Image processing : Image enhancement

IMAGE ENHANCEMENT IN
SPATIAL DOMAIN
Chapter 3 Gonzalez and Woods


Ms. Siddhi Naik

, Impart high quality knowledge and skills to students in the field of Information Technology , motivate research,
encourage industry consultancy projects and nurture human values and life skills.


WHAT IS IMAGE ENHANCEMENT?

•Image enhancement is the process of making images more suitabl
specific application
•Enhancement is subjective
•The reasons for doing this include:
• Highlighting interesting detail in images
• Removing noise from images
• Making images more visually appealing




Ms. Siddhi Naik

, Impart high quality knowledge and skills to students in the field of Information Technology , motivate research,
encourage industry consultancy projects and nurture human values and life skills.




ENHANCEMENT APPROACHES

• 2 broad categories:

• Spatial Domain:
refers to image plane itself and are based on direct manipulation
pixels

• Frequency Domain :
based on modifying the FT of an image



Ms. Siddhi Naik

, Impart high quality knowledge and skills to students in the field of Information Technology , motivate research,
encourage industry consultancy projects and nurture human values and life skills.


MATHEMATICAL BACKGROUND

• A mathematical representation of spatial domain enhancement:
g(x,y) = T [ f(x,y) ]

where f(x, y): the input image
g(x, y): the processed image
T: an operator on f, defined over some neighborhood




Ms. Siddhi Naik