Transcript Range from Focus

Range from Focus
Based on the work of Eric Krotkov
And Jean Paul Martin
Problem statement
Problem statement cont.
Theory of Defocus
The Optical Transfer Function
Wave Aberation
The Object plane, the image plane
and the pupil planes
The Wave aberation QQ
A different choice of reference
system for wave aberation
Notation
The displacement of the detector
plane is = to introduction of wave
aberation by amount
In terms of the amount of defocus
Figure 2. Cross-section of the OTF
of a defocused incoherent system
Focus Quality
Focus criterion functions
Focus criterion functions cont.
Implementation
Search Strategy
Fibonacci search technique
The search Algorithm
Computing the range
Thin lens geometry
Computing the range
Algorithm
Limitations
The effect of depth of field
Focus data
Range errors