JPEG XR is the name selected by the JPEG committee for standardization of the HD Photo file format. HD Photo can be considered to be an implementation of the JPEG XR specification. The HD Photo file format is a raster file format developed by Microsoft and it is supported by the Microsoft Photo Info application.
This file format is mainly used for cross-platform image exchange, especially with handhelds, PDAs and limited-capability devices.
LEADTOOLS supports version 1.0 of this format.
This file format supports lossless as well as lossy compressions with a quality factor for the lossy compression, QFactor that ranges from 1 to 255.
This file format does not support progressive loads and saves or lossless JPEG compression.
The file format does not support multi-page files.
The default extension for this format is: HDP.
You can read and write 16-bit grayscale. (Document/Medical only).
For loading or saving CMYK files or LAB color space files, you will also need Leadtools.ColorConversion.dll.
For more information, please refer to http://www.microsoft.com/windows/windowsmedia/forpros/wmphoto/.
File constants associated with this file format are:
| Constant | Read Support | Write Support | Description |
| Hdp | 1,8,16,24,32,48,64 BPP | 1,8,16,24,32,48,64 BPP | JPEG XR / HD Photo - RGB |
| HdpGray | 16 BPP (Grayscale) | 16 BPP (Grayscale) | JPEG XR / HD Photo - Grayscale |
| HdpCmyk | 32 BPP | 32 BPP | JPEG XR / HD Photo - CMYK |
Required DLL: Leadtools.Codecs.Hdp.dll. For a listing of the exact DLLs needed, based on the toolkit version, refer to Files To Be Included With Your Application.
For loading or saving CMYK files or LAB color space files, you will also need Leadtools.ColorConversion.dll.
Related Formats: JPG - JPEG Compressed, JP2, J2K - JPEG 2000 Compressed, TIFF - Tagged Image File Format.