HDR PhotoStudio

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HDR PhotoStudio
HDR PhotoStudio screenshot.jpeg
HDR PhotoStudio screenshot
Developer(s) Unified Color
Stable release Discontinued (latest version 2.15.42) / Mar 2010
Operating system Microsoft Windows
Type High dynamic range imaging
License Proprietary
Website http://www.unifiedcolor.com

HDR PhotoStudio was an advanced HDR (High Dynamic Range) digital imaging software application developed by Unified Color for Microsoft Windows XP/Vista/7 and Apple's Mac OS X. In addition to being a HDR-merge application, HDR PhotoStudio offered a set of image editing operations that work in its dynamic range (the website showed an example of processing an image with 1,000,000:1 contrast ratio), human color range (gamut), and in high precision (32-bit floating point). It also had a Color Integrity feature that allowed users keeping an image's color tone during HDR PhotoStudio image editing operations — for example changing the contrast of an image would not change image's chromatic (color tone) data. This problem is usually referred to as "color shift".[1][2][3][4]

HDR PhotoStudio implemented an advanced HDR image compression format called BEF, and a plug-in for opening and saving files in Adobe Photoshop was also included with the application.[5] HDR PhotoStudio was discontinued in July 2010.


  • Unified Color model: support for merging and editing HDR images with any dynamic range, human color range, and Color Integrity (to avoid "color shift" issue).
  • Support for RAW camera formats.
  • Support for import HDR images from Radiance HDR and OpenEXR formats.
  • An advanced technique of HDR data rendering.[6]
  • Scripting support via image recipe.
  • Halo removal technique.
  • Powerful noise elimination.
  • 32-bit/channel floating point high precision representation of image data (96 bit/pixel).
  • Multi-core processors support.


  1. ^ "HDR PhotoStudio features". 
  2. ^ Christian Bloch (Jun 1, 2009). "HDR PhotoStudio sets a new standard for HDR editing". 
  3. ^ Sally Wiener Grotta and Daniel Grotta (Jan 13, 2010). "HDR PhotoStudio Creates Vivid, Detailed Images". 
  4. ^ "Comparison of tone-mapping between HDR PhotoStudio and Photomatix". 
  5. ^ "BEF file format" (PDF). 
  6. ^ "HDR Rendering Comparisons".