Cylindrical Projection Rendering for Composite Image Alignment
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Solution Overview
Problem
Existing image capture systems face limitations in increasing the field of view without compromising image quality, necessitating the formation of composite images from overlapping segments, which requires accurate alignment and processing to minimize distortion and aliasing effects.
Innovation Solution
A method involving the decomposition of rotational projections into separate axis rotations, allowing for efficient rendering of composite images by rotating and interpolating pixel values along orthogonal axes, while down-sampling to reduce aliasing, and projecting images onto a cylindrical surface for alignment and blending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple overlapping images are captured to increase field of view, then the coverage area is improved, but the complexity of alignment and composite image formation increases
Solution Approach 1:
The patent divides the composite image formation process into separate axis rotations (first axis for horizontal alignment, second axis for vertical alignment). This segmentation allows independent processing of alignment operations, reducing the overall complexity of merging multiple overlapping images while maintaining accurate field of view coverage.
Solution Approach 2:
The patent introduces a cylindrical projection surface as an intermediate dimension between the captured images and the final composite image. By projecting images onto this curved surface and then unwrapping to a plane, the system handles overlapping regions more efficiently, simplifying the alignment process across multiple images.
2Speed
If images are projected directly onto a plane, then the processing speed is improved, but the distortion in the composite image increases
Solution Approach 1:
The patent uses a cylindrical projection surface (curved geometry) as an intermediate step before creating the final planar composite image. This curved surface better accommodates the overlapping geometry of multiple images taken at different angles, reducing distortion when the images are eventually unwrapped and merged into the final composite view.
3Manufacturing precision
If high-resolution images are captured to maintain image quality, then the image quality is improved, but the computational resources required for processing increases
Solution Approach 1:
The patent segments the image processing into independent row and column operations along separate axes. This allows the system to process high-resolution images in a more efficient, modular manner, reducing computational energy consumption while maintaining image quality through systematic alignment and projection operations.
4Manufacturing precision
If overlapping regions are blended to provide smooth transitions, then the visual quality is improved, but the processing time increases
Solution Approach 1:
The patent performs preliminary alignment and projection of images onto the cylindrical surface before the final blending operation. By pre-positioning images correctly in the projection space, the subsequent blending of overlapping regions requires less computational effort and time, while still achieving smooth visual transitions in the final composite image.
Data Source
AI summary
Systems, methods, and apparatus, including computer program products, are provided for forming composite images. In some implementations, a method is provided. The method includes receiving a set of component images for forming a composite image, defining a projection for the set of images transforming each component image into a projected component image, and rendering the projected component images to form the composite image. The rendering of each component image includes decomposing a rotation of the projection into separate rotations for each axis, rotating the component image along a first axis, separately identifying pixel values for each row and each column of the projected component image, and rotating the image along a third axis to form a rendered component image.