opencv圖片全景拼接詳解
簡介
基本的拼接方式參見: 《opencv實現影象的拼接功能》
本博文基於取景模式講解影象拼接。API全面基本的介紹介紹參見:
opencv官網:http://docs.opencv.org/modules/stitching/doc/stitching.html
在opencv原始碼中stitching.cpp 是簡單版影象拼接例項,參見《opencv實現影象的拼接功能》。
stitching_detailed.cpp 複雜全面版影象拼接例項。
簡單例項(stitching.cpp)
首先看下,opencv實現影象拼接的最簡單例項,這是將stitching.cpp裁剪到最簡單的程式碼
#include <iostream>
#include <fstream>
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/stitching/stitcher.hpp"
using namespace std;
using namespace cv;
bool try_use_gpu = true; //false;
vector<Mat> imgs;
string result_name = "result.jpg";
int parseCmdArgs(int argc, char** argv)
{
for (int i = 1; i < argc; ++i){
Mat img = imread(argv[i]);
if (img.empty()){
cout << "Can't read image '" << argv[i] << "'\n";
return -1;
}
imgs.push_back(img);
imshow(argv[i], img);
}
return 0;
}
int main(int argc, char* argv[])
{
int retval = parseCmdArgs(argc, argv);
if (retval) return -1;
Mat pano;
Stitcher stitcher = Stitcher::createDefault(try_use_gpu);
Stitcher::Status status = stitcher.stitch(imgs, pano);
if (status != Stitcher::OK)
{
cout << "Can't stitch images, error code = " << int(status) << endl;
return -1;
}
imwrite(result_name, pano);
imshow("show", pano);
cv::waitKey(0);
return 0;
}
效果演示
基於不同模式的全景拼接(stitching_detailed.cpp精簡版)
程式碼具體程式碼如下:
#include <iostream>
#include <fstream>
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/stitching/stitcher.hpp"
using namespace std;
using namespace cv;
bool try_use_gpu = false;
vector<Mat> imgs;
string result_name = "result.jpg";
int parseCmdArgs(int argc, char** argv)
{ //輸入的圖片全部填充到容器imgs中,並將輸入的圖片顯示出來。
for (int i = 1; i < argc-1; ++i)
{
Mat img = imread(argv[i]);
if (img.empty()){
cout << "Can't read image '" << argv[i] << "'\n";
return -1;
}
imgs.push_back(img);
imshow(argv[i], img);
}
return 0;
}
int main(int argc, char* argv[])
{
int retval = parseCmdArgs(argc, argv);
if (retval) return -1;
Mat pano;
Stitcher stitcher = Stitcher::createDefault(try_use_gpu); //建立一個stitcher物件。
if(argv[4][0] == '1')
{ //1:平面拼接
PlaneWarper* cw = new PlaneWarper();
stitcher.setWarper(cw);
}
else if(argv[4][0] == '2')
{//2:柱面 拼接
SphericalWarper* cw = new SphericalWarper();
stitcher.setWarper(cw);
}
else if(argv[4][0] == '3')
{//3:立體畫面拼接
StereographicWarper *cw = new cv::StereographicWarper();
stitcher.setWarper(cw);
}
//使用Surf演算法來尋找特徵點,支援Surf和Orb兩種方式
detail::SurfFeaturesFinder *featureFinder = new detail::SurfFeaturesFinder();
stitcher.setFeaturesFinder(featureFinder);
/*匹配給定的影象和估計相機的旋轉*/
Stitcher::Status status = stitcher.estimateTransform(imgs);
//另一種方式來實現拼接
if (status != Stitcher::OK)
{
cout << "Can't stitch images, error code = " << int(status) << endl;
return -1;
}
/*生成全景影象*/
status = stitcher.composePanorama(pano);
if (status != Stitcher::OK)
{
cout << "Can't stitch images, error code = " << int(status) << endl;
return -1;
}
imwrite(result_name, pano);
imshow("show", pano);
cv::waitKey(0);
return 0;
}
程式碼中設定生成結果圖為:1:平面, 2:柱面, 3:立體畫面。在它提供的複雜版例項:stitching_detailed.cpp,
有如下種類可以選擇:
plane|cylindrical|spherical|fisheye|stereographic|compressedPlaneA2B1|
compressedPlaneA1.5B1|compressedPlanePortraitA2B1|compressedPlanePortraitA1.5B1|paniniA2B1|
paniniA1.5B1|paniniPortraitA2B1|paniniPortraitA1.5B1|mercator|transverseMercator
本例中結果展示:
1:平面
2:柱面
3:立體畫面