vc平台读写bmp灰度图像
时间: 2023-07-06 09:41:06 浏览: 52
在VC平台中,读写bmp灰度图像可以通过以下步骤实现:
1. 读取灰度图像
```c++
FILE* fp = fopen("image.bmp", "rb");
if (fp == NULL) {
printf("File open error!\n");
return -1;
}
unsigned char header[54];
fread(header, sizeof(unsigned char), 54, fp);
int width = *(int*)&header[18];
int height = *(int*)&header[22];
int dataOffset = *(int*)&header[10];
int imageSize = width * height;
unsigned char* imageData = new unsigned char[imageSize];
fread(imageData, sizeof(unsigned char), imageSize, fp);
fclose(fp);
```
2. 写入灰度图像
```c++
FILE* fp = fopen("output.bmp", "wb");
if (fp == NULL) {
printf("File open error!\n");
return -1;
}
unsigned char header[54] = { 0 };
header[0] = 'B';
header[1] = 'M';
*(int*)&header[2] = 54 + imageSize;
*(int*)&header[10] = 54;
*(int*)&header[14] = 40;
*(int*)&header[18] = width;
*(int*)&header[22] = height;
header[26] = 1;
header[28] = 8;
fwrite(header, sizeof(unsigned char), 54, fp);
fwrite(imageData, sizeof(unsigned char), imageSize, fp);
fclose(fp);
```
注意:上述代码中只处理了灰度图像,如果要处理彩色图像,需要对图像像素进行处理。同时,还需要注意文件读写的错误处理。
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