试编写 用邻域平均法进行图像平滑的c语言程序,包括读取图片、初始化、主函数处理等步骤,假设邻域为(3×3)邻域,像素尺寸为8*8。。
时间: 2023-05-26 20:01:38 浏览: 51
以下是用邻域平均法进行图像平滑的C语言程序:
```C
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define ROWS 8
#define COLS 8
#define NEIGHBORHOOD_SIZE 3
void readImage(unsigned char *image, char *filename){
FILE *file = fopen(filename, "rb");
fseek(file, 54, SEEK_SET); // skip the header
fread(image, ROWS*COLS, 1, file);
fclose(file);
}
void initialize(unsigned char *image, unsigned char *smoothed_image){
memcpy(smoothed_image, image, ROWS*COLS);
}
void smooth(unsigned char *image, unsigned char *smoothed_image){
int i, j, k, l, sum;
for(i=0; i<ROWS; i++){
for(j=0; j<COLS; j++){
sum = 0;
for(k=-NEIGHBORHOOD_SIZE/2; k<=NEIGHBORHOOD_SIZE/2; k++){
for(l=-NEIGHBORHOOD_SIZE/2; l<=NEIGHBORHOOD_SIZE/2; l++){
if(i+k>=0 && i+k<ROWS && j+l>=0 && j+l<COLS){
sum += image[(i+k)*COLS+(j+l)];
}
}
}
smoothed_image[i*COLS+j] = sum/(NEIGHBORHOOD_SIZE*NEIGHBORHOOD_SIZE);
}
}
}
void saveImage(unsigned char *image, char *filename){
FILE *file = fopen(filename, "wb");
unsigned char header[54] = {
0x42,0x4d,0x36,0x00,0x0c,0x00,0x00,0x00,
0x00,0x00,0x36,0x00,0x00,0x00,0x28,0x00,
0x00,0x00,0x08,0x00,0x00,0x00,0x08,0x00,
0x00,0x00,0x01,0x00,0x08,0x00,0x00,0x00,
0x00,0x00,0x00,0x0c,0x00,0x00,0x10,0x00,
0x00,0x00,0x00,0x00,0x0c,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};
fwrite(header, 54, 1, file);
fwrite(image, ROWS*COLS, 1, file);
fclose(file);
}
int main(int argc, char *argv[]){
unsigned char image[ROWS*COLS], smoothed_image[ROWS*COLS];
readImage(image, "input.bmp");
initialize(image, smoothed_image);
smooth(image, smoothed_image);
saveImage(smoothed_image, "output.bmp");
return 0;
}
```
这段代码首先定义了图片的行数和列数等常量,然后分别实现了读取图片、初始化、平滑处理和保存图片的函数。其中smoothing函数实现了邻域平均法的核心算法,遍历所有像素,对每个像素计算邻域内像素的平均值并将其赋值给平滑后的图像像素,最后调用saveImage函数将平滑后的图像保存为输出文件。在main函数中,首先读取输入图像,然后对其进行初始化,并对其进行平滑处理,最后保存平滑后的图像到输出文件。
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