HDR PhotoStudio

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".

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. HDR PhotoStudio was discontinued in July 2010.

BEF is an HDR (High Dynamic Range) image format developed by Unified Color. The BEF format can archive image data with any dynamic range, full human color range, and a quality setting directly tied to color data precision; the used techniques ties it with JND — just noticeable difference parameter.