VC6.0图像处理3--灰度变换

深碍√TFBOYSˉ_ 2022-06-18 01:38 291阅读 0赞

源码下载：[http://download.csdn.net/detail/renshengrumenglibing/3875522][http_download.csdn.net_detail_renshengrumenglibing_3875522]

//书接前文，我们继续看一些灰度操作，由于比较简单，我们多放几个函数

//添加菜单以及处理函数

void CBMPViewerDoc::OnMenuitem32777() //灰度拉伸  
\{  
// TODO: Add your command handler code here  
  
int linewidth;  
linewidth=(pbi->bmiHeader.biWidth\*pbi->bmiHeader.biBitCount+31)/32\*4;  
  
  
int r1  = 60;  
int r2 = 200;  
double  k = 1.5;  
// TODO: Add your command handler code here  
  
  
  
  
// TODO: Add your command handler code here  
for(int i = 0 ; i< bi.biHeight ; i++)\{  
for(int j = 0 ; j< bi.biWidth ; j++)\{  
unsigned char \*lpScr;  
lpScr = (unsigned char \*)lpBuf+linewidth\*(bi.biHeight - i -1) + j;  
  
  
//\*(lpScr) = BYTE((\*lpScr - min)\*256/(max- min));  
//\*(lpScr) = BYTE(0);  
  
  
if(\*lpScr < r1)\{  
\*lpScr = BYTE(\*lpScr/ k);  
\}  
else if(\*lpScr < r2)\{  
\*lpScr = BYTE((\*lpScr - r1)\*k + r1/k);  
\}  
else \{  
\*lpScr = BYTE((\*lpScr - r2)/k + 255 -(255 -r2)/k);  
\}  
\}  
  
\}  
       UpdateAllViews(NULL,0,NULL);  
  
\}

void CBMPViewerDoc::OnMenuitem32780() //亮度增减  亮度增加20  
\{  
// TODO: Add your command handler code here  
int linewidth;  
linewidth=(pbi->bmiHeader.biWidth\*pbi->bmiHeader.biBitCount+31)/32\*4;  
  
  
// TODO: Add your command handler code here  
for(int i = 0 ; i< bi.biHeight ; i++)\{  
for(int j = 0 ; j< bi.biWidth ; j++)\{  
unsigned char \*lpScr;  
lpScr = (unsigned char \*)lpBuf+linewidth\*(bi.biHeight - i -1) + j;  
if(\*lpScr < 235)\{  
\*(lpScr) = BYTE(\*lpScr +20);  
\}  
else \*lpScr = BYTE(255);  
\}  
  
\}  
  
//Invalidata(TRUE);  
UpdateAllViews(NULL,0,NULL);  
  
\}  
  
  
void CBMPViewerDoc::OnMenuitem32781() //取对数  
\{  
// TODO: Add your command handler code here  
int linewidth;  
linewidth=(pbi->bmiHeader.biWidth\*pbi->bmiHeader.biBitCount+31)/32\*4;  
  
  
// TODO: Add your command handler code here  
for(int i = 0 ; i< bi.biHeight ; i++)\{  
for(int j = 0 ; j< bi.biWidth ; j++)\{  
unsigned char \*lpScr;  
lpScr = (unsigned char \*)lpBuf+linewidth\*(bi.biHeight - i -1) + j;  
double c ;  
c = 255/log(255);  
\*lpScr  = BYTE(c\*log(\*lpScr +1));  
\}  
  
\}  
  
//Invalidata(TRUE);  
UpdateAllViews(NULL,0,NULL);  
  
\}  
  
  
void CBMPViewerDoc::OnMenuitem32782() //取指数  
\{  
// TODO: Add your command handler code here  
int linewidth;  
linewidth=(pbi->bmiHeader.biWidth\*pbi->bmiHeader.biBitCount+31)/32\*4;  
  
  
// TODO: Add your command handler code here  
for(int i = 0 ; i< bi.biHeight ; i++)\{  
for(int j = 0 ; j< bi.biWidth ; j++)\{  
unsigned char \*lpScr;  
lpScr = (unsigned char \*)lpBuf+linewidth\*(bi.biHeight - i -1) + j;  
double c ;  
c = 255/pow(255 ,2);  
\*lpScr  = BYTE(c\*pow(\*lpScr , 2));  
\}  
  
\}  
  
//Invalidata(TRUE);  
UpdateAllViews(NULL,0,NULL);  
  
\}

void CBMPViewerDoc::OnMenuitem32785() //降低亮度  
\{  
// TODO: Add your command handler code here  
int linewidth;  
linewidth=(pbi->bmiHeader.biWidth\*pbi->bmiHeader.biBitCount+31)/32\*4;  
  
  
// TODO: Add your command handler code here  
for(int i = 0 ; i< bi.biHeight ; i++)\{  
for(int j = 0 ; j< bi.biWidth ; j++)\{  
unsigned char \*lpScr;  
lpScr = (unsigned char \*)lpBuf+linewidth\*(bi.biHeight - i -1) + j;  
  
if(\*lpScr > 20)\{  
\*(lpScr) = BYTE(\*lpScr -20);  
\}  
else \*lpScr = BYTE(0);  
\}  
  
\}  
  
//Invalidata(TRUE);  
UpdateAllViews(NULL,0,NULL);  
\}

[http_download.csdn.net_detail_renshengrumenglibing_3875522]: http://download.csdn.net/detail/renshengrumenglibing/3875522