# \#coordinates

**URL:** https://forum.opencv.org/tag/coordinates/71.md

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## [solvePnP reprojection to image issue](https://forum.opencv.org/t/solvepnp-reprojection-to-image-issue/6954)

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**Author:** [@Qgel](https://forum.opencv.org/u/Qgel)\
**Replies:** 3\
**Last updated:** [January 4, 2022, 4:31pm UTC](https://forum.opencv.org/t/solvepnp-reprojection-to-image-issue/6954 "2022-01-04T16:31:01Z")

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Hello, I’m currently trying to estimate the head pose from an image using OpenCV in python. The image above shows the detected image points (blue) and a projection of the three coordinate axes (2.5 cm long) into the…