FFT / IFFT Effect

[ArgusMagnus]

Download: https://forums.getpaint.net/topic/32337-argusmagnus-plugin-pack-20181019/

(Copy the file "ArgusPDN.FFTEffects.dll" to the "paint.net/Effects" folder)

 

 

This Plugin contains 4 effects related to Fast Fourier Transform and Signal Processing in the Frequency Domain:

 

1. Transform->Fast Fourier Transform: Transforms either intensity image or one of the channels (R,G,B ) to and from the frequency domain. The transformed image contains the magnitude information in the R and G values and the phase information in the B value (which basically means: don't change the B value of any pixel too much are at all if you want to get a meaningful result when transforming back).

If you want to get a meaninful result when transforming back, there are two limitations: 1. Don’t change the B component (the phase information is important), 2. Non-rectangular Selections won’t work.

 

2. Signal Processing->Low Pass Filter: The same as using the transform effect, removing (setting to black or transparent) all pixel outside a rectangle around the center and transforming back only this is faster, more accurate (less information is lost) and easier to control

 

3. Signal Processing->High Pass Filter: The same as using the transform effect, removing all pixels inside a rectangle around the center and transforming back (again, faster, more accurate, easier controlled)

 

5. Signal Processing->Band Pass Filter: Combination of Low and High Pass Filter.

 

Example: FFT

 

Example images (high pass filtered, adjusted and blended together):

 

 

The plugin actually uses the FFTW library (fftw.org), I have not written the transformation code myself (mainly for performance reasons)

Edited October 19, 2018 by ArgusMagnus
Added links to zipped DLL of Null54's updated version

[Pratyush]

Do you have update of the effect. It is not working on PDN v.4.0.20.

[toe_head2001]

8 hours ago, Pratyush said:

Do you have update of the effect. It is not working on PDN v.4.0.20.

 

These effects seem to work just fine for me on PDN v4.0.21.  What issue are you seeing?

[Ego Eram Reputo]

On 8/25/2015 at 6:02 AM, ArgusMagnus said:

Copy the files "ArgusPaintNet.FTT.dll" and "ArgusPaintNet.Shared.dll" and the folder "NativeBinaries" to the "paint.net/Effects" folder

 

Did you do this??

 

Are you using the Windows Store version? The locations are slightly different see https://www.getpaint.net/doc/latest/InstallPlugins.html#4

[Pratyush]

On 8/24/2015 at 11:32 PM, ArgusMagnus said:

"NativeBinaries" to the "paint.net/Effects" folder

 

I messed that part. I took x64 DLL from x64 folder & deleted all other dll and folder and from from native Binaries. After putting dll in X64 folder in NativeBinaries. Now it is working fine. I placed DLL.

Edited February 1, 2018 by Pratyush

[Rick Brewster]

Just a heads up, this plugin will not work in the upcoming Paint.NET v4.1 update. (see here: https://forums.getpaint.net/topic/113153-paintnet-41-beta-build-6808/?do=findComment&comment=548571 )

 

 

The reason is the use of PointInt32 which has been renamed to Point2Int32. I'm also planning on moving that type, and others (e.g. RectInt32), into a different namespace. So, I'd advise against using it for now.

[null54]

I recompiled the plugin for Paint.NET 4.1.1 using the source code @ArgusMagnus posted.

 

Changes:

• Added a replacement PointInt32 structure to ArgusPaintNet.FFT.

FFT.zip

Source.zip

[Ego Eram Reputo]

On 9/18/2018 at 2:08 PM, null54 said:

I recompiled the plugin for Paint.NET 4.1.1 using the source code @ArgusMagnus posted.

 

Added to the first post. Thanks @null54!

[ArgusMagnus]

Updated, see https://forums.getpaint.net/topic/32337-argusmagnus-plugin-pack-20181019/

[Sakana Oji]

Every time I try to use the effects it gives me this error message:

Quote

File: C:\Users\User\Downloads\paint.net latest\paint.net latest\Effects\ArgusPaintNet.FFT.dll
      Name: ArgusPaintNet.FFT.BandPassFilterEffect
      Version: 1.0.0.0
      Author: Argus Magnus
      Copyright: Copyright © ArgusMagnus 2015
      Website: http://forums.getpaint.net/index.php?/topic/32205-fft-ifft-effect/
      Full error message: PaintDotNet.WorkerThreadException: Worker thread threw an exception ---> System.EntryPointNotFoundException: Unable to find an entry point named 'fftw_alloc_complex' in DLL 'libfftw3-3.dll'.
   at ArgusPaintNet.FFT.FFTWInterop.FFTW.fftw_alloc_complex(Int32 size)
   at ArgusPaintNet.FFT.FFTWInterop.FFTW.GetTwoWayPlan(Int32 width, Int32 height)
   at ArgusPaintNet.FFT.BandPassFilterEffect.OnRenderCore(Rectangle[] renderRects, Int32 startIndex, Int32 length)
   at PaintDotNet.Effects.Effect`1.Render(EffectConfigToken parameters, RenderArgs dstArgs, RenderArgs srcArgs, Rectangle[] rois, Int32 startIndex, Int32 length) in D:\src\pdn\src\Effects\Effect`1.cs:line 99
   at PaintDotNet.Effects.BackgroundEffectRenderer.RenderWithClipMask(Effect effect, EffectConfigToken token, RenderArgs dstArgs, RenderArgs srcArgs, RectInt32[] rois, IRenderer`1 clipMaskRenderer) in D:\src\pdn\src\PaintDotNet\Effects\BackgroundEffectRenderer.cs:line 196
   at PaintDotNet.Effects.BackgroundEffectRenderer.RendererContext.RenderTile(EffectConfigToken token, Int32 tileIndex) in D:\src\pdn\src\PaintDotNet\Effects\BackgroundEffectRenderer.cs:line 175
   at PaintDotNet.Effects.BackgroundEffectRenderer.RendererContext.RenderNextTile(EffectConfigToken token) in D:\src\pdn\src\PaintDotNet\Effects\BackgroundEffectRenderer.cs:line 167
   at PaintDotNet.Effects.BackgroundEffectRenderer.ThreadFunction() in D:\src\pdn\src\PaintDotNet\Effects\BackgroundEffectRenderer.cs:line 267
   --- End of inner exception stack trace ---
   at PaintDotNet.Effects.BackgroundEffectRenderer.DrainExceptions() in D:\src\pdn\src\PaintDotNet\Effects\BackgroundEffectRenderer.cs:line 443
   at PaintDotNet.Effects.BackgroundEffectRenderer.Abort() in D:\src\pdn\src\PaintDotNet\Effects\BackgroundEffectRenderer.cs:line 399
   at PaintDotNet.Effects.BackgroundEffectRenderer.Start() in D:\src\pdn\src\PaintDotNet\Effects\BackgroundEffectRenderer.cs:line 345
   at PaintDotNet.Menus.EffectMenuBase.<>c__DisplayClass47_5.<RunEffectImpl>b__5() in D:\src\pdn\src\PaintDotNet\Menus\EffectMenuBase.cs:line 1068
 

 

[BoltBait]

13 minutes ago, Sakana Oji said:

Every time I try to use the effects it gives me this error message

 

Do you have the DLL file libfftw3-3.dll installed on your system?

[Sakana Oji]

1 minute ago, BoltBait said:

 

Do you have the DLL file libfftw3-3.dll installed on your system?

Yes, I already copied it to my folder and it's fixed!

[Mighty]

I just started a thread

and someone pointed me at FFT.  I found this plug I found this plug in.  But, when I use it, I get all blue or all black.

 

I just searched, and I do have a copy of libfftw3-3.dll.  It came with Inkscape, and I just checked and the Inkscape/bin folder is in the path.

 

There's only the one control on the effect, so there isn't much I can be doing wrong.

 

What can I do to troubleshoot this?

[Pixey]

Are you just trying to remove the background?  If so, you can do this for free here.

 

If, on the other hand, you are trying to remove the 'bumpiness' of the canvas on the image, here is a solution I did for another person with the same problem.  Athough not perfect, it is not easy to remove a texture without blurring.

 

 

 

[Mighty]

On 12/11/2020 at 10:13 AM, Pixey said:

Are you just trying to remove the background?  If so, you can do this for free here.

 

If, on the other hand, you are trying to remove the 'bumpiness' of the canvas on the image, here is a solution I did for another person with the same problem.  Athough not perfect, it is not easy to remove a texture without blurring.

 

 

 

Thanks for the suggestion.  I've played around with that plugin, a little.  As you found in the other thread, it's difficult to find something that hides the physical texturing without blurring and posterizing the skin tones so much that it plummets in quality.

 

Was the original response I got correct?  Is FFT the correct tool for this sort of situation?  If someone can help me troubleshoot the issue I'm having, I'd like to give it a try.  Should I look for another copy of libfftw3-3.dll and drop it into the Paint.NET folder?

[Pixey]

12 hours ago, Mighty said:

Is FFT the correct tool for this sort of situation? 

 

I really don't know and hopefully @Reptillian who suggested it, can help you a bit more on what this does.  I've downloaded this myself and also get a very black result.  I'm also not sure where this libffw3-3.dll is supposed to go.  I googled it and it sounds like it's supposed to be in the Windows Folder?  Hopefully someone else can explain about this.

 

There is another Plugin which may be of help: