Lesson_2-2数字图像处理第二张(高教版).pdf

A Simple Image Formation Digital Image Fundamentals Model A Simple Image Formation Model Image Sampling and Quantization Some Basic Relationship Between Pixels Linear and Nonlinear Operations Monochrome Image 2D light intensity function f (x , y ) (x , y ) : spatial coordinates f (x , y ) : gray level (l) at (x , y ) l f x y i x y r x y Reflectance ( , ) ( , ) ( , ) i x y ∞ 0 ( , ) illumination r x y 0 ( , ) 1 L ≤l ≤L ⇒0 ≤l ≤L −1 min max Digital image acquisition process 2-2 2-3 Basic Concepts in Sampling and Quantization Image Sampling and Sampling Quantization Digitizing the coordinate values Quantization Digitizing the amplitude values 2-5