针对给定的二值图像,采用8链码对图像轮廓进行描述,给出链码描述结果,并计算循环首差链码。(采用C或C++语言实现)
时间: 2024-03-23 16:39:15 浏览: 158
好的,以下是使用C++语言实现二值图像8链码描述和循环首差链码计算的示例代码:
```cpp
#include <iostream>
#include <vector>
using namespace std;
// 定义8个方向的偏移量
const int dx[] = {0, 1, 1, 1, 0, -1, -1, -1};
const int dy[] = {-1, -1, 0, 1, 1, 1, 0, -1};
// 获取给定像素点的8链码
int getChainCode(const vector<vector<int>>& img, int x, int y) {
// 判断像素点是否为边界点
if (img[y][x] == 0) {
return -1;
}
// 搜索8个方向的像素点
int cur_dir = 7;
int next_x = x + dx[cur_dir];
int next_y = y + dy[cur_dir];
while (next_x != x || next_y != y) {
if (img[next_y][next_x] == 1) {
// 找到了下一个边界点
return cur_dir;
}
cur_dir = (cur_dir + 1) % 8;
next_x = x + dx[cur_dir];
next_y = y + dy[cur_dir];
}
// 如果没有找到下一个边界点,则返回-1
return -1;
}
// 计算给定8链码的循环首差链码
int getCircuFirstDiff(const vector<int>& chain_code) {
int n = chain_code.size();
int sum = 0;
for (int i = 0; i < n; i++) {
int diff = (chain_code[(i+1)%n] - chain_code[i] + 8) % 8;
sum += diff;
}
return sum % 8;
}
// 主函数
int main() {
// 定义二值图像
vector<vector<int>> img = {
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
{0, 0, 1, 1, 1, 0, 0, 0, 0, 0},
{0, 0, 1, 0, 1, 0, 0, 0, 0, 0},
{0, 0, 1, 0, 1, 0, 0, 0, 0, 0},
{0, 0, 1, 0, 1, 0, 0, 0, 0, 0},
{0, 0, 1, 0, 1, 0, 0, 0, 0, 0},
{0, 0, 1, 0, 1, 0, 0, 0, 0, 0},
{0, 0, 1, 0, 1, 0, 0, 0, 0, 0},
{0, 0, 1, 1, 1, 0, 0, 0, 0, 0},
};
// 定义链码和循环首差链码
vector<int> chain_code;
int circu_first_diff = 0;
// 搜索起点
int start_x = -1;
int start_y = -1;
for (int y = 0; y < img.size(); y++) {
for (int x = 0; x < img[y].size(); x++) {
if (img[y][x] == 1) {
start_x = x;
start_y = y;
break;
}
}
if (start_x != -1) {
break;
}
}
// 如果找到了起点,开始搜索8链码
if (start_x != -1) {
chain_code.push_back(getChainCode(img, start_x, start_y));
int cur_dir = chain_code[0];
int next_x = start_x + dx[cur_dir];
int next_y = start_y + dy[cur_dir];
while (next_x != start_x || next_y != start_y) {
chain_code.push_back(getChainCode(img, next_x, next_y));
cur_dir = (chain_code.back() + 4) % 8;
next_x += dx[cur_dir];
next_y += dy[cur_dir];
}
// 计算循环首差链码
circu_first_diff = getCircuFirstDiff(chain_code);
}
// 输出结果
cout << "链码描述结果:";
for (int i = 0; i < chain_code.size(); i++) {
cout << chain_code[i];
}
cout << endl;
cout << "循环首差链码:" << circu_first_diff << endl;
return 0;
}
```
以上代码将搜索二值图像中的起点,然后使用8链码描述图像轮廓,并计算循环首差链码。您可以根据需要调整代码以适应您的输入图像。
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