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這是車牌識別算法以及代碼實現，希望可以幫到大家。車牌識別技術要求能夠將運動中的汽車牌照從復雜背景中提取并識別出來，通過車牌提取、圖像預處理、特征提取、車牌字符識別等技術，識別車輛牌號、顏色等信息，目前最新的技術水平為字母和數字的識別率可達到99.7%，漢字的識別率可達到99%。
車牌識別技術結合電子不停車收費系統（ETC）識別車輛，過往車輛通過道口時無須停車，即能夠實現車輛身份自動識別、自動收費。在車場管理中，為提高出入口車輛通行效率，車牌識別針對無需收停車費的車輛（如月卡車、內部免費通行車輛），建設無人值守的快速通道，免取卡、不停車的出入體驗，正改變出入停車場的管理模式。
代碼片段和文件信息
/********************?（C）?COPYRIGHT?2009?www.armjishu.com?************************
*?File?Name??????????:?ARMJISHU_TouchScreen_ADS7843.c
*?Author?????????????:?www.armjishu.com?Team
*?Version????????????:?V3.0.1
*?Date???????????????:?03/20/2010
*?Description????????:?
????????????????????????ADS7843_CS???is?PB1
????????????????????????ADS7843_INT??is?PC1
*******************************************************************************/
#include?“ARMJISHU_TouchScreen_ADS7843.h“
#include?“stm32f10x.h“
#include?
#include?“stm32f10x_exti.h“
#include?“ili9320.h“
#include?“stm32f10x_tim.h“
//?A/D?通道選擇命令字和工作寄存器
#define CHX? 0x90//0x90? //通道Y+的選擇控制字 //0x94
#define CHY? 0xD0//0xd0 //通道X+的選擇控制字 //0xD4
//#define?ADS7843_WrCmd??SPI1_SendByte
//#define?ADS7843_Read???SPI1_RecvByte
void?ADS7843_CS_config（void）
{
??GPIO_InitTypeDef?GPIO_InitStructure;
??/*?Enable?GPIOB?GPIOC?and?AFIO?clock?*/
??RCC_APB2PeriphClockCmd（RCC_ADS7843_CS??ENABLE）;??//RCC_APB2Periph_AFIO
??
??/*?LEDs?pins?configuration?*/
??GPIO_InitStructure.GPIO_Pin?=?GPIO_ADS7843_CS;
??GPIO_InitStructure.GPIO_Speed?=?GPIO_Speed_50MHz;
??GPIO_InitStructure.GPIO_Mode?=?GPIO_Mode_Out_PP;
??GPIO_Init（GPIO_ADS7843_CS_PORT?&GPIO_InitStructure）;
}
static?void?ADS7843_INT_config（void）
{
??GPIO_InitTypeDef?GPIO_InitStructure;
??/*?Enable?GPIOB?GPIOC?and?AFIO?clock?*/
??RCC_APB2PeriphClockCmd（RCC_ADS7843_INT??ENABLE）;??//RCC_APB2Periph_AFIO
??
??/*?LEDs?pins?configuration?*/
??GPIO_InitStructure.GPIO_Pin?=?GPIO_ADS7843_INT;
??//GPIO_InitStructure.GPIO_Speed?=?GPIO_Speed_50MHz;
??GPIO_InitStructure.GPIO_Mode?=?GPIO_Mode_IPU;
??GPIO_Init（GPIO_ADS7843_INT_PORT?&GPIO_InitStructure）;
}
static?void?ADS7843_INT_EXIT_Init（void）
{
????EXTI_InitTypeDef?EXTI_InitStructure;
????/*?Connect?Button?EXTI?Line?to?Button?GPIO?Pin?*/
????GPIO_EXTILineConfig（GPIO_ADS7843_EXTI_PORT_SOURCE?GPIO_ADS7843_EXTI_PIN_SOURCE）;??
????/*?Configure?Button?EXTI?line?*/
????EXTI_InitStructure.EXTI_Line?=?GPIO_ADS7843_EXTI_LINE;
????EXTI_InitStructure.EXTI_Mode?=?EXTI_Mode_Interrupt;
????EXTI_InitStructure.EXTI_Trigger?=?EXTI_Trigger_Falling;??
????EXTI_InitStructure.EXTI_LineCmd?=?ENABLE;
????EXTI_Init（&EXTI_InitStructure）;
}
/*******************************************************************************
*?Function?Name??:?InterruptConfig
*?Description????:?Configures?the?used?IRQ?Channels?and?sets?their?priority.NVIC_Configuration
*?Input??????????:?None
*?Output?????????:?None
*?Return?????????:?None
*******************************************************************************/
static?void?ADS7843_InterruptConfig（void）
{?
??NVIC_InitTypeDef?NVIC_InitStructure;
??
??/*?Set?the?Vector?Table?base?address?at?0x08000000?*/
??NVIC_SetVectorTable（NVIC_VectTab_FLASH?0x0000）;
??
??/*?Configure?the?Priority?Group?to?2?bits?*/
??NVIC_PriorityGroupConfig（NVIC_PriorityGroup_2）;
??/*?Enable?the?EXTI5?Interrupt?*/
??NVIC_InitStructure.NVIC_ ?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件??????10115??2012-10-15?19:50??車牌識別\ARMJISHU_TouchScreen_ADS7843.c
?????文件??????10567??2010-10-27?20:56??車牌識別\ARMJISHU_TouchScreen_ADS7843.c.bak
?????文件???????3284??2010-11-01?22:08??車牌識別\ARMJISHU_TouchScreen_ADS7843.h
?????文件???????3284??2010-10-27?21:01??車牌識別\ARMJISHU_TouchScreen_ADS7843.h.bak
?????文件????????230??2011-04-13?22:47??車牌識別\delay.c
?????文件????????195??2011-04-13?23:10??車牌識別\delay.h
?????文件??????96801??2010-04-23?10:42??車牌識別\EWARMv5\Backup?of?Project.ewd
?????文件?????116674??2010-04-23?10:42??車牌識別\EWARMv5\Backup?of?Project.ewp
?????文件??????18030??2010-10-04?22:05??車牌識別\EWARMv5\Project.dep
?????文件??????88736??2010-10-04?20:58??車牌識別\EWARMv5\Project.ewd
?????文件?????116463??2010-10-04?20:57??車牌識別\EWARMv5\Project.ewp
?????文件????????161??2010-04-23?10:42??車牌識別\EWARMv5\Project.eww
?????文件???????5583??2010-04-23?10:42??車牌識別\EWARMv5\readme.txt
?????文件???????2503??2010-10-04?20:58??車牌識別\EWARMv5\settings\Project.cspy.bat
?????文件???????5142??2010-10-04?22:05??車牌識別\EWARMv5\settings\Project.dbgdt
?????文件????????705??2010-10-04?22:05??車牌識別\EWARMv5\settings\Project.dni
?????文件???????3043??2010-10-04?22:05??車牌識別\EWARMv5\settings\Project.wsdt
?????文件????????205??2010-10-04?20:58??車牌識別\EWARMv5\settings\Project_STM32100B-EVAL.jli
?????文件?????180060??2010-10-04?20:58??車牌識別\EWARMv5\STM32100B-EVAL\Exe\Project.out
?????文件??????21592??2010-10-04?20:57??車牌識別\EWARMv5\STM32100B-EVAL\Obj\core_cm3.o
?????文件??????10408??2010-10-04?20:58??車牌識別\EWARMv5\STM32100B-EVAL\Obj\main.o
?????文件??????13808??2010-10-04?20:57??車牌識別\EWARMv5\STM32100B-EVAL\Obj\misc.o
?????文件???????2209??2010-10-04?20:58??車牌識別\EWARMv5\STM32100B-EVAL\Obj\Project.pbd
?????文件??????34400??2010-10-04?20:57??車牌識別\EWARMv5\STM32100B-EVAL\Obj\startup_stm32f10x_md_vl.o
?????文件?????219892??2010-10-04?20:57??車牌識別\EWARMv5\STM32100B-EVAL\Obj\stm32100b_eval_lcd.o
?????文件??????18544??2010-10-04?20:57??車牌識別\EWARMv5\STM32100B-EVAL\Obj\stm32f10x_exti.o
?????文件??????46548??2010-10-04?20:57??車牌識別\EWARMv5\STM32100B-EVAL\Obj\stm32f10x_fsmc.o
?????文件??????40268??2010-10-04?20:57??車牌識別\EWARMv5\STM32100B-EVAL\Obj\stm32f10x_gpio.o
?????文件??????17720??2010-10-04?20:57??車牌識別\EWARMv5\STM32100B-EVAL\Obj\stm32f10x_it.o
?????文件??????62564??2010-10-04?20:57??車牌識別\EWARMv5\STM32100B-EVAL\Obj\stm32f10x_rcc.o
............此處省略265個文件信息
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