端端舝

C++/CLI
生奶氾奴皮仿奶皮仿伉仿永疋件
弘⻌嬡

� 豜�

歹氏仁引肮襠𡌂儔辭�頗 #69

赻撩畿賡
? HN � 豜�
? Twitter @akatukisiden
? 爛溵 25鬏
? 白伉奈皿伕弘仿穴奈
? 妏蚚晟惤
C++﹜C++/CLI﹜C#
? 政婓及云帊岈
Kinect(OpenNI)﹜OpenCV﹜MIDI


穴生奈斥戊奈玉午生奶氾奴皮戊奈玉
眈誑綅蚚氾弁用伕斥

? P/Invoke
? COM
? C++/CLI


Platform Invoke (P/Invoke)
? DLL井日C 旦正奶伙及生奶氾奴皮憝杅毛網太堤允﹝
? 目永母白央奶伙及ロ�毛
.NET�卞蚚砩允月斛猁互丐月﹝
? .NET Framework及囀窒匹方仁妏蚚今木化中月
? 竘杅及穴生奈斥↘↙生奶氾奴皮劐𡥼戊旦玄卞樓
尹
珨隙及網太堤仄匹x86韜鍔10‵30�煦及
左奈田奈目永玉互�S月
? 升氏卅憝杅匹手淏都卞網太堤六月歹仃匹反卅中


COM眈誑綅蚚
? I Unknown
? 穴生奈斥戊奈玉井日COM奶件正奈白尼奶旦毛妏
蚚﹜
引凶反穴生奈斥API毛 COM奶件正奈白尼奶旦
午仄化
鼠嶱允月辻夔
? Office憝窣支﹜WinRT卅升匹妏歹木化中月
? 媆嶲戊旦玄反C++/CLI午肮最僅


C++/CLI
? C休
? 穴生奈斥戊奈玉云方太生奶氾奴皮戊奈玉
互髦婓允月失本件皮伉毛釬傖允月
? P/Invoke午反綃中﹜�凶醴反癶籵及
穴生奈斥左皮斥尼弁玄卞允月仇午互褫夔
? 云公日仁﹜升氏卅弁仿旦?憝杅匹手仿永皿
褫夔


踏隙反
賒砉�I燴仿奶皮仿伉OpenCV及仿永皿毛籵仄
化
C++/CLI毛蚚中凶
.NET匹及生奶氾奴皮戊奈玉及瞳蚚卞勾中化
畿賡仄引允﹝
↗ 目永母白央奶伙卞哫晟午隅膽﹜�I源引午戶化𤩸中化中
引允互﹜灍蕣反煦仃化𤩸中化仁分今中


穴生奈斥倰

�?統桽␜犯白巧
伙玄 Public private
失弁本旦硌隅赽

統桽倰 ref struct; ref class;

�倰 value struct; value class;

? class struct及妏中源反C++眈絞
? �倰?統桽倰反公及ゴ卞勾仃月value/ref匹𢜪引
月﹝
? 統桽倰及甩件玉伙反倰靡及摽欠卞␞毛勾仃化桶
允

撻倛脹及扔奶朮毛桶允�婖极
CvSize毛仿永皿允月


Wrap1 郔腴癹及仿永皿 (CvSize)
public ref class CvSize
{
public:
CvSize(void)
{ ptr = new ::CvSize; }

~CvSize()
{ this -> !CvSize(); }

!CvSize()
{ delete ptr; }
internal:
::CvSize* ptr;
};


Wrap1 郔腴癹及仿永皿 (CvSize)
? ref class
? 生奶氾奴皮左皮斥尼弁玄及禾奶件正毛
internal丟件田午仄化厥凶六月﹝
? 戊件旦玄仿弁正匹左皮斥尼弁玄毛汜傖
? 犯旦玄仿弁正/白央奶瓜仿奶扒匹勹�
? 犯旦玄仿弁正(~Class())反Dispose(true)眈絞
? 白央奶瓜仿奶扒(!Class())反Dispose(false) 眈絞
? 白央奶瓜仿奶扒反籵都及憝杅午仄化網太堤仄褫
夔


Wrap2 價掛倰丟件田劐杅及鼠嶱 (CvSize)
public ref class CvSize
{
// ‵‵謹‵‵
public:
property int width
{
int get(){ return ptr_->width;}
void set( int value ){ ptr_->width = value; }
}
property int height
{
int get(){return ptr_->height;}
void set(int value){ptr_->height = value; }
}
internal:
::CvSize* ptr_
};


Wrap2 價掛倰丟件田劐杅及鼠嶱 (CvSize)

? 丟件田劐杅反皿伕由氾奴午仄化鼠嶱允月
? Internal禾奶件正毛籵仄化丟件田劐杅卞失弁本旦
? 價掛倰反穴生奈斥﹜生奶氾奴皮嶲匹誑𡥼俶衄曰


OpenCV賒砉弁仿旦
IplImage毛仿永皿允月


Wrap3 禾奶件正匹奪燴允月弁仿旦
(IplImage)
public ref class IplImage
{
public:
IplImage(CvSize^ size,int depth,int channels)
{ ptr = ::cvCreateImage(*size->ptr,depth,channels);}

~IplImage(){ this->!IplImage(); }

!IplImage()
{
pin_ptr<::IplImage*> pin_Image = &ptr;
::cvReleaseImage(pin_Image);
}
internal:
::IplImage* ptr;
};


Wrap3 禾奶件正匹奪燴允月弁仿旦
(IplImage)
? 黃赻及汜傖憝杅﹜賤溫憝杅毛厥切﹜
奶件旦正件旦反禾奶件正匹奪燴允月弁仿旦
? 汜傖?賤溫憝杅赻极反戊件旦玄仿弁正﹜
白央奶瓜仿奶扒囀匹網太堤允﹝
? 母皮伙禾奶件正毛竘杅卞龰月憝杅(賤溫憝杅)反
公及引引匹反布矛戊伊匹失玉伊旦互劐歹月
褫夔俶互丐月午中丹巨仿奈互逃汜允月及匹
pin_ptr<T*>匹失玉伊旦毛嘐隅允月


賒砉白央奶伙掂心煋心憝杅
cvLoadImage毛
戊件旦玄仿弁正午仄化仿永皿


Wrap4 恅趼蹈劐𡥼(cvLoadImage)
{
// ‵‵謹‵‵
public:
IplImage(System::String^ str, int iscolor)
{
const char* chars = (const char*)
System::Runtime::InteropServices::Marshal
::StringToHGlobalAnsi(str).ToPo
inter();

this->ptr = ::cvLoadImage(chars ,iscolor);

System::Runtime::InteropServices::Marshal
::FreeHGlobal(System::IntPtr((vo
id*)chars));
}
// ‵‵謹‵‵
};

Wrap4 恅趼蹈劐𡥼(cvLoadImage)
? System.String井日char*卞劐𡥼
? 穴生奈斥?失件穴生奈斥及劐𡥼蚚及憝杅毛引午
戶凶Marshal弁仿旦及丟件田毛妏蚚
? IntPtr Marshal::StringToHGlobalAnsi(string);
String 及囀⺍毛失件穴生奈斥丟乒伉卞戊疋奈仄﹜
戊疋奈媆卞 ANSI 倛宒卞劐𡥼仄引允﹝
? void Marshal::FreeHGlobal(IntPtr);
失件穴生奈斥丟乒伉井日賃曰絞化日木凶丟乒伉毛
賤溫仄引允﹝


仄五中��I燴憝杅
cvThreshold毛仿永皿允月


Wrap5 憝杅及仿永皿(cvThreshold)
{
// ‵‵謹‵‵
double cvThreshold( IplImage^ src, IplImage^ dst,
double threshold, double max_value, int
threshold_type )
{
return ::cvThreshold(src->ptr, dst->ptr,
threshold, max_value,
threshold_type);
}
};


Wrap5 憝杅及仿永皿(cvThreshold)
? 左皮斥尼弁玄毛竘杅卞龰月手及反
囀窒禾奶件正毛ㄗ斛猁卅日*毛勾仃化ㄘ傾允﹝
? 價掛倰竘杅反公及引引傾六月﹝


午曰丐尹內珨隙灍俴仄化心月

↗ 桶尨卞斛猁卅憝杅反軑戶仿永皿𦤦
心


桶尨蚚憝杅縣
using namespace System::Runtime::InteropServices;
public ref class GUI
{
public:
static int cvNamedWindow( System::String^ str, int flags )
{
Marshal::StringToHGlobalAnsi(str).ToPointer();
int r = ::cvNamedWindow(chars,flags);
Marshal::FreeHGlobal(System::IntPtr((void*)chars));

return r;
}


桶尨蚚憝杅
static void cvDestroyWindow( System::String^ str)
{
Marshal::StringToHGlobalAnsi(str).ToPointer();
::cvDestroyWindow( chars );
Marshal::FreeHGlobal( System::IntPtr((void*)chars));
}

static void cvShowImage( System::String^ name,IplImage^ image)
{
Marshal::StringToHGlobalAnsi(name).ToPointer();
::cvShowImage( chars ,image->ptr);
Marshal::FreeHGlobal( System::IntPtr((void*)chars));
}
static int cvWaitKey(int delay)
{ return ::cvWaitKey(delay); }
};


灍俴戊奈玉 C#

class Program
{
static void Main( string[] args)
{
GUI.cvNamedWindow( "window" , 1);

IplImage loadedImage = new IplImage( "wankuma.png§ , 0);

GUI.cvShowImage( "window§ , loadedImage);
GUI.cvWaitKey(0);

CvSize size = new CvSize();
size.width = loadedImage.width;
size.height = loadedImage.height;
IplImage img2 = new IplImage(size, loadedImage.depth,
loadedImage.nChannels );


灍俴戊奈玉 C#

IplImage.cvThreshold(loadedImage, img2, 205, 255, 0);

GUI.cvShowImage( "window" , img2);
GUI.cvWaitKey(0);

GUI.cvDestroyWindow( "window" );
}
}


媼�賒砉井日�廖午
公及俋諉撻倛毛龰腕允月


Wrap6
�廖弁仿旦反丟乒伉旦玄伊奈斥
CvMemStorage囀卞復悵今木月及匹
引內反CvMemStorage毛仿永皿


Wrap6 丟乒伉旦玄伊奈斥 CvMemStorage
public ref class CvMemStorage
{
public:
CvMemStorage( int block_size)
{ ptr_ = ::cvCreateMemStorage(block_size); }

~CvMemStorage() { this->!CvMemStorage();}

!CvMemStorage()
{
pin_ptr< ::CvMemStorage* > p = &(this->ptr_ );
::cvReleaseMemStorage( p ) ;
}
static void cvClearMemStorage(CvMemStorage^ storage)
{ ::cvClearMemStorage(storage->ptr_ ); }

internal:
::CvMemStorage* ptr_;
};


Wrap6 丟乒伉旦玄伊奈斥 CvMemStorage

? 戊件旦玄仿弁正匹旦玄伊奈斥汜傖
? 白央奶瓜仿奶扒匹�賤溫
? 賃曰絞化𦤦心旦玄伊奈斥及賤溫憝杅
每 void cvClearMemStorage(CvMemStorage^ storage);


wrap7
�廖弁仿旦CvContour反汜傖?勹�及源楊互
杻忷卅及匹
珂卞公及丟件田劐杅rect(CvRect倰)毛仿永皿
仄
皿伕由氾奴午仄化鼠嶱允月


Wrap7 恚磁倰丟件田劐杅毛皿伕由氾奴午仄化鼠嶱
(CvContour::rect)

Class A午公及丟件田B毛仿永皿仄凶手及互


(CvContour::rect)

ClassA及仿永由奈互B及仿永由奈毛丟件田卞厥勾方
丹卞�尹月方丹卞允月斛猁互丐月


(CvContour::rect)
public ref class CvContour
{
public:
// ‵‵謹‵‵
property CvRect^ rect
{
CvRect^ get()
{
return gcnew CvRect(&ptr_->rect);
}
void set(CvRect^ value)
{
*ptr_->rect = *(value->ptr_);
}
}
internal:
::CvContour* ptr_;
};


(CvContour::rect)
public ref class CvRect ~CvRect()
{ { this->!CvRect();}
public:
// ‵‵謹‵‵ !CvRect()
CvRect() {
{ if(!noalloc_)
noalloc_ = false; {
this-> ptr_ = new ::CvRect; delete ptr_;
} }
this->ptr_ = nullptr;
CvRect( ::CvRect* pRect) }
{ private:
noalloc_ = true; bool noalloc_ ;
this->ptr_ = pRect;
} Internal:
::CvRect* ptr_;
}


(CvContour::rect)
? 皿伕由氾奴及getter匹反禾奶件正毛忳仃龰
月戊件旦玄仿弁正毛蚚中化﹜
仿永由奈左皮斥尼弁玄毛釬傖(gcnew)允月﹝
? 禾奶件正毛忳仃龰月戊件旦玄仿弁正匹場ヽ
趙仄凶�磁反準勹𠧧白仿弘毛蕾化﹜白央奶
瓜仿奶扒匹delete仄卅中方丹卞允月﹝
? setter匹反value�及囀窒禾奶件正及硌允�
毛戊疋奈允月﹝


wrap8
�廖旦平乓件弁仿旦
CvContourScanner
�廖旦平乓件憝杅�
cvStartFindContours
cvFindNextContour
cvEndFindContours
及仿永皿


Wrap8 �廖旦平乓件憝窣

妏中源互恚螝卅及匹
引內C++�匹升及方丹卞妏丹井毛復庲


Wrap8 �廖旦平乓件憝窣ㄗC++ㄘ
IplImage img_th = ��I燴摽及賒砉
CvContourScanner scanner = cvStartFindContours(img_th, storage);

CvContour* contour;
do
{
contour = reinterpret_cast< CvContour*>
( cvFindNextContour(scanner) );
if(contour != nullptr)
{
CvRect rect = contour->rect;
}
}
while (contour != nullptr);
contour = reinterpret_cast<CvContour*>(cvEndFindContours(&scanner));
cvClearMemStorage(contour->storage);


Wrap8 �廖旦平乓件憝窣ㄗC++ㄘ
? CvContourScanner 反_CvContourScanner*及typedef
? CvContourScanner及隅膽反目永母白央奶伙卞卅中
? cvStartFindContours(img,storage)反��I燴𦤦心賒砉午﹜
�廖左皮斥尼弁玄及復悵卞勾井丹丟乒伉旦玄伊奈斥毛竘杅卞午曰
CvContourScanner 毛汜傖
? cvFindNextContour反﹜�廖毛珨勾龰腕
? cvEndFindContours反CvContourScanner 毛勹�仄﹜
�窒及�廖犯奈正毛龰腕丟件田劐杅毛凶升勻化�e及�廖及龰腕手
褫夔
? cvClearMemStorage(storage)匹�廖犯奈正及賤溫ㄚ丟乒伉旦玄伊奈
斥卞丟乒伉毛殿�
? cvFindNextContour,cvEndFindContour及𥽋曰�反
左皮斥尼弁玄及珂螹及丟乒伉�婖毛肮元卞允月仇午匹俴丹疶侔輥創
卞云仃月疶侔價菁弁仿旦


Wrap8 �廖喲堤憝杅及仿永皿
public ref class CvContourScanner
{
public:
static const int DEFAULT_HEADER_SIZE = sizeof( ::CvContour);

CvContourScanner(IplImage^ image,CvMemStorage^ storage,
int header_size, int mode, int method,CvPoint^ offset)
{
ptr_ =::cvStartFindContours(image->ptr_,storage->ptr_,
header_size,mode,method,*offset->ptr_);
}

static CvContourScanner^ cvStartFindContours(
IplImage^ image,CvMemStorage^ storage, int header_size,
int mode, int method,CvPoint^ offset)
{
return = gcnew CvContourScanner(image,storage,header_size,
mode,method,offset);
}

CvContour^ cvFindNextContour()
{
::CvContour* contour= reinterpret_cast< ::CvContour*>
( ::cvFindNextContour(this->ptr_) );
if(contour != nullptr)
{
return gcnew CvContour(contour);
}
else
{
return nullptr;
}
}

static CvContour^ cvFindNextContour(CvContourScanner^ scanner)
{
return scanner->cvFindNextContour();
}


CvContour^ cvEndFindContours()
{
pin_ptr< ::_CvContourScanner* > pp = &(this->ptr_);
::CvContour* ptr = reinterpret_cast< ::CvContour*>
(::cvEndFindContours(pp));
pp = nullptr; this->ptr_ = nullptr;
CvContour^ contour = gcnew CvContour();
contour->ptr_ = ptr;
return contour;
}

static CvContour^ cvEndFindContours(CvContourScanner^ scanner)
{
return scanner->cvEndFindContours();
}


~CvContourScanner()
{
this->!CvContourScanner();
}
!CvContourScanner()
{
if(!noalloc_)
{
if(this->ptr_ != nullptr)
{
pin_ptr< ::_CvContourScanner* > pp = &(this->ptr_);
::CvContour* contour = reinterpret_cast< ::CvContour*>
( ::cvEndFindContours(pp) );
::cvClearMemStorage(contour->storage);
this->ptr_ = nullptr;
}
}
}


Wrap8 �廖喲堤憝杅及仿永皿(C++/CLI)
private:
bool noalloc_;

internal:
_CvContourScanner* ptr_;
}

struct _CvContourScanner{};


Wrap8 �廖喲堤憝杅及仿永皿(C++/CLI)
public ref class CvContour
{
public:
CvContour(){ noalloc_ = false; this->ptr_ = nullptr; }

~CvContour() {this->!CvContour();}
!CvContour()
{
if(!noalloc_) { ::cvClearMemStorage(ptr_->storage); }
}
private:
bool noalloc_;
internal:
CvContour( ::CvContour* ptr)
{noalloc_ = true; this->ptr_ = ptr; }
::CvContour* ptr_;
};


�廖喲堤憝杅及仿永皿

? CvContourScanner互目永母白央奶伙卞隅膽互卅中及匹﹜
赻煦匹諾及�婖极毛釬傖允月﹝
(禾奶件正及扔奶朮互煦井木壬淏都卞�釬允月反內)
? CvContourScanner左皮斥尼弁玄反cvStartFindContours()匹釬傖仄﹜
cvEndFindContours()匹勹�允月
cvEnd‵毛網太咭木化手謎中方丹卞﹜犯奈正互勹�今木化中卅仃木
壬﹜
白央奶瓜仿奶扒匹網太堤允﹝
? �廖犯奈正及勹𠧧反cvEndFindContours()匹殿今木月左皮斥尼弁玄
(��廖及測桶卞)卞�仄化::cvClearMemStorage()毛網太堤允仇午
匹俴丹﹝(白央奶瓜仿奶扒匹網太堤允﹝)
? cvFindNextContour及𥽋曰�及�廖犯奈正反嶱溫仄化反中仃卅中及匹
cvFindNext‵匹反準勹𠧧戊件旦玄仿弁正﹜
cvEndFind‵匹反籵都及戊件旦玄仿弁正匹�廖左皮斥尼弁玄毛
釬傖允月(cvContour)

手丹珨隙灍俴仄化心月


�廖?撻倛鏡賒憝窣 (C++/CLI)
{
public:
// ‵‵謹‵‵
static void cvDrawContours(IplImage^ img, CvContour^ contour,
CvScalar^ external_color,CvScalar^ hole_color,
int max_level, int thickness ,int line_type, CvPoint^ offset)
{
::cvDrawContours(img->ptr_,reinterpret_cast<CvSeq*>
(contour->ptr_), *external_color->ptr_, *hole_color->ptr_,
max_level,thickness,line_type, *offset->ptr_);
}
static void cvRectangleR(IplImage^ img, CvRect^ r,
CvScalar^ color,int thickness, int line_type, int shift)
{
::cvRectangleR(img->ptr_,*r->ptr_,*color->ptr_,
thickness,line_type,shift);
}
};

適?灍俴戊奈玉 C#
class Program
{
static void Main(string[] args)
{
// ‵‵謹‵‵
CvMemStorage storage = new CvMemStorage(0);
CvContourScanner scanner = new CvContourScanner
(img2,storage,CvContourScanner.DEFAULT_HEADER_SIZE,
1,2,new CvPoint(0,0));

List<CvRect> list = new List<CvRect>();
CvContour scanningContour = null;


do
{
scanningContour = scanner.cvFindNextContour();
if (scanningContour!= null)
{
list.Add(scanningContour.rect);
}
}
while (scanningContour != null);

CvContour endContour = scanner.cvEndFindContours();
IplImage.cvDrawContours(img2,endContour,new CvScalar(64,64,64,64),
new CvScalar(255,255,255,255), 1,2,8, new CvPoint(0, 0));

GUI.cvWaitKey(0);


foreach(CvRect r in list)
{
IplImage.cvRectangleR(img2, r,
new CvScalar(128, 128,128,128), 2, 8, 0);
}

endContour.Dispose();
storage.Dispose();

GUI.cvWaitKey(0);

img2.Dispose();
GUI.cvDestroyWindow( "window" );
}
};


引午戶


引午戶

? 生奶氾奴皮左皮斥尼弁玄反禾奶件正匹奪燴仄
戊件旦玄仿弁正匹new,白央奶瓜仿奶扒匹delete允
月
? 禾奶件正脹及繞堤允月窒煦反internal卞仄化
俋窒井日�尹卅中方丹卞允月﹝
? 丟件田劐杅反皿伕由氾奴午仄化鼠嶱
? 母皮伙禾奶件正反pin_ptr匹失玉伊旦毛嘐隅
? char*?System.String脹反Marshal弁仿旦匹劐𡥼


引午戶
? 恚磁倰丟件田劐杅反﹜禾奶件正毛忳仃龰月戊件
旦玄仿弁正毛妏中﹜穴生奈斥玉倰(仿永由奈弁仿
旦)及皿伕由氾奴午仄化鼠嶱允月﹝
賤溫反笒互賤溫今木月岈匹俴歹木月及匹﹜
白央奶瓜仿奶扒匹嶱溫仄卅中方丹卞允月﹝
? 穴生奈斥玉左皮斥尼弁玄互秏𦦵允月午五
仿永皿仄凶生奶氾奴皮左皮斥尼弁玄手
賤溫(delete)仄化方中及井蛁砩仄﹜
? 方仁卅中�磁反﹜
戊件旦玄仿弁正匹白仿弘毛蕾化月卅升及源楊匹﹜
白央奶瓜仿奶扒匹及賤溫毛滅什


仍ラ�丐曰互午丹仍介中引仄凶


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