函式功能规格說明
全域类别说明:
class CLostDetect{
private:
int nAlarmFlag ; //警告之flag
int nWidth, nHeight ; //Frame之宽高
int nAlarmTimer ; //警告时间
bool bEgdeDen ; //edge density的变数
bool bObjectSetted ; //侦测物是否设定
int nHdims ; //Histogram维度变数
float pHranges_arr[2] ; //Histogram范围大小
float *pHranges ;
CvRect cvRectObjectWinodw ; //设定选取对象之框的变量
CvHistogram *pRHist ; //计算R & G & B之histogram
CvHistogram *pGHist ;
CvHistogram *pBHist ;
IplImage *pCurFrame ; //input image
IplImage *pGray ; //color to gray
IplImage *pEdge ; //edge image
IplImage *pObjectImageModel ; //for rotate 0
IplImage *pObjectImageModel1 ; //for rotate 15 degree
IplImage *pObjectImageModelMinus1 ; //for rotate-15 degree
public:
CLostDetect(int width, int height, int alarmerTimer); //建构子
~CLostDetect(); //解构子
bool Reset() { bObjectSetted = false; return true;}; //把bObjectSetted设为false
bool SetImage(BYTE* pImageArray); //承接AP所传入的变量型态
bool SetImage(IplImage *pImage); //whole algorithm
bool SetObject(IplImage *pImage, int x, int y, int width, int height);
//设定object model
int GetObjectState(); //计算edge density
bool Alarm() {return (nAlarmFlag>nAlarmTimer); }; //send alarm message
};
成员函式说明:
CLostDetect::CLostDetect(int width, int height, int nSeconds=5){
Purpose: initial all variables we’ll use the program
Usage: set all variable will use.
Parameter:
|
Parameter |
Type |
Description |
|
width |
int |
the width of frame |
|
height |
int |
the height of frame |
|
nSeconds |
int |
alarm time set to 5 |
}
CLostDetect::~CLostDetect(){
Purpose: release variables
release all image variables
release both Hist variables
}
bool CLostDetect::SetImage(BYTE* pImageArray){
Purpose: Succeed to AP’s package to IplImage data type variable.
Usage: While webcam give image data into the program, check it data type.
Parameter:
|
Parameter |
Type |
Description |
| pImageArray | BYTE | Succeed input data type |
Return:
True, if success
False, otherwise
}
bool CLostDetect::SetImage(IplImage *pImage){
Purpose: detect whether the lost happened.
Usage: While AP given the right data type, starting the algorithm of detection
Parameter:
|
Parameter |
Type |
Description |
| PImage | IplImage | If the input data is not NULL, starting to go the process |
Return:
True, if success
False, otherwise
}
bool CLostDetect::SetObject(IplImage *pImage, int x, int y, int width, int height){
Purpose: set the object model.
Usage: given image frame, object position, width and height, return bool variable.
Parameter:
|
Parameter |
Type |
Description |
|
pImage |
IplImage |
input image variable |
|
x |
int |
Position of x |
|
y |
int |
Position of y |
|
width |
int |
Width of frame |
|
height |
int |
Height of frame |
Return:
True, if success
False, otherwise
}
int CLostDetect::GetObjectState(){
Purpose: After setting object model, quantify the object model edge density.
Usage: compute the edge density of object model.
Return:
0 when the procedure finished
}
测试程序及序列
测试程序: http://rg4.net/p/easyiv/liblostdetect_test.7z。测试程序快捷键：按r重新设定ROI检测区域，按p暂停处理，按t中止。
测试视频序列：http://rg4.net/p/easyiv/liblostdetect_sample.7z