設置篩選參數，opencv

Question

我正在使用opencv 2.3實現篩選。

Sift implementation with OpenCV 2.2

#include <opencv2/core/core.hpp> 
#include <opencv2/features2d/features2d.hpp> 
#include <opencv2/highgui/highgui.hpp> 

#include <vector> 

using namespace std; 
using namespace cv; 

int main(int argc, char *argv[]) 
{   
    Mat image = imread("TestImage.jpg"); 

    // Create smart pointer for SIFT feature detector. 
    Ptr<FeatureDetector> featureDetector = FeatureDetector::create("SIFT"); 
    vector<KeyPoint> keypoints; 

    // Detect the keypoints 
    featureDetector->detect(image, keypoints); // NOTE: featureDetector is a pointer hence the '->'. 

    //Similarly, we create a smart pointer to the SIFT extractor. 
    Ptr<DescriptorExtractor> featureExtractor = DescriptorExtractor::create("SIFT"); 

    // Compute the 128 dimension SIFT descriptor at each keypoint. 
    // Each row in "descriptors" correspond to the SIFT descriptor for each keypoint 
    Mat descriptors; 
    featureExtractor->compute(image, keypoints, descriptors); 

    // If you would like to draw the detected keypoint just to check 
    Mat outputImage; 
    Scalar keypointColor = Scalar(255, 0, 0);  // Blue keypoints. 
    drawKeypoints(image, keypoints, outputImage, keypointColor, DrawMatchesFlags::DEFAULT); 

    namedWindow("Output"); 
    imshow("Output", outputImage); 

    char c = ' '; 
    while ((c = waitKey(0)) != 'q'); // Keep window there until user presses 'q' to quit. 

    return 0; 

} 

如何更改默認CommonParams，DetectorParams，DescriptorParams parametrs。

Answer 1

答案在OpenCV change keypoint or descriptor parameters after creation。相關片段：

featureDetector->set("someParam", someValue);