Patent ID: 8665334
Filing Date: 2014-03-04
Classification: H04N

Abstract:
1. A system for blur-calibration of an imaging sensor, the system comprising: a target having a known target pattern comprising a plurality of point-like objects with fixed relative positions; a projection element to project at least a portion of the target pattern within a field-of-view (FOV) of the imaging sensor; a controller configured to move the target pattern across the FOV; image-capture elements to capture frames of images of the moving target pattern as seen in the FOV of the imaging sensor and generate an image data output, wherein the controller is configured to cause the target pattern to move across the FOV to present the target pattern across different frames at different pixel phases, wherein the image data output from the image-capture elements is subsequently processed to generate data products representative of a shape of a point-spread function (PSF) from a high-resolution composite image generated from the captured frames; and a data processing element configured to process the image data output generated from the image-capture elements, wherein the data processing element is configured to: determine an overall shift of the target pattern across the FOV in each frame of video of the image data output; associate point-like objects observed in each frame of video of the image data output with corresponding point-like objects of the known target pattern based on the known target pattern; generate one or more sub-pixel resolution composite images for one or more of the point-like objects by combing different images of same point-like objects taken at the different positions, each sub-pixel resolution composite image being effectively placed within the high-resolution composite image according to a relative position, including full-pixel shift and sub-pixel phase, of the point-like object in that image; and produce data products representative of a shape of the PSF from the composite image.