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