JPEG-HDR is an extension to the standard JPEG image file format allowing it to store High dynamic range images.

Overview

JPEG-HDR was created by Greg Ward and Maryann Simmons as a way to store High dynamic range images inside a standard JPEG image format. This reduces the file size required to store HDR images compared to other HDR formats such as Floating point TIFF and RGBE. It does this by first converting the image into a Tone mapped version and storing a reconstructive multiplier image in APP11 markers in the same jpeg file. Ordinary viewing software will ignore the multiplier image allowing anyone to see the Tone mapped version of the image. One of the few software programs that support complete JPEG-HDR's is Photosphere by Greg Ward.

See also

• JPEG
• JPEG File Interchange Format
• High dynamic range imaging
• Tone mapping
• Image file formats

References

• JPEG-HDR: A Backwards-Compatible, High Dynamic Range Extension to JPEG (pdf)
• Subband Encoding of High Dynamic Range Imagery
• Art of HDR

External links

• Anyhere Software