# Package PIRL.Image_Tools

The PIRL Image_Tools package contains tools for working with images.

See: Description

Class Summary
Class | Description
--- | ---
Equirectangular_Projection |
HTTP_ImageInputStream | An HTTP_ImageInputStream provides an ImageInputStream interface to a remote source file accessed by a URL reference.
JP2_Info | JP2_Info provides a set of PVL Parameters that describe the contents of a JP2 file.
JPEG2000_Codestream_Info | JPEG2000_Codestream_Info provides a set of PVL Parameters that describe the contents of a JPEG2000 codestream.
JPEG2000_Info | JPEG2000_Info is a Parameter Aggregate describing a file of JPEG2000 information.
Multibuf_ImageInputStream | An Multibuf_ImageInputStream provides an ImageInputStream interface to a List of ByteBuffers.
Polar_Stereographic_Elliptical_Projection |
Polar_Stereographic_Spherical_Projection |
Projection | A Projection is used to algorithmically map, or "project", from one image coordinate system to another while maintaining the spatial relationships of all coordinates.

## Package PIRL.Image_Tools Description

The PIRL Image_Tools package contains tools for working with images.

The HTTP_ImageInputStream implements the ImageInputStream interface for a remotely accessed file via the HTTP protocol. Random access is provided by buffering source data using content ranging from the remote file. Automatic URL redirect and reconnect is supported.

A set of classes are provided for accessing JP2 image file format metadata boxes and its embedded JPEG2000 codestream segments descriptions. The information is provided as a PVL Parameter Aggregate.

A set of Projection classes are provided for mapping coordinates between image x,y and real world longitude,latitude values. The required map projection information is contained in a PVL Parameter Aggregate used to construct the Projection. A Projection factory method will examine the parameters to determine the specific subclass that implements the appropriate projection algorithms that is to be loaded and constructed.