Image Warping Circuit for Curved Screen Distortion Correction
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Solution Overview
Problem
Display devices with curved screens, such as automotive HUDs and large panel displays, suffer from image distortion due to curvature, which impairs the user's ability to extract information accurately.
Innovation Solution
Implement an image warping circuit and drive circuitry to perform efficient image warping processing, reducing computational complexity by avoiding homography transformations and using a novel algorithm to correct image distortion on curved screens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If image warping processing is performed using conventional homography transformations, then image distortion can be corrected, but hardware and software resources are excessively consumed
Solution Approach 1:
The patent divides the image into multiple regions (first region and second region) with different curvature characteristics. Each region is processed independently using appropriate warping methods, avoiding the need to process the entire image with complex homography transformations. This segmentation reduces computational complexity while maintaining distortion correction effectiveness in each region.
Solution Approach 2:
The patent applies different image warping strategies to different regions based on their local curvature characteristics. The first region (with lower curvature) uses a simpler warping method while the second region (with higher curvature) uses a more sophisticated method. This local quality approach ensures optimal distortion correction with minimal resource consumption in each specific area.
2Manufacturing precision
If conventional image warping methods are used, then distortion correction can be achieved, but processing time and computational complexity increase
Solution Approach 1:
By segmenting the image into regions with different curvature characteristics, the patent enables parallel processing of multiple regions simultaneously. Each region can be processed with an optimized algorithm appropriate to its characteristics, reducing overall processing time compared to applying a single complex homography transformation to the entire image.
Solution Approach 2:
The patent changes the processing parameters (warping method selection) based on the curvature characteristics of different image regions. This adaptive parameter adjustment allows the system to use computationally efficient methods where sufficient while maintaining high accuracy where needed, thereby reducing total processing time while preserving distortion correction quality.
Data Source
AI summary
A display driver includes an image warping circuit and drive circuitry. The image warping circuit performs image warping processing on input image data corresponding to an input image to generate resulting image data corresponding to a resulting image. The image warping processing may include determining first and second ratios corresponding to a target pixel in a quadrangular target cell defined in the resulting image, wherein the target pixel is located at an intersection of a first line segment that divides a first pair of opposing sides of the target cell according to the first ratio and a second line segment that divides a second pair of opposing sides of the target cell according to the second ratio. Pixel data of the target pixel may be determined based on pixel data of one or more pixels selected from pixels of the input image based on the first and second ratios.