Abstract:
Multiframe reconstruction combines a set of acquired images into a reconstructed image. Here, which images to acquire are selected based at least in part on the content of previously acquired images. In one approach, a set of at least three images of an object are acquired at different acquisition settings. For at least one of the images in the set, the acquisition setting for the image is determined based at least in part on the content of previously acquired images. Multiframe image reconstruction is applied to the set of acquired images to synthesize a reconstructed image of the object.
Abstract:
A spatially-varying sharpening filter and a color registration module compensate for significant lateral color in poorly corrected optics. In one aspect, a color imaging system includes image-forming optics, a sensor array and a processing module. The processing module includes a color registration module and a spatially-varying sharpening filter. The image-forming optics suffers from lateral chromatic aberration. The sensor array captures color pixels of the chromatically aberrated optical image. The spatially-varying sharpening filter sharpens the image (e.g., reduces the blurring caused by lateral color), and the color registration module realigns different color channels of the image.
Abstract:
An adjustable multimode lightfield imaging system. A non-homogeneous filter module is positioned at the aperture plane of the lightfield imaging system and provides the multimode capability. The filter module can be moved relative to the imaging system, thus allowing adjustment of the multimode capability.
Abstract:
An adjustable multimode lightfield imaging system. A non-homogeneous filter module is positioned at the aperture plane of the lightfield imaging system and provides the multimode capability. The filter module can be moved relative to the imaging system, thus allowing adjustment of the multimode capability.
Abstract:
A weighted sum of a set of component filters is used to effectively apply different “composite” FIR filters to compensate for aberrations resulting from different opto-mechanical settings. The FIR filters are “composite” in the sense that they are a weighted sum of the set of component filters. In one approach, the aberrations vary as a function of the opto-mechanical setting, and the opto-mechanical setting is used to determine the weights of the different component filters.
Abstract:
Adaptive optics (AO) elements in imaging system allow dynamic and precise control over the optical wavefront to reduce uncontrolled wavefront errors in imaging systems. Traditional control of such devices is based on inverting the wavefront function to minimize the RMS wavefront error. However, this approach is not always optimal, particularly when the wavefront error is near or exceeds the limit of the AO element's correction capability. In the current approach, the AO element is instead controlled based on a performance metric that takes into account image processing, and not just RMS wavefront error.
Abstract:
A spatially-varying sharpening filter and a color registration module compensate for significant lateral color in poorly corrected optics. In one aspect, a color imaging system includes image-forming optics, a sensor array and a processing module. The processing module includes a color registration module and a spatially-varying sharpening filter. The image-forming optics suffers from lateral chromatic aberration. The sensor array captures color pixels of the chromatically aberrated optical image. The spatially-varying sharpening filter sharpens the image (e.g., reduces the blurring caused by lateral color), and the color registration module realigns different color channels of the image.
Abstract:
Multiframe reconstruction combines a set of acquired images into a reconstructed image. Here, which images to acquire are selected based at least in part on the content of previously acquired images. In one approach, a set of at least three images of an object are acquired at different acquisition settings. For at least one of the images in the set, the acquisition setting for the image is determined based at least in part on the content of previously acquired images. Multiframe image reconstruction is applied to the set of acquired images to synthesize a reconstructed image of the object.
Abstract:
An electro-optic color imaging system includes an optical subsystem, a detector subsystem and a digital image processing subsystem. The system is used to image a color-correlated object. In the optical subsystem, the image surfaces for different color channels of the object are substantially separated. Thus, one color channel may be in focus while others are out of focus. The detector subsystem is located at a fixed image distance from the optical subsystem and captures the different color channel images of the object. The image processing subsystem estimates the image of the object by combining the captured color channel images based at least in part on an a priori estimate of the correlation between the color channels.
Abstract:
A catadioptric imaging system combines a rectifying mirror, a lens system and subsequent image processing. This approach can produce a small form factor desktop document imaging system capable of producing high-quality, high-resolution images of paper documents.