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The CTRL-V Game!

Started by SlowPokemon, November 11, 2010, 03:29:08 PM

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BlackDragonSlayer

And the moral of the story: Quit while you're a head.

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Libera


LeviR.star

Check out my Youtube channel for remixes and original music! LeviR.star's Remixes

Also check out my piano arrangements here on my PA thread! LeviR.star's Arrangements

Maelstrom

3.6 – CTF Correction
Point spread function – PSF
-If you had a single point and imaged it, due to inherent issues, point is blurred, maybe surrounded by a halo
This function is true for each point before CTF isues
You can use stuff like gold beads which are single points and then are surrounded by halos and peaks
PSF is a Fourier transform of the CTF (and vice versa)
Remember, the Fourier transform of a gaussian function is another gaussian function
A broad G function because a narrow one, vice versa
A wave becomes a curve with bumps afterwards
PSF is identical for all points of high density in the image
--Called convolution
Image = Object (convolved with) PSF
Image = inverse fourier transform(Fourier transform of the object * CTF)
Here we go
Object = Inv F tfm ( F tfm (image)/CTF)
So, if the CTF is known, then math can be used to pull it back out
basically, take the FT of the image, divide by CTF, and then inverse FT and you will get the object
well, a closer version
Called CTF correction
Can't multiply by zero when CTF crosses axis
So, can just exclude those
Or, can "phase flip" elements that have a negative phase in the CTF
To do all this, you need to fully understand the CTF

Libera

Quote from: Maelstrom on April 21, 2021, 09:03:48 AMRemember, the Fourier transform of a gaussian function is another gaussian function

Wasn't expecting to read such important facts here.

mastersuperfan

Quote from: NocturneOfShadow on February 11, 2016, 03:00:36 PMthere's also a huge difference in quality between 2000 songs and 2010 songs
Quote from: Latios212 on February 11, 2016, 03:29:24 PMThe difference between 2000 songs and 2010 songs is 10 songs.

BlackDragonSlayer

Research Article Summary
And the moral of the story: Quit while you're a head.

Fakemon Dex
NSM Sprite Thread
Compositions
Story Thread
The Dread Somber

LeviR.star

Keratosis pilaris

(Turns out I have it. Good thing it's not dangerous)
Check out my Youtube channel for remixes and original music! LeviR.star's Remixes

Also check out my piano arrangements here on my PA thread! LeviR.star's Arrangements

IgosDuIkana

Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn

BlueKirby

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My MuseScore

play len'en and kid icarus uprising

Tobbeh99

Quote from: Dudeman on August 16, 2016, 06:11:42 AM
tfw you get schooled in English grammar by a guy whose first language is not English

10/10 tobbeh

BlackDragonSlayer

And the moral of the story: Quit while you're a head.

Fakemon Dex
NSM Sprite Thread
Compositions
Story Thread
The Dread Somber

LeviR.star

Check out my Youtube channel for remixes and original music! LeviR.star's Remixes

Also check out my piano arrangements here on my PA thread! LeviR.star's Arrangements

BlackDragonSlayer

And the moral of the story: Quit while you're a head.

Fakemon Dex
NSM Sprite Thread
Compositions
Story Thread
The Dread Somber

Jub3r7

It's dangerous to go alone, take me with you! [JUB has joined the party.]