Filter modules for aperture-coded, multiplexed imaging systems
AssigneeRicoh Company, Ltd.
InventorsKathrin Berkner, Sapna Shroff
Life of this patent
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Abstract
A method for designing the spatial partition of a filter module used in an aperture-multiplexed imaging system. The filter module is spatially partitioned into filter cells, and the spatial partition is designed by considering data captured at the sensor in light of an application-specific performance metric.
Claims20
A computer-implemented method for designing a filter module for use in an aperture-multiplexed imaging system, wherein the aperture-multiplexed imaging system performs a predefined task, and the aperture-multiplexed imaging system comprises a sensor that captures multiplexed images of an object, the filter module positioned approximately in a conjugate plane to the sensor to provide aperture coding of the multiplexed images, the computer-implemented method comprising:
- receiving a model of the object(s) to be imaged by the imaging system;
- receiving a candidate design for the filter module, the candidate design for the filter module including a candidate spatial partition of filter cells within the filter module;
- simulating the imaging system forming multiplexed images of the object(s), wherein each multiplexed image is aperture coded by the candidate filter module;
- calculating a performance metric as a function of the simulated multiplexed images, wherein the performance metric is indicative of the predefined task;
- and
- modifying the candidate spatial partition of filter cells in order to improve the calculated performance metric;
- wherein the method is performed by a computer system.
A non-transitory computer readable medium containing software instructions than, when executed on a computer system, cause the computer system to perform the steps of:
- receiving a model of an object(s) to be imaged by the imaging system;
- receiving a candidate design for the filter module, the candidate design for the filter module including a candidate spatial partition of filter cells within the filter module;
- simulating the imaging system forming multiplexed images of the object(s), wherein each multiplexed image is aperture coded by the candidate filter module;
- calculating a performance metric as a function of the simulated multiplexed images, wherein the performance metric is indicative of the predefined task;
- and
- based on the calculated performance metric, modifying the candidate spatial partition of filter cells in order to improve the calculated performance metric.
Dependencies are inferred from the claim text.