Free fft software for windows

FFT3dGPU is a GPU version of Fizicks FFT3DFilter. The algorithm (Fast Fourier Transform, denoising) is the same for the most part. Currently the following is not implemented: support for interlaced video or YUY2 colorspace or noise pattern.
In this version the next frame is processed while waiting for the GPU to end its work. Meaning the filters before fft3dGPU are working concurrently with it.
Installation
To use this filter you need directx 9.0c or better and a graphics card supporting directx 9 in hardware. That is at least an ATI Radeon 95xx or Nvidia Geforce fx 5xxx. Geforce 6xxx or better is recommended. If you have downloaded the installer just run it at youre done, else copy fft3dgpu.hlsl and copy FFT3dGPU.dll into the same directory, also copy d3dx9_30.dll to the c:\windows\system32 directory.
Older versions also had fft3dgpu9b.dll (not available at the moment) for Directx 9.0b support (DONT copy both dll into the autoload directory.) Directx 9.0c might be faster for people using Nvidia Geforce 6xxx because it adds support for pixelshader 3.0. If you dont have the latest version of directx installed (april 2006 or later) you can get it here or extract the file d3dx9_30.dll to the c:\windows\system32 directory. The installer will copy d3dx9_30.dll to the right location meaning that it shouldnt be neccesary to run the directx installer if you have Directx 9c installed.
Syntax
FFT3DGPU(clip, float "sigma", float "beta", int "bw", int "bh", int "bt", float "sharpen", int "plane", int "mode", int "bordersize", int "precision", bool "NVPerf", float "degrid", float "scutoff", float "svr", float "smin", float "smax", float "kratio", int "ow", int "oh", int "wintype" , int "interlaced", float "sigma2", float "sigma3", float "sigma4", bool "oldfft" )
Function parameters:
clip: the clip to filter. The clip must be YV12.
sigma and beta has the same meaning as in fft3dfilter. Default=2.
sigma2, sigma3, sigma4 If specified controls the sigma value for highest(sigma) to lowest frequency(sigma4). Default=sigma
bw,bh: blockwide and block height. It should be a power of 2 ie valid values is 4,8,16,32,64,128,256,512 (note that bw should be greater than 4 for best result). Default=32
bt: mode. bt=-1 sharpen only, bt=0 kalman filtering, bt=1 is 2d filtering, bt=2 uses the current and previous frame, bt=3 uses the previous current and next frame, bt=4 uses the two previous frames, the current and next frame. default 1
sharpen: positive values sharpens the image, negative values blurs the image. 0 disables sharpening. Default 0.
plane: 0 filters luma, 1,2 and 3 filters Chroma (both U and V). 4 filters both luma and chroma. Default 0.
mode: 0 only overlaps 1:1. This is faster but produces artifacts with high sigma values.
mode=1 block overlaps 2:1. This is slower but produces fewer artifacts.
mode=2 again 1:1 overlap but with a additional border. This reduces border artifacts seen with mode=0. The speed is between mode 0 and 1.
Kalman(bt=0) works well with mode=0. Default 1
bordersize: only used with mode 2. Defines the size of the border. Default is 1.
precision: 0: to use 16 bit floats(half precision),
1: to use 32 bit float(single precision) for the fft and 16 bit float for the wienner/kalman and sharpening.
2: allways use 32 bit floats.
Using 16 bit float increases the performance but reduces precision. With a Geforce 7800GT precision=0 is ~1.5 times faster than than mode 2. Default=0.
NVPerf: Enables support for NVPerfHUD (http://developer.nvidia.com/object/nvperfhud_home.html). Default false.
degrid: Enables degriding. Only works well with mode=1. Doesnt degrid the Kalman filter (but it does degrid the sharpening (if enabled) after kalman filter). default 1.0 for mode=1, 0.0 for mode=0 or 2
scutoff, svr, smin, smax:Same meaning as fft3dfilter. Controls the sharpening. default scutoff=0.3, svr=1.0, smin=4.0, smax=20.0
kratio: same as fft3dfilter. Control the threshold for reseting the Kalman filter. Default 2.0
ow,oh: this only works with mode=1. This specifies how big the overlap between the blocks are. Overlap size must be less than or equal to half the blocksize. Ow must be even. Default: ow=bw/2 ,oh=bh/2
wintype: Change the analysis and syntesis window function. Same as fft3dfilter
interlaced: Set to true for separate filtering for each field. Default=false.
oldfft: Set to true to use the old fftcode (used in version 0.6.2 and lower) false to use new fft code. If not defined fft3dgpu will use the fastest code.
FAQ:
Q: What does it mean when I get a popup box Unexpected error encountered with Error Code: D3DERR_OUTOFVIDEOMEMORY.
A: It means that fft3dgpu needs more memory than there are availebol on the graphics card. So either you will have to upgrade or try lowering the resolution,bt,bh,bw,ow,oh or use usefloat16=true or mode 0 or 2
Q: What setting gives the same result as fft3dfilter?
A:fft3dGPU(mode=1,precision=2) is similair to fft3dfilter() but please note the different default values for bw,ow,bh,ow
Q: Is there any differences between fft3dfilter and fft3dgpu?
A: Some of the features from fft3dfilter is still missing.
Q: Why is fft3dGPU so slow compaired to fft3dfilter?
A: either you have a slow graphics card like a Geforce FX 5200 or you are not using it while doing cpu heavy encoding (like XviD/DivX)
Q: How do I use NVPerfHUD?
A: set NVperf=true and used this commandline or make a shortcut to run it: "PATH TO NVPerfHUD\NVPerfHUD.exe" "PATH TO VIRTUALDUBMOD\virtualdubmod.exe" "PATH TO AVS\test.avs" and enabled "force NON PURE device"
Q: I get this errormessage: "Only pixelshader 2.0 or greater supported"
A: It is because you need a graphics card that has hardware support for Directx 9.

that is attached to the PCs sound card
and displays the audio both in the time domain and in the frequenct domain.
This screen saver works correctly with Windows to support password protection while in screen saver mode.

Bitmap image-editing application that lets you retouch existing photos or create original graphics Free Image Editor is a bitmap image-editing application that lets you retouch existing photos or create original graphics.
Free Image Editor is a nice and useful program and gives you the tools and supplies of a professional graphic design studio.
There is TWAIN and support for importing from any scanner. Free Image Editor provides a rich graphics toolset for digital photography, print production and Web design.
Main features:
Input/output:
- JPEG (RGB, GrayScale, YCbCr, CMYK, YCbCrK) loading and saving.
- JPEG2000: JP2, J2K and JPC code stream formats (JPEG-2000 Part-1 standard, ISO/IEC 15444-1) loading and saving.
- TIFF (rev.6.0, Packbits, CCITT G.3 and G.4) with RGB, CMYK, B/W, CIELab color spaces loading and saving. Also FAX (CCITT3) format supported for loading.
- PNG with various compression levels loading and saving.
- Compressed and uncompressed BMP in 2,16,256 or 16M colors loading and saving.
- Compressed and uncompressed PCX in 2,16,256 or 16M colors loading and saving.
- DIB, RLE, TGA (TARGA, VDA, ICB, VST, PIX) loading and saving.
- Portable Bitmap PBM, PGM and PPM loading and saving.
- WBMP (Wireless Bitmap) uncompressed and black/white loading and saving.
- GIF in 2,4,8,16,32,64,128 or 256 colors loading and saving.
- WMF, EMF (input as raster), ICO and CUR loading.
- RAW Camera formats (CRW, CR2, NEF, RAW, PEF, RAF, X3F, BAY, ORF, SRF, MRW, DCR) loading.
- MultiPage TIF, GIF and AVI loading and saving.
- PhotoShop PSD format loading and saving.
- Saving/loading of specific file format parameters and saving/loading of preview dialogs (e.g. you can set quality of a Jpeg and view immediately the quality loss).
- Progress monitoring with saving and loading.
Input (extra):
- Image properties getting without loading it.
- Image acquisition from TWAIN scanner with full control of the scanner capabilities.
- Screen capture by various methods (all desktop, rectangle selection, object and active window).
- Video capture from various video sources.
Image processing and analysis:
- Decreasing and increasing of raster lines thickness.
- Image and paper resizing.
- Image rotation any angle by various methods.
- Image deskew by various methods.
- Horizontal and vertical flip.
- Image invert conversion.
- Selected region cropping.
- Conversion to gray scale and negative.
- Color to other color replacing .
- Median cut and Neural network color quantizers, for fast and accurate color reduction.
- Reduction to any number of colors (with colormap output).
- HSV and RGB channels separations.
- Color equalization.
- Regulation of contrast, HSL, HSV/ HSB and RGB components.
- LineArt filters: despeckle and so on.
- Application of 3x3 filters.
- Fast Fourier Transformation (FFT) with preview.
- Maximum (dilation), Minimum (erosion), Opening and Closing filters with preview.
- Picture filters (soften, sharpen, color emboss, gaussian blur, antialias, remove red eyes and auto equalize).
- Contour filters (find edges and trace).
- Bump mapping, lens, wave, morph and other effects.
- Preview of all the effects in a single dialog, with 8 preset filters and save/load filters from file.
- Progress monitoring for image processing tasks.
- Multilevel Undo/Redo for raster editing.
- Raster layers.
Raster paint operations:
- Various paint tools (sketch, line, ellipse, curve, rectangle, round rectangle, flood fill, spray, eraser and eyedropper).
- Various pen styles (solid, clear, dash, dot, dashdot and dashdotdot).
- Various brush styles (solid, clear, cross, diagonal cross, b-diagonal, f-diagonal, vertical and horizontal).
- Choice of pen and brush colors.
Image rendering:
- Real time Zoom-in and Zoom-out (by percentage, zoom in rectangular area or by one mouse click). Zoom-previous is also available.
- Real time Pan (click and drag the image with mouse).
- Scrollbar in two dimensions for the fast exploration of the image.
Printing:
- Printing (and print preview) functions to print single images specifing page alignment or absolute position.
System requirements:
- PentiumII
- 64 MB RAM

MetaBench is a benchmarking program being developed by 7Byte. It is consisted of more than 45 different tests designed to benchmark high-end systems.
Benchmarks are carefully designed in consideration with new CPUs and system architectures. It consists of two types of benchmarks: Synthetic and practical.
Its synthetic test measures different components performance purely. Practical tests are consisted of different algorithms being used in different software. They are designed to measure erformance of the whole system as unit.
They include Ogg Vorbis audio encoding/decoding(very similar to MP3), Fast Fourier Transforms (FFT) tests and PPMD compression method.
Enhancements:
- Raytrace rendering benchmark is added(Multi-threaded)
- Blowfish encryption/decryption benchmark is added
- Multithreaded version of QuickSort is added
- Bug fixed: crashes on some multi-threaded tests
- Small bugs fixed

Near real-time equalizer based on FFT alogorithm. Can be used to equalize the sound from CDs. Source-code available on request.