# \#fourier-mellin **URL:** https://forum.opencv.org/tag/fourier-mellin/323.md [Latest](https://forum.opencv.org/latest.md) · [Categories](https://forum.opencv.org/categories.md) · [Tags](https://forum.opencv.org/tags.md) --- ## [Circle Detection for Fourier-Mellin Shear Estimation](https://forum.opencv.org/t/circle-detection-for-fourier-mellin-shear-estimation/7674)
**Author:** [@der\_luftmensch](https://forum.opencv.org/u/der_luftmensch)\ **Replies:** 15\ **Last updated:** [February 23, 2022, 9:45pm UTC](https://forum.opencv.org/t/circle-detection-for-fourier-mellin-shear-estimation/7674 "2022-02-23T21:45:25Z")
I have the following cross-correlation image: This image is originally 0-1 floats. I need to detect the circle in the image, but I am having trouble doing so with cv::HoughCircles. Clearly, I’d prefer not to be force…