[Vim]用行号参与替换

一个小技巧。Vim有好处千种，”替换”只是其中一个。除了强大的正则表达式,\=也是一个好用的工具。比如要生成这么一个文件 This is number 1 This is number 2 This is number 3 This is number 4 This is number 5 This is number 6 This is number 7 This is number 8 This is number 9 This is number 10 方法当然有很多。用\=可以这么做: 先输入一行 This is number X 复制出另外9行 yy9p 得到 This is number […]

[OpenCV] detectMultiScale: output detection score

OpenCV provides quite decent implementation of the Viola-Jones Face detector. A quick example looks like this (OpenCV 2.4.5 tested): // File: main.cc #include using namespace cv; int main(int argc, char **argv) { CascadeClassifier cascade; const float scale_factor(1.2f); const int min_neighbors(3); if (cascade.load(“./lbpcascade_frontalface.xml”)) { for (int i = 1; i < argc; i++) { Mat img […]