G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing
GREYC CNRS ENSICAEN UNICAEN

A Full-Featured Open-Source Framework for Image Processing

Latest stable version: 3.5.3        Current pre-release: 3.5.4 (2025/04/13)

Reference

Table of Contents  ▸  List of Commands  ▸  Values Manipulation  ▸  decompress_from_keypoints◀  decompress_clut    |    decompress_huffman  ▶

decompress_from_keypoints

Arguments:

Description:

Decompress selected sets of keypoints as images (opt. of specified size).

A set of keypoints is defined as a vector-valued image, such that:
The first pixel is a vector which encodes the [ Width,Height,Depth ] of the decompressed image.
The second pixel is a vector which encodes [ Min,Max,Use_RBF ], where Min and Max defines the value range of the decompressed image, and Use_RBF tells is the decompression scheme must use RBFs (Use_RBF=1) or Multiscale Diffusion PDE's (Use_RBF=0).
The remaining pixels define the keypoint coordinates and values, as:
[ x_k,y_k,z_k, v1_k,...,vN_k ] for a 3D target image of N-valued vectors.
[ x_k,y_k, v1_k,...,vN_k ] for a 2D target image of N-valued vectors.
[ x_k, v1_k,...,vN_k ] for a 1D target image of N-valued vectors.
where the coordinates x_k, y_k and z_k are defined respectively in ranges [0,Width-1], [0,Height-1] and [0,Depth-1].
If the width, height and depth arguments are provided, they define the size of the decompressed image, : overriding then the original image size [ Width,Height,Depth ] defined in the keypoints header.
G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing

G'MIC is an open-source software distributed under the CeCILL free software licenses (LGPL-like and/or
GPL-compatible). Copyrights (C) Since July 2008, David Tschumperlé - GREYC UMR CNRS 6072, Image Team.

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