Super-Resolved Demosaicing for Plenoptic Camera Spatial Resolution
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Solution Overview
Problem
Conventional demosaicing techniques in light-field cameras modify sensitive subpixel positional data, damaging implicit subpixel displacement information and limiting the spatial resolution of rendered images.
Innovation Solution
A super-resolved demosaicing technique that performs simultaneous super-resolution and demosaicing, applying a kernel to accumulate values from microimages based on a current depth of focus to generate a super-resolved image, thereby preserving subpixel information and improving spatial resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional demosaicing is applied to process light-field images, then color images can be generated, but subpixel positional data is modified and spatial resolution is limited
Solution Approach 1:
The patent combines demosaicing and super-resolution into a single unified processing step. Instead of performing demosaicing first and then super-resolution separately, the method integrates both operations to simultaneously reconstruct color information and preserve subpixel displacement data, thereby achieving high spatial resolution without losing subpixel information
Solution Approach 2:
The patent performs preliminary registration and alignment of microimages before the combined demosaicing-super-resolution processing. By pre-aligning the microimages based on subpixel displacement information, the method ensures that this sensitive information is preserved throughout the subsequent processing steps, preventing the loss that occurs in conventional approaches
Data Source
AI summary
A super-resolved demosaicing technique for rendering focused plenoptic camera data performs simultaneous super-resolution and demosaicing. The technique renders a high-resolution output image from a plurality of separate microimages in an input image at a specified depth of focus. For each point on an image plane of the output image, the technique determines a line of projection through the microimages in optical phase space according to the current point and angle of projection determined from the depth of focus. For each microimage, the technique applies a kernel centered at a position on the current microimage intersected by the line of projection to accumulate, from pixels at each microimage covered by the kernel at the respective position, values for each color channel weighted according to the kernel. A value for a pixel at the current point in the output image is computed from the accumulated values for the color channels.