I have the next image.
I used the function connectedComponentsWithStats for find the components of the image. now i want draw only the components with an area > 3000, in this case there are 3 of the 5 components that the function found, i used the function "compare" for draw the 3 components but the result is not expected (only draw 1 component), Some idea for get the final result? thank you. my result is:
int main(int argc, const char** argv)
{
img = imread("blob.png", 0);
if (img.empty())
{
cout << "Could not read input image file: " << endl;
return -1;
}
namedWindow("Image", 1);
imshow("Image", img);
Mat labelImage(img.size(), CV_32S);
Mat stats, centroids;
int nLabels = connectedComponentsWithStats(img, labelImage, stats, centroids, 8, CV_32S);
std::vector colors(nLabels);
std::vector labels_finals;
colors[0] = Vec3b(0, 0, 0);//background
for (int label = 1; label < nLabels; ++label){ //label 0 is the background
if ((stats.at(label, CC_STAT_AREA)) > 3000){
labels_finals.push_back(label);
//cout << "hola" << endl;
}
cout << "area del component: " << label << "-> " << stats.at(label, CC_STAT_AREA) << endl;
//colors[label] = Vec3b((rand() & 255), (rand() & 255), (rand() & 255));
colors[label] = Vec3b(0, 255, 0);
}
Mat dst(img.size(), CV_8UC3);
for (int r = 0; r < dst.rows; ++r){
for (int c = 0; c < dst.cols; ++c){
int label = labelImage.at(r, c);
//cout << "label: " << label << endl;
Vec3b &pixel = dst.at(r, c);//accesa al elemento
pixel = colors[label];
}
}
Mat dst2(img.size(), CV_8UC3);
for (int i = 0; i < labels_finals.size(); ++i){
std::cout << "path i: " << labels_finals[i] << ' ' << endl;
compare(labelImage, labels_finals[i], dst2, CMP_EQ);
}
imshow("compare imagem ", dst2);
}
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