Image::RGBA Version 0.04
========================
Hides all the ugly stuff involved when sampling individual pixel values
from images. A good range of quality levels are provided, currently;
simple, linear and spline16.
For an explanation of what is going on, see:
http://www.fh-furtwangen.de/~dersch/interpolator/interpolator.html
For usage, read the pod documentation, eg:
perldoc Image::RGBA
Also provided is optional radial luminance correction - Suitable for
sampling photographs where there is a known light falloff from the
centre of the image to the edges.
Radial lens distortion can be corrected at the same time using a, b & c
parameters, see:
http://www.fh-furtwangen.de/~dersch/barrel/barrel.html
For usage, read the pod documentation, eg:
perldoc Image::Photo
For typical applications, see the 'examples' folder.
ADVANTAGES
- Inputs any file format supported by ImageMagick (png, jpg, tiff, pdf,
bmp, mng, mpg, whatever).
- Alpha channel information is sampled in the same way as Red, Green &
Blue information.
- Uses spline16 pixel interpolated sampling for high quality results.
- Radial brightness and barrel distortion correction. Independent of
image orientation and brightness, so each camera should have one set
of values that work in all situations.
DISADVANTAGES
- Since it works at a lower level than the Image::Magick Get() method,
it's not quite as flexible.
BUGS
- Probably.
TODO
- Make faster (rewrite in C, contributions welcome).
- Support 16 bit per pixel images.
INSTALLATION
To install this module type the following:
perl Makefile.PL
make
make test
make install
DEPENDENCIES
This package depends on perl and the Image::Magick perl module.
These are available from CPAN, ActiveState, etc..
COPYRIGHT AND LICENCE
Copyright (C) 2002 Bruno Postle <
[email protected]> All Rights Reserved.
This module is Free Software. It may be used, redistributed and/or
modified under the same terms as Perl itself.
