distortion

Do any of you have an idea, how to distort an image in any quadrangle? I want to implement an image, which you can pull any corner in any direction, distorting the image. Anyone has an idea how to do that? I use and write stuff in android for a while now, but it does not seem like android has a function for that. I don't really feel like writing a new math library :). Greetings, Can Andrei Mankevich Looks like you need Canvas.drawBitmapMesh . There is a sample in Android SDK showing how to use it. You need to use Matrix for drawing your bitmap on Canvas . You can easily create such

OpenGL ES 2.0 has serious precision issues with texture sampling - I've seen topics with a similar problem , but I haven't seen a real solution to this "distorted OpenGL ES 2.0 texture" problem yet. This is not related to the texture's image format or OpenGL color buffers, it seems like it's a precision error. I don't know what specifically causes the precision to fail - it doesn't seem like it's just the size of geometry that causes this distortion, because simply scaling vertex position passed to the the vertex shader does not solve the issue. Here are some examples of the texture distortion

I've set up a very basic site with a #container div that includes the #navbar and #content. However, when I zoom in or out, the #navbar distorts, if I zoom in the links get pushed down below each other instead of being inline. If I zoom out, too much padding is added between the links. How can I stop this? HTML: <div id="navbar"> <ul> <li><a href="index.html">Home</a></li> <li><a href="top.html">Top</a></li> <li><strong><a href="free.html">FREE</a></strong></li> <li><a href="photo.html">Photo</a></li> <li><a href="about.html">About</a></li> <li><a href="contact.html">Contact Us</a></li> </ul>

I am trying to implement an application which uses shpere distortion filter. I am using an the algorithm from here which changes pixels location by getPixel() and setpixel() methods. My problem is it is too slow for Android devices and there are applications which implements same sphere(and others) filter way faster than my approach. ( for example Picsay Pro app) Could anyone share or give direction to find or implement fast distortion algorithms. Actual filter that implements the algorithm: public boolean sphereFilter(Bitmap b, boolean bSmoothing) { int nWidth = b.getWidth(); int nHeight = b

I'm trying to perform fisheye camera calibration via OpenCV 3.4.0 (C++, MS Windows). I used cv::fisheye::calibrate to make K and D (camera matrix and radial distortion coeffitients matrix). Then I used cv::fisheye::initUndistortRectifyMap to produce maps for X and Y coordinates. And finally I used cv::remap to undistort image from fisheye camera via maps from initUndistortRectifyMap. Everything looks right, but OpenCV dewarps only a central part of fisheye image. Edges are moved outside. I'd like to dewarp the whole image. I tried to change focal length in K matrix manually, and got