2. 無線感測網路用於即時影像處理
• Extended to most of image processing
applications, such as face detection, object
recognition, object tracking, license plate
reading, etc.
• Replace a powerful, expensive server with a
cluster of cheaper CMOS sensors.
• The density of CMOS sensors has to be
• Pushpin network proposed by MIT media lab
• Used to explore the topologies of shapes cast on
the network using wither shadow or lights
• Each node can perform a simple real-time image
processing tasks and communicate with adjacent
nodes.
• Capable of real-time edge detection and feature
extraction.
• This suggests that the sensor network may
perform well in real time image processing
application.
應用 明：說
IDEA FIND ：
Source: Michael Broxton
, “Localization and Sensing Applications in the Pushpin Computing
Network”
4. 技術內容— Pushpin Computing Platform
• Pushpin node
– Communication layer: features infrared
transceiver, radius of roughly 10 cm.
– Processing layer: 8-bit micro-controller from
Silicon Laboratory, 22MHz, 2.25k of RAM and
32k of non-volatile flash memory.
– Sensing layer: includes a photo-reansistor or
microphone and some LEDs.
硬體
軟體架構
A Pushpin node
• Operating system: Bertha
– Provides necessary software libraries to access
hardware and OS services.
– Runs on top of a boot loader (in flash) that
allows the OS itself to be easily replaced when
newer version become available.
– Updates can be beamed to one Pushpin using
an infrared transceiver connected to a serial
port.
