Difference between revisions of "CTF"
From EosPedia
| Line 1: | Line 1: | ||
== CTF(Contrast Transfer Function) == | == CTF(Contrast Transfer Function) == | ||
Contrast Transfer Function is the defined function that by Wave-number Space (Reciprocal lattice Space) that represents how to transfer by observation the value (Complex number: and it has the intensity and phase) of each spatial resolution that the true image has. | Contrast Transfer Function is the defined function that by Wave-number Space (Reciprocal lattice Space) that represents how to transfer by observation the value (Complex number: and it has the intensity and phase) of each spatial resolution that the true image has. | ||
| + | |||
| + | == Example of affected Fourier image by CTF == | ||
| + | === Example1 === | ||
| + | <table> | ||
| + | <tr> | ||
| + | <td><p align="center">[[File:Input-1point.png]]<br> | ||
| + | true image<br></p> | ||
| + | </td> | ||
| + | <td><p align="center">-----><br> | ||
| + | FFT<br></p> | ||
| + | </td> | ||
| + | <td><p align="center">[[File:Input-1point-FFT.png]]<br> | ||
| + | true image(Fourier image)<br></p> | ||
| + | </td> | ||
| + | <td><p align="center">-----><br> | ||
| + | CTF<br></p> | ||
| + | </td> | ||
| + | <td><p align="center">[[File:Input-1point-CTF.png]]<br> | ||
| + | affected image by CTF<br></p> | ||
| + | </td> | ||
| + | </tr> | ||
| + | </table> | ||
| + | <br> | ||
| + | |||
| + | === Example2 === | ||
| + | <table> | ||
| + | <tr> | ||
| + | <td><p align="center">[[File:Input-grid.png]]<br> | ||
| + | true image<br></p> | ||
| + | </td> | ||
| + | <td><p align="center">-----><br> | ||
| + | FFT<br></p> | ||
| + | </td> | ||
| + | <td><p align="center">[[File:Input-grid-FFT.png]]<br> | ||
| + | true image(Fourier image)<br></p> | ||
| + | </td> | ||
| + | <td><p align="center">-----><br> | ||
| + | CTF<br></p> | ||
| + | </td> | ||
| + | <td><p align="center">[[File:Input-grid-CTF.png]]<br> | ||
| + | affected image by CTF<br></p> | ||
| + | </td> | ||
| + | </tr> | ||
| + | </table> | ||
| + | <br> | ||
| + | |||
| + | === Example3 === | ||
| + | <table> | ||
| + | <tr> | ||
| + | <td><p align="center">[[File:Input-B120.png]]<br> | ||
| + | true image<br></p> | ||
| + | </td> | ||
| + | <td><p align="center">-----><br> | ||
| + | FFT<br></p> | ||
| + | </td> | ||
| + | <td><p align="center">[[File:Input-B120-FFT.png]]<br> | ||
| + | true image(Fourier image)<br></p> | ||
| + | </td> | ||
| + | <td><p align="center">-----><br> | ||
| + | CTF<br></p> | ||
| + | </td> | ||
| + | <td><p align="center">[[File:Input-B120-CTF2-FFT.png]]<br> | ||
| + | affected image by CTF<br></p> | ||
| + | </td> | ||
| + | </tr> | ||
| + | </table> | ||
Latest revision as of 00:33, 10 October 2014
Contents
CTF(Contrast Transfer Function)
Contrast Transfer Function is the defined function that by Wave-number Space (Reciprocal lattice Space) that represents how to transfer by observation the value (Complex number: and it has the intensity and phase) of each spatial resolution that the true image has.
Example of affected Fourier image by CTF
Example1
|
-----> |
|
-----> |
|
Example2
|
-----> |
|
-----> |
|
Example3
|
-----> |
|
-----> |
|
