1. How Can I extract curved lines in the following image using Opencv?
2. How to extract only horizontal lines? inside -30 to +30 degrees
I need to detect horizontal lines from the following image including curved lines. I did like these steps. Color - Grayscale - GaussianBlur(to remove noise) - CannyEdge - HoughLineP But I get both of horizontal and vertical lines, and i cannot detect curved lines.
Please help, any Idea