distortion

I'm unsing cv::undistort but it crops the image. I'd like to have all the undistorted image, so that the undistorted size is bigger then the original one, like this: I think I need to use cv::getOptimalNewCameraMatrix but I had no luck with my trials.. some help? Just for the record: You should use cv::getOptimalNewCameraMatrix and set the aplha parameter to 1. Aplha 0 only shows valid points on the image, alpha 1 shows all the original points as well as black regions. This code would do the trick: void loadUndistortedImage(std::string fileName, Mat & outputImage, Mat & cameraMatrix, Mat &

I would like to correct lens distortions on a series of images. All the images were captured with the camera fixed in place, and a checkerboard image from the same set up is also available. After detecting the corners of the distorted checkerboard image, I would like to compute the radial distortion coefficients so that I can correct the images. Similar to the estimateCameraParameters function. Ideally, I would like to use a method similar to Matlab camera calibration however this does not seem to work for cases where only a single calibration image is available (and the images were all

How could I make waving text on a canvas element similar to what is found on this page? EDIT : @Ben, forget about the downvotes for no reason on your question, and... BE MY GUEST! :) I never coded with <canvas> before, it was very fun. At this point, there is no bilinear interpolation. I might rework it and add more bells and whistles. If you want to achieve such an effect in javascript, you'll effectively have to use the <canvas> tag. The principle consists in precalculating a distortion function in a buffer that is larger than the source image dimension. Have a look at the old Flipcode Art

Have a look on following application http://itunes.apple.com/us/app/fatbooth/id372268904?mt=8 i think they are using the same feature provided my PhotoBooth MAC. Please suggest any api or any other possible solution so that I can build an iphone application Thanks Core Image (certainly used by Photo Booth on the Mac) is not a public API on the iPhone. To achieve something similar, you would have to use OpenGL and write your own shaders (or do something like OpenGL mesh distortion). 来源： https://stackoverflow.com/questions/3829395/need-photobooth-mac-feature-in-iphone-app