How to test accuracy of segmentation algorithm?

Question

I am dealing with a image classification problem. Before classification, images should be segmented. I tried several methods. My question is \"how can i test accuracy of seg

Answer 1

I think multiple measures should be used when you want to evaluate your segmentation result. The accuracy ( the ratio of the correctly segmented area over the ground truth) is not enough. Because your segmentation may also cover the area that is not in the ground truth. So, I suggest you can use the following measures to evaluate your segmentation result:

1. True positive rate: the correctly segmentation area over all the area you segmented.
2. False positive rate: the area that is not in the ground truth but that is in your result over all the area you segmented.
3. Accuracy
4. F1 score: an integrated measure (please see: http://en.wikipedia.org/wiki/F1_score)