See INSTALL for instructions on how to compile and install vgrid.

Description

Vgrid is a virtual grid program for radiology that enhances the contrast of
radiographs by means of the algorithm 'Adaptive Windowing'.

Adaptive Windowing is based exclusively on linear transformations of pixel
values so that the contrast in the neighborhood of each pixel is expanded
until it fills the full range of values available. The effect is similar to
passing a "contrast magnifier" over the image.

Vgrid reads images in PNG greyscale or RGB format and saves images in PNG
format using by default the same bit depth as the input image.
Vgrid accepts images with a bit depth of 8 or 16 bits.

If no file names are specified, vgrid reads an image from standard input and
writes the result to standard output.


Copyright (C) 2020, 2021 Sonia Diaz Pacheco.

This file is free documentation: you have unlimited permission to copy,
distribute, and modify it.

The file Makefile.in is a data file used by configure to produce the
Makefile. It has the same copyright owner and permissions that configure
itself.

The file test.png is a scaled down image of a radiograph originally from the
Indiana University hospital network and is distributed here under a fair use
exception. (It is only used to test the compiled program with 'make check').
