int main()
{
// Detect corners and edges on image
cv::Mat image = cv::imread("opencv-corner-detection-sample.jpg", 0);
// Define object for detecting corners
MorphoFeatures morpho;
morpho.setThreshold(40);
// Get the edges
cv::Mat edges;
edges = morpho.getEdges(image);
imshow("Edges", edges);
cv::Mat corners;
corners = morpho.getCorners(image);
// Display the corner on the image
imshow("Corners on Image", corners);
// Draw corners
morpho.drawOnImage(corners, image);
imshow("Detected corners", image);
cv::waitKey(0);
return 0;
}
int main() {
cv::Mat image = cv::imread("building.jpg");
cv::namedWindow("Image");
cv::imshow("Image", image);
MorphoFeatures morpho;
morpho.setThreshold(40);
Mat edges;
edges = morpho.getEdges(image);
namedWindow("Hi");
imshow("Hi", edges);
cv::waitKey();
}
int main(){
Mat image=imread("/home/jiaqi/Pictures/images/building.jpg",0);
namedWindow("Image");
imshow("Image",image);
MorphoFeatures morpho;
morpho.setThreshold(40);
Mat edges;
edges=morpho.getEdges(image);
namedWindow("Edge Image");
imshow("Edge Image",edges);
morpho.setThreshold(-1);
Mat corners;
corners= morpho.getCorners(image);
morphologyEx(corners,corners,MORPH_TOPHAT,Mat());
cv::threshold(corners, corners, 40, 255, THRESH_BINARY_INV);
namedWindow("Corners");
imshow("Corners",corners);
morpho.drawOnImage(corners,image);
namedWindow("Corners on Image");
imshow("Corners on Image",image);
waitKey(0);
return 0;
}
void ImagePro::on_btnDetectEdgeMorph_clicked()
{
MorphoFeatures morpho;
morpho.setThreshold(40);
// Get the edges
cv::Mat tmpImg;
cv::cvtColor(_img, tmpImg, CV_RGB2GRAY);
cv::Mat edges;
edges= morpho.getEdges(tmpImg);
cv::namedWindow("edge dection: Morphology");
cv::imshow("edge dection: Morphology",edges);
cv::Mat corners;
corners= morpho.getCorners(tmpImg);
cv::Mat tmp2;
tmp2 = _img.clone();
morpho.drawOnImage(corners,tmpImg);
cv::namedWindow("corner dection: Morphology");
cv::imshow("corner dection: Morphology",tmpImg);
}
int main()
{
// Read input image
cv::Mat image= cv::imread(IMAGE_FOLDER "/building.jpg",0);
if (!image.data)
return 0;
// resize for book printing
cv::resize(image, image, cv::Size(), 0.7, 0.7);
// Display the image
cv::namedWindow("Image");
cv::imshow("Image",image);
// Create the morphological features instance
MorphoFeatures morpho;
morpho.setThreshold(40);
// Get the edges
cv::Mat edges;
edges= morpho.getEdges(image);
// Display the edge image
cv::namedWindow("Edge Image");
cv::imshow("Edge Image",edges);
// Get the corners
morpho.setThreshold(-1);
cv::Mat corners;
corners= morpho.getCorners(image);
cv::morphologyEx(corners,corners,cv::MORPH_TOPHAT,cv::Mat());
cv::threshold(corners, corners, 35, 255, cv::THRESH_BINARY_INV);
// Display the corner image
cv::namedWindow("Corner Image");
cv::imshow("Corner Image",corners);
// Display the corner on the image
morpho.drawOnImage(corners,image);
cv::namedWindow("Corners on Image");
cv::imshow("Corners on Image",image);
// Read and display image of square
image= cv::imread(IMAGE_FOLDER "/square.bmp",0);
cv::namedWindow("Square Image");
cv::imshow("Square Image",image);
// Creating the cross-shaped structuring element
cv::Mat cross(5,5,CV_8U,cv::Scalar(0));
for (int i=0; i<5; i++) {
cross.at<uchar>(2,i)= 1;
cross.at<uchar>(i,2)= 1;
}
// Dilate with a cross
cv::Mat result;
cv::dilate(image,result,cross);
// Display the result
cv::namedWindow("Dilated square with cross");
cv::imshow("Dilated square with cross",result);
// Creating the diamond-shaped structuring element
cv::Mat diamond(5,5,CV_8U,cv::Scalar(1));
diamond.at<uchar>(0,0)= 0;
diamond.at<uchar>(0,1)= 0;
diamond.at<uchar>(1,0)= 0;
diamond.at<uchar>(4,4)= 0;
diamond.at<uchar>(3,4)= 0;
diamond.at<uchar>(4,3)= 0;
diamond.at<uchar>(4,0)= 0;
diamond.at<uchar>(4,1)= 0;
diamond.at<uchar>(3,0)= 0;
diamond.at<uchar>(0,4)= 0;
diamond.at<uchar>(0,3)= 0;
diamond.at<uchar>(1,4)= 0;
// Erode with a diamond
cv::Mat result2;
cv::erode(result,result2,diamond);
// Display the result
cv::namedWindow("Eroded square with diamond");
cv::imshow("Eroded square with diamond",result2);
// Combine the images into one
cv::Mat final(100,300,CV_8U);
cv::Mat window= final(cv::Rect(0,0,100,100));
image.copyTo(window);
window= final(cv::Rect(100,0,100,100));
result.copyTo(window);
window= final(cv::Rect(200,0,100,100));
result2.copyTo(window);
// Display the combined result
cv::namedWindow("Combined");
cv::imshow("Combined",final);
// Save combined result
cv::imwrite("squares.bmp",final);
cv::waitKey();
return 0;
}
