电子科发女学光电科学与工程学院 SCHOOL OF OPTOELECTRONIC SCIENCE AND ENGINEERING OF UESTC 4.Measuring Image Information Shannon's first theorem: n->oo ● Lave.is the average number of code symbols required to represent all n symbol groups. Lave.n can be made arbitrarily close to H by encoding infinitely long extensions of the single-symbol source.4. Measuring Image Information Shannon’s first theorem: , lim[ ] H avg n n L  n   Lavg,n is the average number of code symbols required to represent all n symbol groups.  Lavg,n/n can be made arbitrarily close to H by encoding infinitely long extensions of the single-symbol source