radial | 易学教程

Animate a Canvas circle to draw on load

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问题 OK Hello. I've decided to start using HTML canvas for a small project I have. There's no real start yet. I'm just learning the basics of Canvas and I want to Animate a circle <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>title</title> <style> body { margin: 0px; padding: 0px; background: #222; } </style> <link rel="stylesheet" href="style.css" type="text/css"> </head> <body> <canvas id="myCanvas" width="578" height="250"></canvas> <script> var canvas = document.getElementById(

Animate a Canvas circle to draw on load

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radial gradients in CSS3 [closed]

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问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago . I have some experience making linear gradients in CSS but I would really like to make a radial gradient similar to this image http://i.stack.imgur.com/T85xO.png Basically a light grey radial positioned at the bottom of the element 回答1: Radial gradients are in an implementation

How to remove radial distortions from images using OpenCV?

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问题 I think I should be using cv::remap to remove the distortion but can't figure out what the the maps const Mat& map1, const Mat& map2 to should be to achieve this. Should I be using the cv::initUndistortRectifyMap to find out the values? If so, I'd really appreciate an example. I do not have the intrinsic camera parameters or don't know how to calculate them. Thanks. 回答1: If you are looking to remove the distortion caused by the camera lens you should take a look at this answer I wrote some

How to create a circular plot showing monthly presence or absence using radial.plot / ggplot2

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问题 I want to create a figure (similar looking to the attached) in ggplot2 that is circular with month of year represented on axis so twelve tick marks around the circumference, with one inner arc of a certain color corresponding to months where pa = 1 (the other options is pa = 0) and another inner arc (outside of the first arc) corresponding to sampled = 1 (other option is sampled = 0). Data looks like this: m season pa month sampled occupancy 1 spring 1 3 1 present 2 spring 1 4 1 present 3

radial gradients in CSS3 [closed]

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Closed . This question needs to be more focused . It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post . Closed 2 years ago . I have some experience making linear gradients in CSS but I would really like to make a radial gradient similar to this image http://i.stack.imgur.com/T85xO.png Basically a light grey radial positioned at the bottom of the element Radial gradients are in an implementation mess right now, Safari doesn't support elliptical radial backgrounds (Webkit Nightly does, so support for

Android radial gradient

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问题 I've got following drawable set as LinearLayout background: <?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item> <bitmap android:tileMode="repeat" android:dither="true" android:src="@drawable/bg"/> </item> <item> <shape android:shape="rectangle"> <gradient android:startColor="#ffff0000" android:endColor="#ff00ff00" android:centerX="50%" android:centerY="50%" android:gradientRadius="50%" android:type="radial"/> </shape> </item> <

How to create a circular plot showing monthly presence or absence using radial.plot / ggplot2

阅读更多关于 How to create a circular plot showing monthly presence or absence using radial.plot / ggplot2

I want to create a figure (similar looking to the attached) in ggplot2 that is circular with month of year represented on axis so twelve tick marks around the circumference, with one inner arc of a certain color corresponding to months where pa = 1 (the other options is pa = 0) and another inner arc (outside of the first arc) corresponding to sampled = 1 (other option is sampled = 0). Data looks like this: m season pa month sampled occupancy 1 spring 1 3 1 present 2 spring 1 4 1 present 3 spring 1 5 1 present 4 summer 1 6 1 present 5 summer 1 7 1 present 6 summer 1 8 1 present 7 winter 0 12 1

Android radial gradient

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I've got following drawable set as LinearLayout background: <?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item> <bitmap android:tileMode="repeat" android:dither="true" android:src="@drawable/bg"/> </item> <item> <shape android:shape="rectangle"> <gradient android:startColor="#ffff0000" android:endColor="#ff00ff00" android:centerX="50%" android:centerY="50%" android:gradientRadius="50%" android:type="radial"/> </shape> </item> </layer-list> According to the docs , gradientRadius can be set to percentage of window/parent size.

How to remove radial distortions from images using OpenCV?

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I think I should be using cv::remap to remove the distortion but can't figure out what the the maps const Mat& map1, const Mat& map2 to should be to achieve this. Should I be using the cv::initUndistortRectifyMap to find out the values? If so, I'd really appreciate an example. I do not have the intrinsic camera parameters or don't know how to calculate them. Thanks. karlphillip If you are looking to remove the distortion caused by the camera lens you should take a look at this answer I wrote some time ago, which has intructions and references on how to do proper camera calibration. I also