techbrief
====== Differences ====== This shows you the differences between two versions of the page.
|
techbrief [2007/10/08 16:44] tobi created |
techbrief [2007/10/09 09:05] (current) |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| ====== Dynamic Vision Sensor (DVS) ====== | ====== Dynamic Vision Sensor (DVS) ====== | ||
| + | |||
| ====Technology Overview==== | ====Technology Overview==== | ||
| - | Conventional vision sensors see the world as a series of frames. Successive frames contain enormous amounts of redundant information, wasting RAM, disk space, energy, computational power and time. In addition, each frame imposes the same exposure time on every pixel, making it impossible to deal with scenes containing very dark and very bright regions. | + | Conventional vision sensors see the world as a series of frames. Successive frames contain enormous amounts of redundant information, wasting memory access, RAM, disk space, energy, computational power and time. In addition, each frame imposes the same exposure time on every pixel, making it difficult to deal with scenes containing very dark and very bright regions. |
| - | The Dynamic Vision Sensor (DVS) solves these problems by using patented technology that works like your own retina. Instead of wastefully sending entire images at fixed frame rates, only the local pixel-level changes caused by moving in a scene are transmitted – //at exactly the time they occur//. The result is a stream of events at microsecond time resolution, equivalent to or better than conventional high-speed vision sensors running at thousands of frames per second. Power, data storage and computational requirements are also drastically reduced, and dynamic sensor range is increased by orders of magnitude due to the local processing. | + | The Dynamic Vision Sensor (DVS) solves these problems by using patented technology that works like your own retina. Instead of wastefully sending entire images at fixed frame rates, only the local pixel-level changes caused by movement in a scene are transmitted – //at exactly the time they occur//. The result is a stream of events at microsecond time resolution, equivalent to or better than conventional high-speed vision sensors running at thousands of frames per second. Power, data storage and computational requirements are also drastically reduced, and dynamic sensor range is increased by orders of magnitude due to the local processing. |
| ====Application Areas==== | ====Application Areas==== | ||
| Line 50: | Line 51: | ||
| **Solution:** The DVS vision sensor does all of the front-end processing, giving you only the “interesting” events in a scene. You can integrate all of your processing hardware on-board. | **Solution:** The DVS vision sensor does all of the front-end processing, giving you only the “interesting” events in a scene. You can integrate all of your processing hardware on-board. | ||
| - | ====Specifications==== | ||
| - | | **Resolution** | 128 x 128 pixels (higher resolutions coming soon) | | + | |
| - | | **Fabrication** | Standard CMOS | | + | |
| - | | **Dynamic range** | 120 dB | | + | ===== Specifications ===== |
| - | | **Power consumption** | 5 VDC, <0.5 W total (USB bus power) | | + | |
| - | | **Latency** | 15 ms | | + | | Functionality|Asynchronous temporal contrast | |
| - | | **Time resolution** | Down to 1 ms per event | | + | | Pixel size um (lambda|40x40 (200x200) | |
| - | | **Interface** | USB 2.0, Windows XP driverJava API & Matlab output file format | | + | | Fill factor (%)|8.1% (PD area 151μm2) | |
| - | | **Optics** | Standard C-mount lensesOther custom mounts available | | + | | Fabrication process|4M 2P 0.35um standard CMOS | |
| + | | Pixel complexity|26 transistors (14 analog), 3 capacitors | | ||
| + | | Array size|128x128 (higher resolutions coming soon) | | ||
| + | | Die size mm2|6.0 x 6.3 | | ||
| + | | Chip interface|15-bit word-parallel AER\\ active low req and ack | | ||
| + | | Computer interface|USB 2.0, Windows XP driver\\ [[http://jaer.wiki.sourceforge.net|Java API]] & Matlab output file format | | ||
| + | | Power consumption|Chip: 24mW @ 3.3V\\ 1.5mA core\\ 0.3mA logic\\ 5.5mA biases\\ USB System: approx. 70mA | | ||
| + | | Dynamic range|120dB\\ 2 lux to > 100 klux scene illumination with f/1.2 lens | | ||
| + | | Photodiode dark current at room temperature|4fA (~10nA/cm2)\\ Nwell photodiode | | ||
| + | | Response latency|15μs @ 1 klux chip illumination | | ||
| + | | Max events/sec|~1M events/sec | | ||
| + | | FPN, matching|2.1% contrast | | ||
| + | | Optics | Standard C-mount lenses\\ Other custom mounts available | | ||
| + | |||
| + | |||
| ====Contact==== | ====Contact==== | ||
| Institute of Neuroinformatics\\ Winterthurerstr. 190\\ 8057 Zürich\\ Switzerland\\ Tel. +41-1-635 3051\\ Fax +41-1-635 3053\\ <info@ini.phys.ethz.ch>\\ [[http://www.ini.uzh.ch]] | Institute of Neuroinformatics\\ Winterthurerstr. 190\\ 8057 Zürich\\ Switzerland\\ Tel. +41-1-635 3051\\ Fax +41-1-635 3053\\ <info@ini.phys.ethz.ch>\\ [[http://www.ini.uzh.ch]] | ||
Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/httpd/vhosts/siliconretina.ini.uzh.ch/httpdocs/wiki/inc/auth.php on line 656
techbrief.1191854646.txt.gz · Last modified: 2007/10/08 15:44 (external edit)
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 3.0 Unported
