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我想輸出一個藍色的手,但得到不正確的輸出。我在下面包含了輸入圖片,不正確的輸出圖片和代碼。OpenCV關閉一個形狀並填充它
我認爲下面的代碼不會填滿整個圖像,因爲圖像還沒有在右邊界處關閉。
如何關閉形狀並正確填充藍色?
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
using namespace cv;
using namespace std;
void drawStuff();
void showInputWindow();
void showCannyWindow();
void showContourWindow();
int thresh = 40;
int max_thresh = 120;
Mat img_rgb,img_gray,img_bw,canny_output,drawing;
int main(){
img_rgb = imread("qq.jpg");
blur(img_rgb, img_rgb, Size(3,3));
cvtColor(img_rgb,img_gray,CV_RGB2GRAY);
showInputWindow();
drawStuff();
cv::waitKey(0);
}
void drawStuff(){
vector<vector<Point> > contours;
vector<Vec4i> hierarchy;
Canny(img_gray, canny_output, thresh, thresh*2, 3);
cv::dilate(canny_output, canny_output, cv::Mat(), cv::Point(-1,-1));
showCannyWindow();
findContours(canny_output, contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, Point(0, 0));
drawing = Mat::zeros(canny_output.size(), CV_8UC3);
vector<Point> approxShape;
for(size_t i = 0; i < contours.size(); i++){
approxPolyDP(contours[i], approxShape, arcLength(Mat(contours[i]), true)*0.04, true);
drawContours(drawing, contours, i, Scalar(255, 0, 0), CV_FILLED); // fill BLUE
}
showContourWindow();
}
void showInputWindow(){
cv::namedWindow("InputImage");
cv::imshow("InputImage",img_rgb);
}
void showCannyWindow(){
cv::namedWindow("Canny");
cv::imshow("Canny",canny_output);
}
void showContourWindow(){
cv::namedWindow("Fill");
cv::imshow("Fill",drawing);
}
我認爲問題在於手裏有輪廓。嘗試一種反向方法 - 填充周圍環境,然後倒轉。 –
你如何填補周圍環境? –
僅使用一些不同的顏色(如綠色)繪製輪廓(未填充),然後使用cvFloodFill播種在左上角(coords 0,0)並用藍色填充。然後行走圖像,用藍色取代黑色和黑色或綠色像素的藍色像素。 –