Superresolution enhancment of peripheral regions in nonlinear lens geometries

摘要

A technique of enhancing a scene containing one or more off-center peripheral regions within an initial distorted image captured with a large field of view includes determining and extracting an off-center region of interest (hereinafter “ROI”) within the image. Geometric correction is applied to reconstruct the off-center ROI into a rectangular or otherwise undistorted or less distorted frame of reference as a reconstructed ROI. A quality of reconstructed pixels is determined within the reconstructed ROI. One or more additional initially distorted images is/are acquired, and matching additional ROIs are extracted and reconstructed to combine with reduced quality pixels of the first reconstructed ROI using a super-resolution technique to provide one or more enhanced ROIs.

主权项

1. Within an image acquisition system comprising a non-linear, wide-angled lens and an imaging sensor, a method of enhancing a scene containing one or more off-center peripheral regions, the method comprising:
acquiring an initial distorted image with a large field of view, including using a non-linear, wide-angled lens and an imaging sensor; determining and extracting an off-center region of interest (ROI) within said initial distorted image; applying a geometric correction to reconstruct the off-center ROI into an approximately rectangular frame of reference as a first reconstructed ROI; determining, on a pixel-by-pixel basis, a quality of reconstructed pixels within said first reconstructed ROI; wherein, within the first reconstructed ROI, a first plurality of pixels have quality measures above a threshold, and a second plurality of pixels have quality measures below the threshold; and acquiring one or more additional initially distorted images, and extracting and reconstructing matching additional ROIs to combine with the second plurality of pixels of said first reconstructed ROI using a super-resolution technique to provide one or more enhanced ROIs; wherein the method is performed using one or more computing devices.