JPEG-HDR

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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 file. 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.

Support

Software programs that support JPEG-HDR's include Photosphere (by Greg Ward) and pfstools. A Software Encoder was available from BrightSide Technologies (formerly Sunnybrook Technologies, acquired by Dolby Laboratories in 2007).

Similar formats

Other formats that use a similar idea of storing extra HDR information in a standard JPEG image include CLARITY-HDR, XDepth (both from Trellis Management) and ERI (from Kodak).

References

External links

v t e Graphics file formats

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Raster	ANI ANIM APNG ART BEF BMP BSAVE CAL CIN CPC CPT DPX ECW EXR FITS FLIC FPX GIF HDRi HEVC ICER ICNS ICO / CUR ICS ILBM JBIG JBIG2 JNG JPEG JPEG 2000 JPEG-LS JPEG-HDR JPEG XR MNG MIFF PBM PCX PGF PGM PICtor PNG PPM PSD / PSB PSP QTVR RAD RGBE SGI TGA TIFF TIFF/EP TIFF/IT Logluv TIFF WBMP WebP XBM XCF XPM

Raw	CIFF DNG ORF

Vector	AI CDR CGM DXF EVA EMF Gerber HVIF IGES PGML SVG VML WMF Xar

Compound	CDF DjVu EPS PDF PICT PS SWF XAML

Related	Exchangeable image file format (Exif) Extensible Metadata Platform (XMP)

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