发明名称 |
METHOD AND APPARATUS FOR ON-CHIP PER-PIXEL PSEUDO-RANDOM TIME CODED EXPOSURE |
摘要 |
Conventional methods for imaging transient targets are constrained by a trade-off between resolution and frame rate, and transient targets moving faster than the detector frame typically result in image blurring. Imagers using digital-pixel focal plane arrays (“DFPAs”) have on-chip global pixel operation capability for extracting a single transient-feature (i.e., single-frequency discrimination) in a snapshot that depends on the number of counters implemented per pixel. However, these DFPA systems are not capable of multi-target and multi-frequency discrimination. Imagers described herein achieve multi-target transient signature discrimination orders of magnitude faster than the readout frame rate using in-pixel electronic shuttering with a known time-encoded modulation. Three-dimensional (x,y,t) data cube reconstruction is performed using compressive sensing algorithms. |
申请公布号 |
US2017041571(A1) |
申请公布日期 |
2017.02.09 |
申请号 |
US201514789601 |
申请日期 |
2015.07.01 |
申请人 |
TYRRELL Brian M.;CULL Christy Fernandez;BOLSTAD Andrew K. |
发明人 |
TYRRELL Brian M.;CULL Christy Fernandez;BOLSTAD Andrew K. |
分类号 |
H04N7/18;H04N5/374;H04N5/376;H04N5/359;H04N5/3745;H04N5/378 |
主分类号 |
H04N7/18 |
代理机构 |
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代理人 |
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主权项 |
1. A focal plane imaging apparatus comprising:
a plurality of photodetectors, the plurality of photodetectors comprising a first photodetector to convert a first portion of light that is scattered and/or reflected from a scene into a first analog signal and a second photodetector to convert a second portion of light that is scattered and/or reflected from the scene into a second analog signal; a plurality of analog to digital converters (ADCs), the plurality of ADCs comprising a first ADC electrically coupled to the first photodetector and configured to convert the first analog signal into a first digital signal and a second ADC electrically coupled to the second photodetector and configured to convert the second analog signal into a second digital signal; a plurality of digital registers, the plurality of digital registers comprising a first digital register electrically coupled to the first ADC and configured to store a first digital number representing the first digital signal and a second digital register electrically coupled to the second ADC and configured to store a second digital number representing the second digital signal; and a distributed control pattern generator operably coupled to the plurality of ADCs and/or the plurality of digital registers and configured to modulate, at a rate faster than a readout rate of the plurality of digital registers, storage of the first digital number with a first pseudo-random modulation and to modulate storage of the second digital number with a second pseudo-random modulation so as to control spatial correlation of the first digital number with the second digital number. |
地址 |
Brookline NH US |