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This paper describes a 51.2-GOPS video recognition processor, which achieves real-time multiple processing of in-vehicle video recognition applications in software, while at the same time satisfying power efficiency requirements of an in-vehicle device. The chip integrates 128 RISC microprocessors, each operating at 100 MHz, into a single chip. Hardware configurations of the chip are enhanced for supporting efficient execution of extended C language codes of algorithms based on four basic parallel methods. The results of a benchmark test using a weather-robust lane mark and vehicle detection application show that the processor achieves a four times better performance while it consumes less than 1/20 of peak power consumption compared with a 2.4-GHz general-purpose processor.