CTF

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

true image

-----> FFT

true image(Fourier image)

-----> CTF

affected image by CTF

Example2

true image

-----> FFT

true image(Fourier image)

-----> CTF

affected image by CTF

Example3

true image

-----> FFT

true image(Fourier image)

-----> CTF

affected image by CTF