DVS Flyer 128 Dcdb5b
User Manual: DVS-128
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DVS128 Dynamic Vision Sensor with USB 2.0 or AER interface Freeing Vision from Frames Conventional vision sensors see the world as a series of frames. Successive frames contain enormously redundant information, wasting energy, computational power and time. In addition, each frame imposes the same exposure time on every pixel, making it impossible to process scenes containing very dark and very bright regions. The DVS (Dynamic Vision Sensor) 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. Temporal resolution advantage of DVS eventbased vision sensors DVS Advantages Conventional high-speed vision systems Requires powerful PC DVS128 Works with any laptop DVS Benefits Lower costs Lower power consumption Extremely large (many TB), Minimal data size highly redundant data sets No redundant data Lower costs More portable Easier data management Custom interface cards USB 2.0 or Address Event Representation (AER); Java API More portable Easier programming Batch-mode acquisition Off-line post-processing Real-time acquisition Extremely low latency Continuous processing No downtime, lower costs Low sensitivity; need special lighting (lasers, strobes, etc.) High sensitivity; no special lighting needed Lower costs Simpler data acquisition Limited dynamic range, typically 50 dB Very high dynamic range Useable in challenging real(120 dB) world situations DVS in use: events from a spinning dot stimulus, displayed in space-time. The DVS records movements smoothly and continuously, not in a stroboscopic fashion like classical frame-based cameras. Application Areas • • • • Machine vision Robotics: real-time, mobile, fixed Microscopy High-speed tracking info@inilabs.com www.inilabs.com Case Studies Case Study 1: Vision in Challenging Environments Problem: You need to recognize objects in an environment with very bright lights and dark shadows. Conventional video cameras either over-expose or under-expose part of the scene, losing important objects in the process. Solution: The DVS automatically adapts to differing lighting conditions in different parts of an image without any calibration. Its high dynamic range reveals details that cannot be detected with conventional vision systems. Case Study 2: Fluid Particle Image Velocimetry Problem: You are analyzing turbulent fluid flow. Your conventional high-speed vision setup requires a cumbersome and expensive high-speed PC, lots of hard disk space, custom interface cards and high-intensity laser strobe lighting to illuminate the fluid. After each test run you have to wait minutes or hours while the data is processed. Solution: The DVS enables you to replace your entire system with a single standard PC with a USB connection. Normal collimated light is sufficient to illuminate the fluid. The lowbandwidth data flow can be processed in real time, enabling you to work continuously and adjust experimental parameters on the fly. Case Study 3: Real-Time Robotics Problem: You are developing a robot that needs to rely on visual input and react fast to changes in the world. You are operating under tight constraints of power consumption, space and weight. Conventional vision processing systems consume far too much power to fit on the robot platform. The standard method is to send the images for off-line processing, requiring a separate server, increasing response times and limiting the range of the robot. Solution: The DVS 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 Fabrication Standard CMOS Dynamic range Power consumption Latency Time resolution Interface Optics Synchronization 120 dB 5 VDC, <0.5 W total (USB bus powered) 15 µs Down to 1 µs per event DVS128: USB 2.0, Windows XP driver DVS128-AER: Address Event Representation output Java API (Sourceforge) & Matlab output file format Standard C-mount or CS-mount lenses Other custom mounts available Several DVS128 can be synchronized for multi-camera systems. Timestamp synchronization to external clock is also possible About Us iniLabs Ltd is a spin-off company of the Institute of Neuroinformatics of the University of Zurich and the ETH Zurich. We design, produce and sell neurotechnological systems. © 2013 iniLabs Ltd. All rights reserved. All specifications subject to change without notice. 1/9/2013 ke info@inilabs.com www.inilabs.com
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