图像腐蚀与膨胀（用CImage处理），使用快速处理图像灰度值

超、凢脫俗 2022-05-17 20:10 190阅读 0赞

1.用快速读写进行颜色转变

\#include<iostream>

\#include<atlimage.h>

using namespace std;

int main()

const char \*srcFilePath = "21a.jpg", \*destFilePath = "21b.jpg";

CImage srcImage;

srcImage.Load(srcFilePath);

int width = srcImage.GetWidth(), height = srcImage.GetHeight();

int bpp = srcImage.GetBPP(), pitch = srcImage.GetPitch();

BYTE \*pData = (BYTE \*)srcImage.GetBits();

for (int y = 0; y < height; y++)

for (int x = 0; x < width; x++)

BYTE b = \*(pData + pitch \* y + x \* bpp / 8 + 0);

BYTE g = \*(pData + pitch \* y + x \* bpp / 8 + 1);

BYTE r = \*(pData + pitch \* y + x \* bpp / 8 + 2);

\*(pData + pitch \* y + x \* bpp / 8 + 0) = r;

\*(pData + pitch \* y + x \* bpp / 8 + 1) = g;

\*(pData + pitch \* y + x \* bpp / 8 + 2) = b;

srcImage.Save(destFilePath);

return 0;

![70][]![70 1][]

2.用快速读写改变颜色灰度值

\#include<iostream>

\#include<atlimage.h>

using namespace std;

int main()

const char \*srcFilePath = "22a.jpg", \*destFilePath = "22b.jpg";

CImage srcImage;

srcImage.Load(srcFilePath);

int width = srcImage.GetWidth(), height = srcImage.GetHeight();

int bpp = srcImage.GetBPP(), pitch = srcImage.GetPitch();

BYTE \*pData = (BYTE \*)srcImage.GetBits();

for (int y = 0; y < height; y++)

for (int x = 0; x < width; x++)

BYTE b = \*(pData + pitch \* y + x \* bpp / 8 + 0);

BYTE g = \*(pData + pitch \* y + x \* bpp / 8 + 1);

BYTE r = \*(pData + pitch \* y + x \* bpp / 8 + 2);

BYTE gray = (BYTE)round(r\*0.299 + g \* 0.587 + b \* 0.114);

\*(pData + pitch \* y + x \* bpp / 8 + 0) = gray;

\*(pData + pitch \* y + x \* bpp / 8 + 1) = gray;

\*(pData + pitch \* y + x \* bpp / 8 + 2) = gray;

srcImage.Save(destFilePath);

return 0;

![70 2][]![70 3][]

3.实现腐蚀和膨胀函数

腐蚀：

\#include<iostream>

\#include<atlimage.h>

using namespace std;

int main()

const char \*srcFilePath = "23a.jpg", \*destFilePath = "23b2.jpg";

CImage srcImage;

srcImage.Load(srcFilePath);

int width = srcImage.GetWidth(), height = srcImage.GetHeight();

int bpp = srcImage.GetBPP(), pitch = srcImage.GetPitch();

BYTE \*pData = (BYTE \*)srcImage.GetBits();

int \*\*a = new int\*\[height\];

for (int i = 0; i < height; i++)

a\[i\] = new int\[width\];

for (int y = 0; y < height; y++)

for (int x = 0; x < width; x++)

BYTE b = \*(pData + pitch \* y + x \* bpp / 8 + 0);

BYTE g = \*(pData + pitch \* y + x \* bpp / 8 + 1);

BYTE r = \*(pData + pitch \* y + x \* bpp / 8 + 2);

BYTE gray = (BYTE)round(r\*0.299 + g \* 0.587 + b \* 0.114);

\*(pData + pitch \* y + x \* bpp / 8 + 0) = gray;

\*(pData + pitch \* y + x \* bpp / 8 + 1) = gray;

\*(pData + pitch \* y + x \* bpp / 8 + 2) = gray;

a\[y\]\[x\] = gray;

for (int y = 3; y < height - 3; y++) //忽略一点点边缘

for (int x = 3; x <width - 3; x++)

if (a\[y\]\[x - 1\] < 20 && a\[y\]\[x + 1\] < 20)

if (a\[y - 1\]\[x\]< 20 && a\[y + 1\]\[x\] < 20)

if (a\[y + 1\]\[x - 1\] < 20 && a\[y - 1\]\[x - 1\] < 20)

if (a\[y - 1\]\[x + 1\] <20 && a\[y + 1\]\[x + 1\] < 20)

if (a\[y\]\[x - 3\] < 20 && a\[y\]\[x + 3\] < 20)

if (a\[y - 3\]\[x\] < 20 && a\[y + 3\]\[x\] < 20)

if (a\[y + 3\]\[x - 3\] < 20 && a\[y - 3\]\[x - 3\] < 20)

if (a\[y - 3\]\[x + 3\] < 20 && a\[y + 3\]\[x + 3\] < 20)

\*(pData + pitch \* y + x \* bpp / 8 + 0) = 1;

\*(pData + pitch \* y + x \* bpp / 8 + 1) = 1;

\*(pData + pitch \* y + x \* bpp / 8 + 2) = 1;

else

\*(pData + pitch \* y + x \* bpp / 8 + 0) = 255;

\*(pData + pitch \* y + x \* bpp / 8 + 1) = 255;

\*(pData + pitch \* y + x \* bpp / 8 + 2) = 255;

srcImage.Save(destFilePath);

return 0;

腐蚀前：

![70 4][]腐蚀后：![70 5][]

**膨胀：**

\#include<iostream>

\#include<atlimage.h>

using namespace std;

int main()

const char \*srcFilePath = "23a.jpg", \*destFilePath = "23c.jpg";

CImage srcImage;

srcImage.Load(srcFilePath);

int width = srcImage.GetWidth(), height = srcImage.GetHeight();

int bpp = srcImage.GetBPP(), pitch = srcImage.GetPitch();

BYTE \*pData = (BYTE \*)srcImage.GetBits();

int \*\*a = new int\*\[height\];

for (int i = 0; i < height; i++)

a\[i\] = new int\[width\];

for (int y = 0; y < height; y++)

for (int x = 0; x < width; x++)

BYTE b = \*(pData + pitch \* y + x \* bpp / 8 + 0);

BYTE g = \*(pData + pitch \* y + x \* bpp / 8 + 1);

BYTE r = \*(pData + pitch \* y + x \* bpp / 8 + 2);

BYTE gray = (BYTE)round(r\*0.299 + g \* 0.587 + b \* 0.114);

\*(pData + pitch \* y + x \* bpp / 8 + 0) = gray;

\*(pData + pitch \* y + x \* bpp / 8 + 1) = gray;

\*(pData + pitch \* y + x \* bpp / 8 + 2) = gray;

a\[y\]\[x\] = gray;

for (int y = 2; y < height - 2; y++) //忽略一点点边缘,防止溢出

for (int x = 2; x <width- 2; x++)

if (a\[y\]\[x - 1\] > 30 && a\[y\]\[x + 1\] > 30)

if (a\[y - 1\]\[x\] > 30 && a\[y + 1\]\[x\] > 30)

if (a\[y + 1\]\[x - 1\] > 30 && a\[y - 1\]\[x - 1\] > 30)

if (a\[y - 1\]\[x + 1\] > 30 && a\[y + 1\]\[x + 1\] > 30)

if (a\[y\]\[x - 2\] > 30 && a\[y\]\[x + 2\] > 30)

if (a\[y - 2\]\[x\] > 30 && a\[y + 2\]\[x\] > 30)

if (a\[y + 2\]\[x - 2\] > 30 && a\[y - 2\]\[x - 2\] > 30)

if (a\[y - 2\]\[x + 2\] > 30 && a\[y + 2\]\[x + 2\] > 30)

\*(pData + pitch \* y + x \* bpp / 8 + 0) = 255;

\*(pData + pitch \* y + x \* bpp / 8 + 1) = 255;

\*(pData + pitch \* y + x \* bpp / 8 + 2) = 255;

else

\*(pData + pitch \* y + x \* bpp / 8 + 0) = 1;

\*(pData + pitch \* y + x \* bpp / 8 + 1) = 1;

\*(pData + pitch \* y + x \* bpp / 8 + 2) = 1;

srcImage.Save(destFilePath);

return 0;

原图：  
![70 6][]膨胀后：![70 7][]

[70]: https://img-blog.csdn.net/20180802112453894?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E2NjY2Nl8=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 1]: /images/20220518/f688deaab8ae4dedbcaf524513ee41e0.png
[70 2]: https://img-blog.csdn.net/20180802112701241?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E2NjY2Nl8=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 3]: /images/20220518/35a06574b0d8489fb83026955a9b8aca.png
[70 4]: https://img-blog.csdn.net/20180802113120731?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E2NjY2Nl8=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 5]: /images/20220518/3815ae59a46341a0af2a8031d1b5a820.png
[70 6]: https://img-blog.csdn.net/20180802113439255?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E2NjY2Nl8=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 7]: /images/20220518/fcb26695f9184892b8363ad944a3fe30.png