COMPRESSIVE SENSING BASED BIO-INSPIRED SHAPE FEATURE DETECTION CMOS IMAGER
First Claim
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1. A compressive sensing-based bio-inspired shape feature detection imager circuit comprising a plurality of circuits operatively coupled to one another, the plurality of circuits comprising:
- an active pixel sensor array configured to collect an image in an original space and generate an analog representation of the collected image;
a bio-inspired shape feature compressive sensing projection matrix circuit configured to project the analog representation of the collected image simultaneously onto each target bio-inspired feature of a set of target bio-inspired features and map the projected image from an original space to a compressive sensing space, and generate i) correlation data of the projected image in the compressive sensing space to the set of target bio-inspired features, and ii) reference position data in the original space for the collected image;
a target detection and location circuit configured to process the correlation data and the reference position data to identify a potential target in the collected image from amongst the set of target bio-inspired features;
a compressive sensing sampling data array circuit configured to process the projected image in the compressive sensing space to recover a digital representation of the collected image in the original space, and generate position and identity information of an identified potential target within the recovered collected image in the original space; and
an adaptive target extraction circuit configured to track the identified potential target in a next collected image and extract a corresponding new feature from the next collected image to add to the set of target bio-inspired features.
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Abstract
A CMOS imager integrated circuit using compressive sensing and bio-inspired detection is presented which integrates novel functions and algorithms within a novel hardware architecture enabling efficient on-chip implementation.
14 Citations
19 Claims
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1. A compressive sensing-based bio-inspired shape feature detection imager circuit comprising a plurality of circuits operatively coupled to one another, the plurality of circuits comprising:
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an active pixel sensor array configured to collect an image in an original space and generate an analog representation of the collected image; a bio-inspired shape feature compressive sensing projection matrix circuit configured to project the analog representation of the collected image simultaneously onto each target bio-inspired feature of a set of target bio-inspired features and map the projected image from an original space to a compressive sensing space, and generate i) correlation data of the projected image in the compressive sensing space to the set of target bio-inspired features, and ii) reference position data in the original space for the collected image; a target detection and location circuit configured to process the correlation data and the reference position data to identify a potential target in the collected image from amongst the set of target bio-inspired features; a compressive sensing sampling data array circuit configured to process the projected image in the compressive sensing space to recover a digital representation of the collected image in the original space, and generate position and identity information of an identified potential target within the recovered collected image in the original space; and an adaptive target extraction circuit configured to track the identified potential target in a next collected image and extract a corresponding new feature from the next collected image to add to the set of target bio-inspired features. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method used in an imager integrated circuit (IC) for detecting a potential target feature from a collected image, the method comprising:
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storing in the imager IC a plurality of compressive sensing bio-inspired representations of a plurality of target features into a projection matrix; dividing in the imager IC the collected image into a plurality of non-overlapping sub-windows of a same size; projecting in the imager IC a sub-window of the plurality of sub-windows onto the projection matrix; based on the projecting, obtaining in the imager IC a compressive sensing sub-window; generating in the imager IC correlation data of the compressive sensing sub-window to the plurality of target features; assigning in the imager IC reference position of the sub-window within the collected image to the correlation data; repeating the projecting, obtaining, generating and assigning for all sub-windows of the plurality of sub-windows; evaluating in the imager IC the correlation data for all sub-windows; based on the evaluating, determining in the imager IC a detected potential target; recovering in the imager IC the collected image based on the compressive sensing sub-windows; and based on the assigning and the determining and the recovering, identifying in the imager IC the detected potential target within the recovered collected image. - View Dependent Claims (16, 17, 18, 19)
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Specification