Reviewer I:
We would like to thank Reviewer for helpful suggestions.
Comment 1: Abstract is weak. You should write quantitative results. You can write the best feature selection method.
Answer 1: Abstract is rewritten. Quantitative results and best feature selection method are given.
Comment 2: About previous work. Please write previous work done on CK+ database. Then you will use these methods to compare your results.
Answer 2: Previous work done on CK+ database is given in Table-2. And these methods are compared with our results.
Comment 3: At the end of the introduction, please write the aim of this paper and summarize your work.
Answer 3: The aim of this paper is given in at the end of the introduction.
Comment 4: For the short form of the SVM, write “Support Vector Machines (SVM)” in the first usage of it.
Answer 4: This is corrected.
Comment 5: Use dot instead of comma while showing your quantitative results. In English we write 89.5 instead of 89,5.
Answer 5: All commas are replaced with dots.
Comment 6: Write “landmark points” instead of “landmarks points”.
Answer 6: This is corrected.
Comment 7: In Table II, show other results produced on CK+ dataset in other papers. Then compare these results with your results and write a discussion on them.
Answer 7: The new comparison table includes other results produced on CK+ dataset in other papers and then a discussion about the comparison is given.
