pts

opencv-python选择ROI 矩形选择框 import cv2 import imutils img = cv2.imread("./test_image.jpg") img = imutils.resize(img, width=500) roi = cv2.selectROI(windowName="roi", img=img, showCrosshair=True, fromCenter=False) x, y, w, h = roi cv2.rectangle(img=img, pt1=(x, y), pt2=(x + w, y + h), color=(0, 0, 255), thickness=2) cv2.imshow("roi", img) cv2.waitKey(0) cv2.destroyAllWindows() 多边形选择框，主要利用鼠标交互进行绘制： 单击左键，选择多边形的点； 单击右键，删除最近一次选择的点； 单击中键，确定ROI区域并可视化。 按”S“键，将多边形ROI区域的点保存到本地”config.pkl"文件中。 import cv2 import imutils import numpy as np import joblib pts = [] # 用于存放点 # 统一的：mouse callback function def draw

CSI 403 Data Structures and Algorithms Fall 2019 Homework IV Hurd Problem 1 [25 pts]: Given the sequence of numbers: 20, 7, 34, 29, 43, 40, 8, 12, 30, 42 a) [7 pts] Show the resulting BST after inserting the numbers as keys. b) [9 pts] What will be the resulting tree if you delete the root? Show the tree and explain the steps taken in deleting the root according to the delete procedure we discussed in class. c) [9 pts] Can you reorder the original sequence of numbers to obtain a tree of a smaller height? If, yes, show the permutation of the sequence and the new tree. If no, argue why a smaller

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm implementing a math library in C++. The library will be compiled to a DLL so those who use it will only need the header files the classes' definitions. The users of my classes will be people who are new to the language. However, there are some objects that might be referenced in several parts of their programs. Since I don't expect them to do the memory management, I'd like to do it myself. Therefore, I have to implement reference counting (garbage collection is not a possibility). I want to make that reference counting as transparent as

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: What's the algorithm for computing a least squares plane in (x, y, z) space, given a set of 3D data points? In other words, if I had a bunch of points like (1, 2, 3), (4, 5, 6), (7, 8, 9), etc., how would one go about calculating the best fit plane f(x, y) = ax + by + c? What's the algorithm for getting a, b, and c out of a set of 3D points? 回答1: If you have n data points (x[i], y[i], z[i]), compute the 3x3 symmetric matrix A whose entries are: sum_i x [ i ]* x [ i ], sum_i x [ i ]* y [ i ], sum_i x [ i ] sum_i x [ i ]* y [ i ],

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 选择语言 中文(简体) 日语 英语 中文(繁体) 由 翻译 强力驱动 问题: I'm trying to get the volume of the convex hull of a set of points using the SciPy wrapper for QHull . According to the documentation of QHull , I should be passing the "FA" option to get the total surface area and volume. Here is what I get.. What am I doing wrong? > pts [( 494.0 , 95.0 , 0.0 ), ( 494.0 , 95.0 , 1.0 ) ... ( 494.0 , 100.0 , 4.0 ), ( 494.0 , 100.0 , 5.0 )] > hull = spatial . ConvexHull ( pts , qhull_options = "FA" ) > dir ( hull ) [ '__class__' , '__del__' , '__delattr__' , '__dict__' , '_

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to run the sshpass tool to automate an sftp action. On another server, the command works, but on this server it just returns one line of error mesage. Here is the command I am using: sshpass -p Password sftp Uname@Host And I get the error: Failed to get a pseudo terminal: Success I've tried it with lots of different hosts and as the root user, and I can sftp in without a problem so I am pretty sure it is either a sshpass or pseudo terminal issue. I don't know a whole lot about pseudo terminals and can't seem to find anything on

进入Tomcat的bin目录，执行语句：ps -ef|grep tomcat 输出如下，则Tomcat启动了。 [ tomcat@erp ][ /export/ home / tomcat / Apache / apache - tomcat - 7.0 . 77 / bin ]> ps - ef | grep tomcat tomcat 3984 1 0 01 : 41 : 26 ? 1 : 37 / oraprodbk1 / tomcat / Apache / jdk1 . 6.0 / jre / bin / java - Djava . util . logging . config . file tomcat 25358 25357 0 08 : 47 : 56 ? 0 : 00 / usr / lib / ssh / sshd tomcat 25587 25380 0 08 : 49 : 28 pts / 1 0 : 00 grep tomcat tomcat 25586 25380 0 08 : 49 : 28 pts / 1 0 : 00 ps - ef tomcat 25380 25358 0 08 : 48 : 03 pts / 1 0 : 00 - bash 输入如下，则Tomcat没有启动。 [ tomcat@bggjghApp apache - tomcat