# Fisheye to equirectangular

**URL:** <https://forum.opencv.org/t/fisheye-to-equirectangular/18378>\
**Category:** Python\
**Created:** [July 30, 2024, 5:21pm UTC](https://forum.opencv.org/t/fisheye-to-equirectangular/18378 "2024-07-30T17:21:19Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![iegorval](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/iegorval/32/5818_2.png) [@iegorval](https://forum.opencv.org/u/iegorval)\
**Post date:** [July 30, 2024, 5:21pm UTC](https://forum.opencv.org/t/fisheye-to-equirectangular/18378/1 "2024-07-30T17:21:19Z")

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I have found multiple questions regarding fisheye → equirectangular conversion, in this and other forums. All answers proposed/explained how to implement it from scratch, mostly relying on Paul Bourke’s tutorial. As of 2024, is there really no built-in OpenCV functionality that performs this conversion in simple steps, without manual implementation? The documentation is still hell, unfortunately, and I cannot seem to find anything about it.

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**Author:** ![berak](https://avatars.discourse-cdn.com/v4/letter/b/85f322/32.png) [@berak](https://forum.opencv.org/u/berak)\
**Post date:** [July 31, 2024, 6:47am UTC](https://forum.opencv.org/t/fisheye-to-equirectangular/18378/2 "2024-07-31T06:47:09Z")

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sad as it is, you’re right -  
neither cube, nor fishmap transformation builtin here

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<div class="post-metadata">

**Author:** ![iegorval](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/iegorval/32/5818_2.png) [@iegorval](https://forum.opencv.org/u/iegorval)\
**Post date:** [July 31, 2024, 9:53pm UTC](https://forum.opencv.org/t/fisheye-to-equirectangular/18378/3 "2024-07-31T21:53:23Z")

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It is a shame, but thanks for confirmation.  
I failed miserably by trying to extend Paul Bourke’s ([Converting dual fisheye images into a spherical (equirectangular) projection](https://paulbourke.net/dome/dualfish2sphere/)) dual fisheye tutorial to map multiple fisheye frames into a 360deg spherical pano. Are you maybe aware of some resources or OpenCV implemented features that could guide me? Freely accessible resources on multiple fisheye (including rotation & translation between cameras) usage seems to be extremely limited and not beginner-friendly…