常用距离计算单片机C语言程序

欧氏距离，即空间中两点的直线距离，设空间中X的坐标为
Y的坐标为
X与Y之间的欧式距离为

uint16_t EuclideanDistance(uint16_t *u16DataA, uint16_t *u16DataB, uint16_t u16Size)
{
    uint16_t u16Dist = 0;
    int16_t s16Temp = 0;
    uint16_t i;
    for (i = 0; i < u16Size; i++)
    {
        s16Temp = ((int16_t)*(u16DataA + i) - ((int16_t)*(u16DataB + i)));
        s16Temp = s16Temp * s16Temp;
        u16Dist += (uint16_t)s16Temp;
    }
    u16Dist = (uint16_t)sqrt(u16Dist);
    return u16Dist;
}

又称“棋盘距离”，定义为两个点在任意坐标维度上的差值的最大值，设空间中X的坐标为
Y的坐标为
X与Y之间的切比雪夫距离为

uint16_t ChebyshevDistance(uint16_t *u16DataA, uint16_t *u16DataB, uint16_t u16Size)
{
    int16_t s16Temp = 0;
    uint16_t i;
    s16Temp = 0;
    uint16_t u16Max = 0;;
    for (i = 0; i < u16Size; i++)
    {
        s16Temp = ((int16_t)*(u16DataA + i) - ((int16_t)*(u16DataB + i)));//
        s16Temp = abs(s16Temp);
        if (s16Temp > u16Max)
        {
            u16Max = s16Temp;
        }
    }
    return u16Max;
}

又被称为“出租车距离”、“街区距离”，设空间中X的坐标为
Y的坐标为
X与Y之间的曼哈顿距离为

uint16_t ManhattanDistance(uint16_t *u16DataA, uint16_t *u16DataB, uint16_t u16Size)
{
	uint16_t u16Dist = 0;
    int16_t s16Temp = 0;
    uint16_t i;
    s16Temp = 0;
    for (i = 0; i < u16Size; i++)
    {
        s16Temp = ((int16_t)*(u16DataA + i) - ((int16_t)*(u16DataB + i)));//
        s16Temp = abs(s16Temp);
		u16Dist += (uint16_t)s16Temp;        
    }
    return u16Dist;
}

注意：以上各段程序均需包含math.h头文件

#include 

各程序均已在STM32F103系列单片机中测试成功。