This paper gives a practical schema for using DSP boards to construct Vehicle License Plate Recognition (VLPR) modules that could be embedded in any Intelligent Transportation System (ITS). Using DSP can avoid the hea...This paper gives a practical schema for using DSP boards to construct Vehicle License Plate Recognition (VLPR) modules that could be embedded in any Intelligent Transportation System (ITS). Using DSP can avoid the heavy investment in dedicated VLPR system and improve the computational power compared to PC software environment. Low cost, high computational power, and high flexibility of DSP provide the License Plate Recognition System (LPRS) an excellent cost-effective solution to execute the major part of the recognition tasks. This paper describes a successful implementation of VLPR system based on Texas Instruments (TI)'s TMS320DM642. The DSP board acquires video (which could be output to a monitor for surveillance) from a camera, captures images from the video, locates and recognizes the license plates in images, and then sends the recognized results and related images after compression to a host PC through the network. Finally, the overall software is optimized according to the features of DM642 chip. Experiments showed that the DSP VLPR system performs well on the local license plates, and that the processing speed and accuracy can meet the requirement of practical applications.展开更多
目的探讨解毒祛瘀滋肾方中3味解毒中药单用或不同组合对MRL/lpr小鼠血清及肾组织调节正常T细胞表达和分泌活性因子(regulated on activation normal T cell expressed and secreated,RANTES)表达的影响。方法 54只MRL/lpr小鼠随机分成9...目的探讨解毒祛瘀滋肾方中3味解毒中药单用或不同组合对MRL/lpr小鼠血清及肾组织调节正常T细胞表达和分泌活性因子(regulated on activation normal T cell expressed and secreated,RANTES)表达的影响。方法 54只MRL/lpr小鼠随机分成9组,每组6只,分别以青蒿、蛇舌草、升麻、青蒿蛇舌草、青蒿升麻、蛇舌草升麻、青蒿蛇舌草升麻煎剂、泼尼松混悬液、生理盐水灌胃,12周后取血及肾脏,以ELISA法及RT-PCR法分别检测血清和肾组织中RANTES的表达。结果治疗12周末,泼尼松组的RANTES表达水平均显著下降;青蒿、升麻对RANTES表达水平的抑制作用不明显,蛇舌草、青蒿联合蛇舌草、青蒿联合升麻、蛇舌草联合升麻虽均有一定的抑制作用,但均不如青蒿联合蛇舌草及升麻的抑制作用明显。结论青蒿、蛇舌草、升麻三药联用能抑制RANTES的表达。展开更多
基金the National Natural Science Foundation of China (No. 60473106)the Hi-Tech Research and Development Program (863) of China (Nos. 2007AA01Z311 and 2007AA04ZA5)
文摘This paper gives a practical schema for using DSP boards to construct Vehicle License Plate Recognition (VLPR) modules that could be embedded in any Intelligent Transportation System (ITS). Using DSP can avoid the heavy investment in dedicated VLPR system and improve the computational power compared to PC software environment. Low cost, high computational power, and high flexibility of DSP provide the License Plate Recognition System (LPRS) an excellent cost-effective solution to execute the major part of the recognition tasks. This paper describes a successful implementation of VLPR system based on Texas Instruments (TI)'s TMS320DM642. The DSP board acquires video (which could be output to a monitor for surveillance) from a camera, captures images from the video, locates and recognizes the license plates in images, and then sends the recognized results and related images after compression to a host PC through the network. Finally, the overall software is optimized according to the features of DM642 chip. Experiments showed that the DSP VLPR system performs well on the local license plates, and that the processing speed and accuracy can meet the requirement of practical applications.
文摘目的探讨解毒祛瘀滋肾方中3味解毒中药单用或不同组合对MRL/lpr小鼠血清及肾组织调节正常T细胞表达和分泌活性因子(regulated on activation normal T cell expressed and secreated,RANTES)表达的影响。方法 54只MRL/lpr小鼠随机分成9组,每组6只,分别以青蒿、蛇舌草、升麻、青蒿蛇舌草、青蒿升麻、蛇舌草升麻、青蒿蛇舌草升麻煎剂、泼尼松混悬液、生理盐水灌胃,12周后取血及肾脏,以ELISA法及RT-PCR法分别检测血清和肾组织中RANTES的表达。结果治疗12周末,泼尼松组的RANTES表达水平均显著下降;青蒿、升麻对RANTES表达水平的抑制作用不明显,蛇舌草、青蒿联合蛇舌草、青蒿联合升麻、蛇舌草联合升麻虽均有一定的抑制作用,但均不如青蒿联合蛇舌草及升麻的抑制作用明显。结论青蒿、蛇舌草、升麻三药联用能抑制RANTES的表达。
