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Questions tagged [fisheye]

A Fisheye-effect is a distortion of images, such as that provided by a Fisheye lens, by which a wide-angle effect is achieved. If you are looking for information on Atlassian's Fisheye source code browser web app, please see atlassian-fisheye.

A Fisheye-effect is a distortion of images, such as that provided by a Fisheye lens, by which a wide-angle effect is achieved.

If you are looking for information on Atlassian's Fisheye source code browser web app, please see atlassian-fisheye.

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Issue using openCV to calibrate fish eye camera: problem with the function estimateNewCameraMatrixForUndistortRectify

I need to calibrate a fish eye camera. To do this I have checkerboard images for which I can detect corners. These cover most of the effective area where the images lie. I then used the python openCV library, and managed to get the intrinsic matrix…
Emmanuel Bernhard
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Opencv fisheye undistort without checker board approach

I am looking if there is any way we can identify the camera calibration matrix and others to undistort a fisheye image without the checkerboard approach in OpenCV. This is because my current setup doesn't allow me to take some sample pictures out of…
Akhil Korissery
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Fisheye camera calibration, when the Angle of incidence is greater than 75 degrees, the calculated pixel coordinates are out of the picture

The fisheye calibration results as follow: DIM=(570, 570) K=np.array([[266.36324787557334, 0.0, 286.1343601122261], [0.0, 265.62825365308095, 278.7737221129092], [0.0, 0.0, 1.0]]) D=np.array([[-0.0759953338456378], [0.021844363556585086],…
Yong
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z value is not available in fragment shader in WebGL?

I'm trying to apply OpenCV's fisheye projection model to this demo (source code is here) showing 3D cube using three.js developed by Giliam de Carpentier. the above demo is already applied fisheye-like effect, but I need a real fisheye projection…
Yudai
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Open cv stereo calibration with FOH 120°, getting "bad" rms

Open cv stereo calibration with FOH 120°, getting "bad" rms I'm currently working on a Project in which I have to calibrate a pair of cameras to rectify the images for a stream. For the calibration I'm using a chessboard pattern. I'm doing the…
Mike_el_mandarino
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Is there a way to load the calibration matrix into a video feed and get the correct calibrated output video?

I have calibrated the matrix and I am getting perfect calibrated image, but is there a way to do this with live video feed? Because every example in the web outputs an image but I want to know if it is possible to grab the video using VidCapture and…
Rune619
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Fisheye calibration/ Grid size necessary?

I want to calibrate a fisheye camera using https://docs.opencv.org/3.4/db/d58/group__calib3d__fisheye.html. This is done by capturing a grid from different perspectives and pass the grid information to the calibration function. Most resources if…
Mehno
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Fisheye Raycasting

I'm trying to build simple raycasting game. I'm rendering wall based on light length. Wall size is calculated based on natural log formula. Problem is fisheye! I tries cos formula but it's not applicable to my architecture. Here's the code: void …
deliriumgrim
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fisheyestereocalibration opencv 4.5.5 crashes

i’m desperatly trying to get my fisheye stereo camera working. I've got 2 210° cameras. So far i’ve tried this code, it doesn’t work with his or mine images. Whatever i do, it always crashes at cv::fisheye::stereoCalibrate with the error:…
embarto
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What distortion model opencv uses for fisheye calibration?

Despite reading here and other places online, I'm still not completely sure about the model. A follow up question, is it possible to use a different distortion model on opencv? I'm using 4.1.2.30 version. Thanks for any help!
yonatan
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Stitch 360 fisheye video with FFmpeg

I have dual-fisheye MP4 files generated from a Rylo camera. Using FFmpeg on Windows, I want to convert the video into equirectangular format. The command I have been trying is: ffmpeg -t 5 -i input.mp4 -vf v360=dfisheye:e:ih_fov=208:iv_fov=208 -y…
Ben
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LibVLC: Is a filter like v360:fisheye from ffmpeg available in LibVLC?

I'm having problem playing fisheye(180) videos panoramically on the fly using LibVlcSharp in a WinForms appliction. More specifically: what I want to do is filtering video with libvlcsharp in a WinForms application(c#) with the same effect like -vf…
Craab
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How do I use cv2.fisheye.undistortPoints to convert a point in distorted space to one in undistorted space?

I am trying to map features from undistorted space back to distorted space with the opencv fisheye functions. I can successfully transform my image from the camera distorted fisheye image to regular space via this code: DIM = (953, 720) K =…
Kyle
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opencv undistortPoints doesn't undistort

I have a camera with a fish-eye lens. I successfully undistort my image, but I want to undistort point coordinates. I know the maps contain src image coordinates for each pixel in dst so I cannot directly use those without some iterative algoritm. I…
elechris
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Sampling perspective (sub)views from fisheye image

I have a problem trying to select virtual subimages (lets call them ROIs) in a fisheye image which then I want to undistort. I have the fisheye calibration parameters following. Scaramuzza calibration model. What I would like to do is creating an…
ElPotac
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