A 1000 FPS at 128×128 vision processor with 8-bit digitized I/O
|Liñán Cembrano, Gustavo
Rodríguez Vázquez, Ángel Benito
Carmona Galán, Ricardo
Jiménez Garrido, Francisco José
Espejo Meana, Servando Carlos
Domínguez Castro, Rafael
|Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo
|This paper presents a mixed-signal programmable chip for high-speed vision applications. It consists of an array of processing elements, arranged to operate in accordance with the principles of single instruction multiple ...
This paper presents a mixed-signal programmable chip for high-speed vision applications. It consists of an array of processing elements, arranged to operate in accordance with the principles of single instruction multiple data (SIMD) computing architectures. This chip, implemented in a 0.35-μm fully digital CMOS technology, contains ∼ 3.75 M transistors and exhibits peak performance figures of 330 GOPS (8-bit equivalent giga-operations per second), 3.6 GOPS/mm2 and 82.5 GOPS/W. It includes structures for image acquisition and for image processing, meaning that it does not require a separate imager for operation. At the sensory side, integration and log-compression sensing circuits are embedded, thus allowing the chip to handle a large variety of illumination conditions. At the processing plane, analog and digital circuits are employed whose parameters can be programmed and their architecture reconfigured for the realization of software-coded processing algorithms. The chip provides, and accepts, 8-bit digitized data through a 32-bit bidirectional data bus which operates at 120 MB/s. Experimental results show that frame rates of 1000 frames per second (FPS) can be achieved under room illumination conditions; applications using exposures of about 50 μs have been recently reached by using special illumination setups. The chip can capture an image, run approximately 150 two-dimensional linear convolutions, and download the result in 8-bit digital format, in less than 1 ms. This feature, together with the possibility of executing sequences of user-definable instructions (stored on a full-custom 32-kb on-chip memory), and storing intermediate results (up to 8 grayscale images) makes the chip a true general-purpose sensory/processing device.
|European Commission (EC)
Office of Naval Research (ONR). United States
|Liñán Cembrano, G., Rodríguez Vázquez, Á.B., Carmona Galán, R., Jiménez Garrido, F.J., Espejo Meana, S.C. y Domínguez Castro, R. (2004). A 1000 FPS at 128×128 vision processor with 8-bit digitized I/O. IEEE Journal of Solid-State Circuits, 39 (7), 1044-1055.