Fiber Segmentation in concrete image

I am new to image processing and trying to segment fiber (white streaks and dots) from the concrete sample images. I am using MATLAB, I have tried some techniques but it seems that techniques it not accurate.

1. How to segment fiber from the image?
2. How to calculate the percentage of fiber in the image?
3. Orientation of fiber?

I would really appreciate your help with correct code.

Thanks.

Answer 1

[Tarunbir Gambhir]

I suggest you go through the documentation page on regionprops. I beleive properties like Area, BoundingBox, Centroid, and Orientation might be helpful here.