Search Results for "frequency"
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Showing 8 open source projects for "frequency"
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libvips
A fast image processing library with low memory needs
...Compared to similar libraries, libvips runs quickly and uses little memory. libvips is licensed under the LGPL 2.1+. It has around 300 operations covering arithmetic, histograms, convolution, morphological operations, frequency filtering, colour, resampling, statistics and others. It supports a large range of numeric types, from 8-bit int to 128-bit complex. Images can have any number of bands. It supports a good range of image formats, including JPEG, JPEG2000, JPEG-XL, TIFF, PNG, WebP, HEIC, AVIF, FITS, Matlab, OpenEXR, PDF, SVG, HDR, PPM / PGM / PFM, CSV, GIF, Analyze, NIfTI, DeepZoom, and OpenSlide. ... -
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Image16
Image viewer/editor specialized in astrophotography 16bits processing
Opens/saves TIF, FITS, PNG, XISF, PXM, RAW, JPG, XCF, PSD, WEBP. AsinH, Sqrt, Ln, Exp and Sqr stretching, HSL and RGB adjusting, Levels and Curves adjusting and Background Extraction for Color Balance, Flatness and Gradient Correction. Arithmetic between images. Resizing and croping. Color Balance based on background, selection or stars B-V (after platesolving). Debayering/Bayering. Inversion, mirroring, rotation, barrel/pincushion correction. RGB alignment/shifting. Erode, Dilate, ...... -
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Partial Image Encryption encrypts the huffman encoded high frequency coefficients in a jpg image file. The encryption is done in-place so the project can eventually be ported to a Windows kernel filter driver. Just encrypting the high level frequency coefficients serves to blur the image, but almost in an artistic way. The image contents are fully recognizable, but the details are pixelated or blurred.
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MapGrid Info
Get map grid (raster) information: size, value summaries, frequencies
...It displays number of rows, columns and cells, the nodata value, maximum and minimum values, the mean, median and mode of values, and grid cell size in map units. It also displays a frequency distribution of grid values. It opens tif, asc and bil formats. Please Review -
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5
angif layered
angif fork with transparency layers (proof of concept implementation)
fork of Phil Howards Angif 1.0.0 beta3 (http://freecode.com/projects/angif) Implemented "layered" (usage of transparency) 24bit color-depth support for gif instead of the original tiled one (mosaic of 255 color gifs). Instead of the divide-and-conquer approach this one uses sorting (bubble sort, sorry) for color frequency and distance grouping. Build as windows command line tool with MingGW. Workflow: import truecolor image to GIMP, export 24RAW from GIMP, feeding to rawtogif.exe e.g. "rawtogif.exe 1024 768 sunflower.raw" output a uncompressed (no LZW compression) GIF, needs to be feed to gifsicle for reasonable size. -
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DeconvDemo
An image deconvolution / deblur software
DeconvDemo is a Qt & opencv based image deconvolution/ deblur software which is including the spatial and frequency domain solver. image deconvolution / deblur software with non-blind deconvolution algorithm New: Add pregressive non-blined deconvolution Add blind kernel estimation Implemented mehtod: METHOD_WIENER, METHOD_TIKHONOV, METHOD_LUCY_RICHARDSON, METHOD_CONJUGATE_GRADIENT, METHOD_SPARSE_PRIOR, METHOD_GAUSSIAN_PRIOR, METHOD_NAIVE_EDGE_ENHANCEMENT, METHOD_CONVOLUTION, METHOD_PROGRESSIVE, METHOD_BLIND_KERNEL Improving: sparse prior blind deconvolution. ... -
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Resolution changer program, similar to Win98 tray icon. Lists all available resolutions of the display. Sets the maximum frequency available at the selected resolution. Supports command line.
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Some Plugins for gimp or standalone usage: Fourier for and backward transformation for gimp AFP Overlay file plugin (read) scaling in the frequency domain
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