Filter modules for aperture-coded, multiplexed imaging systems
AssigneeRicoh Company, Ltd.
InventorsKathrin Berkner, Sapna A. Shroff
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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 a computer system performing the steps of:
- accessing 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 with the candidate filter module forming multiplexed images, wherein the multiplexed images are aperture coded by the candidate filter module;
- simulating refocusing of the multiplexed images;
- calculating a performance metric that is a function of the simulated multiplexed images and the refocused multiplexed images, wherein the performance metric is indicative of the predefined task and the predefined task is also a function of the simulated multiplexed images and the refocused multiplexed images;
- and
- iteratively modifying the candidate spatial partition of filter cells to improve the calculated performance metric;
- wherein all of the above steps are performed by one or more processors within the computer system.
A non-transitory computer readable medium containing software instructions than, when executed on a hardware computer system, cause the hardware computer system to perform a 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 method comprising:
- accessing 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 with the candidate filter module forming multiplexed images, wherein the multiplexed images are aperture coded by the candidate filter module;
- simulating refocusing of the multiplexed images;
- calculating a performance metric that is a function of the simulated multiplexed images and the refocused multiplexed images, wherein the performance metric is indicative of the predefined task and the predefined task is also a function of the simulated multiplexed images and the refocused multiplexed images;
- and
- iteratively modifying the candidate spatial partition of filter cells to improve the calculated performance metric.
Dependencies are inferred from the claim text.