Ich verwende C++ und Opencv 2.3.1 für Hintergrundsubtraktion. Ich habe viele Male versucht, die Parameter von Mog2 zu ändern, um Schattenerkennungsfunktion zu deaktivieren, auch ich habe versucht, was andere Leute im Internet vorschlagen. Die Schattenerkennung ist jedoch weiterhin aktiviert.So deaktivieren Sie die Schattenerkennung in MoG2
können Sie mir bitte sagen, wie Sie es deaktivieren? siehe den Beispielcode und die generierte Maske.
//opencv
#include < opencv2/opencv.hpp>
#include < opencv2/core/core.hpp>
#include < opencv2/highgui/highgui.hpp>
#include < opencv2/video/background_segm.hpp>
#include < opencv2/imgproc/imgproc.hpp>
#include < opencv2/video/video.hpp>
//C
#include <stdio.h>
//C++
#include <iostream>
#include <sstream>
using namespace cv;
using namespace std;
// Global variables
Mat frame; //current frame
Mat fgMaskMOG2; //fg mask fg mask generated by MOG method
Ptr<BackgroundSubtractor> pMOG2; //MOG Background subtractor
int keyboard; //input from keyboard
//new variables
int history = 1250;
float varThreshold = 16;
bool bShadowDetection = true;
/*
//added to remove the shadow
unsigned char nShadowDetection = 0;
float fTau = 0.5;
//static const unsigned char nShadowDetection =(unsigned char)0;
*/
// Function Headers
void help();
void processImages(char* firstFrameFilename);
void help()
{
cout
<< "This program shows how to use background subtraction methods provided by " << endl
<< " OpenCV. You can process images (-img)." << endl
<< "Usage:" << endl
<< "./bs -img <image filename>}" << endl
<< "for example: ./bs -img /data/images/1.png" << endl
<< endl;
}
// morphological operation
void morphOps(Mat &thresh){
//create structuring element that will be used to "dilate" and "erode" image.
//the element chosen here is a 3px by 3px rectangle
Mat erodeElement = getStructuringElement(MORPH_RECT,Size(2,2)); //3x3
//dilate with larger element so make sure object is nicely visible
Mat dilateElement = getStructuringElement(MORPH_RECT,Size(1,1)); //8x8
erode(thresh,thresh,erodeElement);
erode(thresh,thresh,erodeElement);
dilate(thresh,thresh,dilateElement);
dilate(thresh,thresh,dilateElement);
}
// main function
int main(int argc, char* argv[])
{
//print help information
help();
//check for the input parameter correctness
if(argc != 3) {
cerr <<"Incorret input list" << endl;
cerr <<"exiting..." << endl;
return EXIT_FAILURE;
}
//create GUI windows
namedWindow("Frame");
namedWindow("FG Mask MOG2 ");
//create Background Subtractor objects
//pMOG2 = new BackgroundSubtractorMOG2();
pMOG2 = new BackgroundSubtractorMOG2(history, varThreshold, bShadowDetection);
//BackgroundSubtractorMOG2(int history, float varThreshold, bool bShadowDetection=1);
if(strcmp(argv[1], "-img") == 0) {
//input data coming from a sequence of images
processImages(argv[2]);
}
else {
//error in reading input parameters
cerr <<"Please, check the input parameters." << endl;
cerr <<"Exiting..." << endl;
return EXIT_FAILURE;
}
//destroy GUI windows
destroyAllWindows();
return EXIT_SUCCESS;
}
//function processImages
void processImages(char* fistFrameFilename) {
//read the first file of the sequence
frame = imread(fistFrameFilename);
if(frame.empty()){
//error in opening the first image
cerr << "Unable to open first image frame: " << fistFrameFilename << endl;
exit(EXIT_FAILURE);
//current image filename
string fn(fistFrameFilename);
//read input data. ESC or 'q' for quitting
while((char)keyboard != 'q' && (char)keyboard != 27){
//update the background model
pMOG2->operator()(frame, fgMaskMOG2,-1);
//get the frame number and write it on the current frame
size_t index = fn.find_last_of("/");
if(index == string::npos) {
index = fn.find_last_of("\\");
}
size_t index2 = fn.find_last_of(".");
string prefix = fn.substr(0,index+1);
string suffix = fn.substr(index2);
string frameNumberString = fn.substr(index+1, index2-index-1);
istringstream iss(frameNumberString);
int frameNumber = 0;
iss >> frameNumber;
rectangle(frame, cv::Point(10, 2), cv::Point(100,20),
cv::Scalar(255,255,255), -1);
putText(frame, frameNumberString.c_str(), cv::Point(15, 15),
FONT_HERSHEY_SIMPLEX, 0.5 , cv::Scalar(0,0,0));
//show the current frame and the fg masks
imshow("Frame", frame);
morphOps(fgMaskMOG2);
imshow("FG Mask MOG2 ", fgMaskMOG2);
//get the input from the keyboard
keyboard = waitKey(1);
//search for the next image in the sequence
ostringstream oss;
oss << (frameNumber + 1);
string nextFrameNumberString = oss.str();
string nextFrameFilename = prefix + nextFrameNumberString + suffix;
//read the next frame
frame = imread(nextFrameFilename);
if(frame.empty()){
//error in opening the next image in the sequence
cerr << "Unable to open image frame: " << nextFrameFilename << endl;
exit(EXIT_FAILURE);
}
//update the path of the current frame
fn.assign(nextFrameFilename);
// save subtracted images
string imageToSave =("output_MOG_" + frameNumberString + ".png");
bool saved = imwrite( "D:\\SO\\temp\\" +imageToSave,fgMaskMOG2);
if(!saved) {
cerr << "Unable to save " << imageToSave << endl;
}
}
}
Wenn i s tun o die Maske generiert einen 256 Graustufen Schatten werfen es deaktivieren, es sei denn, es gibt noch etwas zu ändern. – Zakarya
sind Sie bereit, Schatten (graue Fläche) zu entfernen. dann sollte dein Fragetitel nicht sein ", wie Schattendetektion zu deaktivieren" – sturkmen
ich redigierte die Antwort. OpenCV 3 hat eine Option zum Entfernen von Schatten. aber ich weiß übrigens nicht über 2.4 – sturkmen