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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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Unable to remap retaining all black regions while using cv2.fisheye undistort

After generating the map1 and map2 using the cv2.fisheyeUndistortRectifyMap(), while remapping using cv2.UndistortRectifyMap(), I am unable to fetch the full black region even by keeping the Balance as 1. The expected image shall have all corners…
amar adak
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The functions distortPoints and undistortPoints are not inverse of each other

I am trying to understand the camera calibration/3D reconstruction and facing a strange behavior of cv::fisheye::distort/undistortPoints functions. I would expect that the fisheye model moves a point along the ray connecting it to the principal…
Vahagn
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Undistort a Fisheye Image using cv::fisheye::undistortImage

I am trying to undistort a fisheye image using OpenCV. I obtained the camera matrix and the distortion coefficients from the internal memory of the camera. I'm assuming them to be accurate. As you can see in the below code, I'm using…
csg
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fisheye distortion

I've found the code below written in java that places a fisheye effect on a buffered image. Is it possible to use this code on a different image format eg jpeg or bitmap? I've tried replacing the bufferedImage with bitmap and instead of using…
turtleboy
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How to project points from undistort image to distort image?

I undistorted the fisheye lens image with help of cv::fisheye::calibrate and found below coefficients. K = array([[541.11407173, 0. , 659.87320043], [ 0. , 541.28079025, 318.68920531], [ 0. , 0. , …
Jai
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2-D fisheye image to 3D hemisphere

I'm trying to dewarp a small part of fisheye image. My fisheye camera has 180 degrees FOV. I get an input fisheye image in form of round area inside of rectangle frame. My camera gives me an opportunity to get the radius of this circle and…
VideoProcessingResearcher
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Virtual PTZ camera via physical fisheye camera and Open CV

I'm trying to realize a virtual Pan-Tilt-Zoom (PTZ) camera, based on data from physical fisheye camera (180 degrees FOV). In my opinion I have to realize the next sequence. Get the coordinates of center of fisheye circle in coordinates of fisheye…
VideoProcessingResearcher
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D3 fisheye distortion issue for simple line chart

I am bit new to d3.js, looking to implement fish-eye/magnifier to the simple line chart, the problem am facing i do not see any change/movement in the chart when mouse is moved, what could be the problem with my code, could anyone please point me…
Praveen
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Conversion from dual fisheye coordinates to equirectangular coordinates

The following link suggests that we can convert dual fisheye coordinates to equirectangular coordinates using the following equations: // 2D fisheye to 3D vector phi = r * aperture / 2 theta = atan2(y, x) // 3D vector to…
chesschi
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How to use opencv.omnidir module for dewarping fisheye images

I am trying to use omnidirectional module for dewarping fisheye images in Python. I am trying to adapt this C++ tutorial in Python but running into issues. Here is my code: import numpy as np import cv2 import glob nx = 9 ny = 6 # termination…
Kunal Lad
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HTML , Jquery Fisheye menu

I have used the fisheye jquery "interface.js" I want to make make 3rd element with id="default" should be show default like mouse over effect , Please help me thanks in advance HTML
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Thirumalai murugan
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D3.js Can not add background image to rectangle

I'm implementing list of rectangles with d3.js fisheye and want to add a background image to each of rectangles. I'm trying following thing: svg.append("defs") .append("pattern") .attr("id", "bg") .append("image") …
nitoloz
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How to add FishEye distortion to UIImage using GPUImage or any other Lib?

I am using GPUImage for adding filters on UIImage. GPUImage does not contain fish eye distortion effect, I need shader code for fish eye distortion effect which could be used in GPUImage custom filter.
Waqar Ali
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OpenCV cannot find chessboard corners in fish-eye images

I am using OpenCV3.0 and VS2013 to do fisheye wide-angle(185 deg) camera calibration. There are some pictures that can work well, e.g: and the correction result is satisfying as: ![corrected image -- fish-eye][2] The result looks good, but I use a…
tzz
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OpenCV stitcher fails to stitch undistorted images

I am trying to stitch a panorama using mobile phone camera with an attachable 170 degree wide angle lens. The resulting photo is distorted (fisheye). I understand that to stitch these photos using Stitcher::stitch(InputArrayOfArrays images,…
Kevin
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