{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

e178-04L5 - Sampling and Quantization Lecture#5 Sampling...

Info icon This preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Sampling and Quantization Lecture #5 January 20, 2004
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Jan 20, 2004 Sampling 2 Sampling and Quantization ° Spatial Resolution (Sampling) ± Determines the smallest perceivable image detail. ± What is the best sampling rate? ° Gray-level resolution (Quantization) ± Smallest discernible change in the gray level value. ± Is there an optimal quantizer?
Image of page 2
Jan 20, 2004 Sampling 3 Image sampling and quantization In 2-D f(x,y) (Continuous image) Sampler f s (m,n) Quantizer u(m,n) To Computer
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Jan 20, 2004 Sampling 4 1-D 1− D x(t) Time domain X(u) Frequency T s(t) x s (t) = x(t) s(t) = Σ x(kt) δ (t-kT) s(t) 1/T 1/T X s (f)
Image of page 4
Jan 20, 2004 Sampling 5 2-D: Comb function y comb(x,y; x ,∆ y ) x x y Comb( , ; , ) ( , ) x y x y x m x y n y n m =−∞ =−∞ δ
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Jan 20, 2004 Sampling 6 Sampled Image f x y f x y x y x y f m x n y x m x y n y x y x y u v x y u v x y s n m ( , ) ( , ) ( , ; , ) ( , ) ( , ) ( , ; , ) ( , ) , ; , ) = = ← → = =−∞ =−∞ comb comb COMB comb( ∆ ∆ δ 1 1 1
Image of page 6
Jan 20, 2004 Sampling 7
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern