Giáo trình Xử lý ảnh (tiếng Anh) thầy Nguyễn Thanh Hải
University of Technology and Education
Faculty of Electrical & Electronic Engineering
Lecture:
IMAGE PROCESSING
Chapter 2:
Fundamentals
Nguyen Thanh Hai, PhD
2.1 Image Representation
- Gray-level images
or color images.
- The light intensity or brightness of an object shown at coordinates (x,y) of the image
- The maximum value on the range of gray level corresponding to a completely bright point and a point
with a gray level of zero is a completely
dark point
- The most popular ranges of gray level often used in typical images: 0 to 255, 0 to 511, 0 to 1023,
etc.
- The gray levels are almost always set to be nonnegative integer numbers (real numbers)
- This saves a lot of digital storage
spaces and significantly in processing
digital images
