建材做哪些网站好网站推广的100种方法

你想用什么样的图像？如果图像是一种简单的图像(例如白纸上的铅笔，普通墙上的标记)，您会考虑使用以下方法吗？我认为这是非常经典的方法，但在情况有限时效果很好 .

cv::Mat img = // your image.

double threshold = 128; // needs adjustment.

int n_erode_dilate = 1; // needs adjustment.

cv::Mat m = img.clone();

cv::cvtColor(m, m, CV_RGB2GRAY); // convert to glayscale image.

cv::blur(m, m, cv::Size(5,5));

cv::threshold(m, m, threshold, 255,CV_THRESH_BINARY_INV);

cv::erode(m, m, cv::Mat(),cv::Point(-1,-1),n_erode_dilate);

cv::dilate(m, m, cv::Mat(),cv::Point(-1,-1),n_erode_dilate);

std::vector< std::vector<:point> > contours;

std::vector<:point> points;

cv::findContours(m, contours, CV_RETR_LIST, CV_CHAIN_APPROX_NONE);

for (size_t i=0; i

for (size_t j = 0; j < contours[i].size(); j++) {

cv::Point p = contours[i][j];

points.push_back(p);

}

}

// And process the points or contours to pick up specified object.

// for example: draws rectangle on original image.

if(points.size() > 0){

cv::Rect brect = cv::boundingRect(cv::Mat(points).reshape(2));

cv::rectangle(img, brect.tl(), brect.br(), cv::Scalar(100, 100, 200), 2, CV_AA);

}