Review Article
A Survey of Visual Sensor Networks
Table 4
Comparison of different visual sensor node architectures.
| | Camera node architecture | Processing unit | Memory | Image sensor | RF transceiver |
| | MeshEye [5] | Atmel ARM7TDMI Thumb (32-bit RISC), 55 MHz | 64 KB SRAM and 256 KB Flash; external MMC/SD Flash | Two kilopixel imagers Agilent Technologies ADNS 3060 pixels (grayscale) and one ADCM 2700 VGA (color) | Chipcon CC2420 IEEE 802.15.4 | | Cyclops [58] | Atmel ATmega128L and CPLD—Xilinx XC2C256 CoolRunner | 512 KB Flash 64 KB SRAM | ADCM-1700 Agilent Technology | IEEE 802.15.4 compliant (MICA2 Mote [65]) | | SIMD (Single-instruction-multiple-data)-based architecture [66] | Philips IC3D Xetal (for low-level image processing), 8051 MCU (local host for high level image processing and control) | 1792B RAM and 64 KB Flash internal on 8051 MCU; dual port RAM 128 KB (shared memory by both processors) | VGA Image Sensor (one or two) | Aquis Grain Zigbee module based on Chipcon CC2420 | | CMUCam3 [67] | ARM7TDMI (32-bit) 60 MHz | 64 KB RAM and 128 KB Flash on MCU, 1 MB AL4V8M440 FIFO Frame Buffer Flash (MMC) | Omnivision OV6620, pixels | IEEE 802.15.4 compliant (Telos mote) |
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