How does Otsu thresholding work?

Related questions

1. What happens when threshold is reached?
2. What is multilevel thresholding?
3. What is clipping in digital image processing?
4. What is gray level of an image?
5. What is watershed algorithm for image segmentation?
6. What are the image segmentation techniques?
7. What is region growing in image processing?
8. What is threshold limit value for h2s?
9. What is adaptive threshold?
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Tags

1. #calculating
2. #through
3. #background
4. #method
5. #foreground
6. #pixels
7. #possible
8. #measure
9. #thresholding
10. #pixel
11. #threshold
12. #spread
13. #levels
14. #iterating
15. #values
16. #involves
17. #explained
18. #either