in the code imgradient3 and also in imgradient; Gazimuth = atan2(-Gy,Gx)*180/pi. My question is why this -Gy is used?

2 views (last 30 days)
Syed reza
Syed reza on 26 Feb 2017
My question has two parts. 1. When imgradient3 calculates Gazimuth, it uses the following equation Gazimuth = atan2(-Gy,Gx)*180/pi. Why -Gy is used instead of Gy in the equation? 2. How to get back of Gx, Gy, Gz values from Gmag, Gazimuth and Gelevation? When I was trying to get Gx, Gy, Gz values using simple geometry, I am getting everything right except an opposite sign for Gy.
Thanks in advance.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!