Horizon detection algorithm [closed]

Question

Can you help me find any information on how to detect horizon on image?
It should not be based on genetic algorithm or neural network.

Answer 1

Just found this question interesting, so I searched the internet for you and came up with following papers/links, the first one perhaps being the most interesting, as it provides a concrete algorithm.

1. Towards Flight Autonomy: Vision-Based Horizon Detection for Micro Air Vehicles (PDF at citeseer)
2. Attitude Estimation for a Fixed-Wing Aircraft Using Horizon Detection and Optical Flow (PDF)

Following the citations in the papers you will get to more resources on research in this field.

Answer 2

I'm not sure does this works. But my first approach would be - to detect most frequent line by using Hough transform with such properties:

• line should extend up to image boundaries.
• line divides image into two regions such that in one of them standard deviation of color is small.