Dr. Bala, this is what NTA Information Bulletin states regarding correction of uploaded images. This is an excerpt from the Information Bulletin.

"Any correction pertaining to the photograph and signature of the candidate will be intimated through e-mail/SMS and the same will be available in the candidate’s login account. Rest of the fields like Father's name, Mother's name, Date of Birth, Category, Gender can be changed during the correction window".

So unless, intimated by NTA, any corrections in regards to uploaded images are not possible.