minSAD = VALUE_MAX;

// 在匹配的图像中进行循环
for ( size_t x = 0; x <= S_cols - T_cols; x++ ) {
    for ( size_t y = 0; y <= S_rows - T_rows; y++ ) {
        SAD = 0.0;

        // 在模板的图像中进行循环
        for ( size_t j = 0; j < T_cols; j++ )
            for ( size_t i = 0; i < T_rows; i++ ) {

                pixel p_SearchIMG = S[y+i][x+j];
                pixel p_TemplateIMG = T[i][j];
		
                SAD += abs( p_SearchIMG.Grey - p_TemplateIMG.Grey );
            }

        // 保存寻找到的最佳位置
        if ( minSAD > SAD ) { 
            minSAD = SAD;
            position.bestRow = y;
            position.bestCol = x;
            position.bestSAD = SAD;
        }
    }
    
}