Thank you for the question and photo. To correct this one option would be hair transplant. There are multiple techniques for performing hair transplant. Neograft is the preferred technique in our practice as it leaves no scar. Also another commonly performed technique is strip technique. It is best to consult a board certified plastic surgeon to determine what is best for you. Good luck.
You will want to consult with a hair restoration surgeon who specializes in hair line design. A great first step would be an online consultation. Often you can submit photos to top hair restoration surgeons for a complimentary evaluation. This should help lead you in the right direction. Having multiple consultations with different doctors cannot hurt.