks, and projecting these blocks alternately to maintain the original pixel information without exceeding the projector's resolution capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of the projection display device is improved to support higher resolution images, then the image quality and information display capability will be improved, but the manufacturing complexity and cost will increase significantly
Solution Approach 1:
The high-resolution image is divided into multiple pixel blocks that are processed and projected separately. Each pixel block is mapped to the lower-resolution DMD chip, and the blocks are projected alternately to reconstruct the full high-resolution image, thereby avoiding the need for a high-resolution DMD chip while maintaining image quality
Solution Approach 2:
The solution transitions from a spatial resolution problem to a temporal dimension problem by projecting pixel blocks alternately in different time frames. This temporal multiplexing allows a single lower-resolution projector to display high-resolution images by exploiting the persistence of vision effect
2Measurement precision
If the resolution of the projection display device is improved, then the clarity and detail of projected images will be improved, but the ease of manufacture and availability of hardware will deteriorate
Solution Approach 1:
Instead of requiring a high-resolution DMD chip that is difficult to manufacture and obtain, the method creates multiple lower-resolution representations (pixel blocks) of the high-resolution image and projects them alternately. This copying approach uses readily available lower-resolution components to achieve high-resolution display效果
Solution Approach 2:
The method changes the operational parameters of the projection system by varying the projection angles and timing for different pixel blocks. By dynamically adjusting these parameters, the system achieves high-resolution output using a fixed lower-resolution hardware platform
3Device complexity
If a high-resolution image is projected directly using a lower-resolution projector, then the hardware requirements are met, but pixel information is lost resulting in degraded image quality
Solution Approach 1:
The image is segmented into pixel blocks that are projected alternately, ensuring that each block's pixel information is preserved in its dedicated projection frame. This segmentation prevents information loss by dedicating specific time slots to specific spatial regions
Solution Approach 2:
The projection follows a periodic pattern where different pixel blocks are projected in alternating frames. This periodic action ensures that all pixel information from the high-resolution image is systematically displayed over time, with each pixel block receiving dedicated display time in its appropriate temporal slot
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach ensures that high-resolution images are projected and displayed without losing any pixel information, overcoming the limitations of existing technologies by leveraging visual persistence in human eyes to integrate the alternate projections effectively.
Implementation Method 1
leveraging visual persistence in human eyes to integrate the alternate projections effectively
Data Source
AI summary
Embodiments of this disclosure disclose a method for processing a projection image, including: obtaining an image to be projected, with a first resolution; adjusting the resolution of the image to be projected, according to a second resolution supported by a projection display device, to obtain a first image with a third resolution, number of pixels in the row direction of an image with the third resolution is N times number of pixels in the row direction of an image with the second resolution, and number of pixels in the column direction of the image with the third resolution is M times number of pixels in the column direction of the image with the second resolution; dividing the first image into pixel blocks, integrating pixels in the pixel blocks, to obtain a second image and a third image; and projecting the second image and the third image alternately.