contour

I have a problem to get my head around smoothing and sampling contours in OpenCV (C++ API). Lets say I have got sequence of points retrieved from cv::findContours (for instance applied on this this image: Ultimately, I want To smooth a sequence of points using different kernels. To resize the sequence using different types of interpolations. After smoothing, I hope to have a result like : I also considered drawing my contour in a cv::Mat , filtering the Mat (using blur or morphological operations) and re-finding the contours, but is slow and suboptimal. So, ideally, I could do the job using

How can I sort contours by the size of their contour areas? And how can I get the biggest/smallest one? dom You can use std::sort with a custom comparison function object // comparison function object bool compareContourAreas ( std::vector<cv::Point> contour1, std::vector<cv::Point> contour2 ) { double i = fabs( contourArea(cv::Mat(contour1)) ); double j = fabs( contourArea(cv::Mat(contour2)) ); return ( i < j ); } Usage: [...] // find contours std::vector<std::vector<cv::Point> > contours; std::vector<cv::Vec4i> hierarchy; cv::findContours( binary_image, contours, hierarchy, CV_RETR_EXTERNAL,

I'd like to know what would be the best strategy to compare a group of contours, in fact are edges resulting of a canny edges detection, from two pictures, in order to know which pair is more alike. I have this image: http://i55.tinypic.com/10fe1y8.jpg And I would like to know how can I calculate which one of these fits best to it: http://i56.tinypic.com/zmxd13.jpg (it should be the one on the right) Is there anyway to compare the contours as a whole? I can easily rotate the images but I don't know what functions to use in order to calculate that the reference image on the right is the best

When using matplotlib with a contour plot, I'm having trouble getting the colorbar to display as I want. I've read through numerous similar examples, but have still not been able to get what I want. In the image below, I want two things changed. I want the minimum value and maximum values to be display on the color bar (the max should be 2.0 and the min -0.1). These two values should be at the very edge of the colorbar. Also, I want the colorbar to display the value at every color transition. For example. in the plot below, between 2.1 and 1.8, there is another color transition where the value

作者| 禅鸣、忠源、天元、进超、元毅 业界要闻 Helm 官方推荐用户迁移到 V3 版本 Helm 官方发布 博客 ，指导用户从 v2 迁移到 v3，这标志着官方开始正式推进 helm 从 v2 转向 v3。我们也更加推荐终端用户使用 helm v3，之前我们曾在文章 《 初探云原生应用管理（二）: 为什么你必须尽快转向 Helm v3》 深入探讨过如何用 Helm 来快速部署 K8s 应用以及为什么要尽快转向 Helm V3。 CNCF 公布 2020 年 KubeCon 时间表 CNCF 最近公布了其 2020 年 KubeCon + CloudNativeCon 的时间表： 欧洲：2020 年 3 月 30 日至 4 月 2 日，阿姆斯特丹 中国：2020 年 7 月 28 至 30 日，上海 北美：2020 年 11 月 17 至 20 日，波士顿 最近一场，北美地区 KubeCon + CloudNativeCon 将在 11 月 18 日至 21 日在圣地亚哥举行。 Contour v0.15 发布 在 Contour (Heptio 开源项目，提供 Envoy 作为 Kubernetes 项目的 Ingress Controller) 的早期版本中，改进了拆分部署模型，以确保 Envoy 和 Contour 之间的通信。 现在，通过我们的最新版本 Contour v0

I want to draw a contour plot for 3D data. I have a force in x,y,z directions I want to plot the contour3 for that the dimensions of the Fx = 21x21X21 same for Fy and Fz I am finding force = f*vector(x,y,z) Then Fx(x,y,z) = force(1) Fy(x,y,z) = force(2) Fz(x,y,z) = force(3) I did the following but it is not working with me ?? why and how can I plot that FS = sqrt(Fx.^2 + Fy.^2 + Fz.^2); x = -10:1:10; [X,Y] = meshgrid(x); for i=1:length(FS) for j = 1:length(FS) for k=1:length(FS) contour3(X,Y,FS(i,j,k),10) hold on end end end This is the error I am getting Error using contour3 (line 129) When Z