A 30µW 100dB contrast vision sensor with sync-async readout and data compression
A 30µW 100dB contrast vision sensor with sync-async readout and data compression
复制标题
具有同步异步读出和数据压缩功能的 30μW 100dB 对比视觉传感器
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
M. Gottardi
中科院分区：
文献类型：
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作者：
N. Massari;M. Nicola;M. Gottardi
一种超低功耗CMOS视觉传感器，嵌入时空对比度估计和二值化，已被证明通过新的自动曝光像素架构，与以前的实现相比，提高了对比度灵敏度。处理涉及三个相邻的像素，并使用无源电荷转移机制，没有直流功耗。在动态范围超过100 dB的图像上，以3%的灵敏度计算对比度。异步数据读出时间小于100μs，可实现高达8000 fps的高数据速率操作。高效的成像器光栅扫描可跳过所有空行，将传感器读出时间缩短至10 ps，从而动态适应待发送的数据量。通过地址驱动技术实现数据压缩和传输。方形像素间距为26μm，填充因子为25%。该传感器在30fps和3.3 V时功耗为30μW，典型输出数据压缩率为70%。
An ultra-low power CMOS vision sensor, embedding spatio-temporal contrast estimation and binarisation, has been demonstrated through novel auto-exposure pixel architecture with improved contrast sensitivity compared with previous implementation. The processing involves three neighboring pixels and uses passive charge-transfer mechanism, with no dc power consumption. Contrast is computed with 3% sensitivity on images with more than 100dB dynamic-range. Asynchronous data readout takes less than 100μs, enabling high data-rate operation, up to 8000 fps. Efficient imager raster-scan skips all the empty rows, shrinking the sensor readout time down to 10ps, which dynamically adapts to the amount of data to be dispatched. Data compression and delivering is implemented through address-driven technique. The square pixel pitch is 26μm with 25% fill factor. The sensors consumes 30μW at 30fps and 3.3 V, with a typical 70% output data compression.