  To guide surgical and medical treatment X-ray images have been used by
physicians in every modern healthcare organization and hospitals. Doctor's
evaluation process and disease identification in the area of skeletal system
can be performed in a faster and efficient way with the help of X-ray imaging
technique as they can depict bone structure painlessly. This paper presents an
efficient contrast enhancement technique using morphological operators which
will help to visualize important bone segments and soft tissues more clearly.
Top-hat and Bottom-hat transform are utilized to enhance the image where
gradient magnitude value is calculated for automatically selecting the
structuring element (SE) size. Experimental evaluation on different x-ray
imaging databases shows the effectiveness of our method which also produces
comparatively better output against some existing image enhancement techniques.
