Easy creation of stunning HDR images at lightning speed and results with professional features. HDR stands for High Dynamic Range, and HDR photography utilizes technology that allows you to capture a much wider range of lighting, colors and detail than is possible with a standard camera alone.
HDR software combines three or more differently exposed photos of the same scene into a single photo that accurately captures the details and vivid colors of the world as seen by the naked eye. The advantage of HDR technology is that it retains detail that is lost with standard digital cameras and it reproduces vivid colors in both the light and dark areas of a photo simultaneously.
Usually, the first step of HDR software is to merge photos with different exposures into a digital HDR negative, which is also called a 32-bit float point radiance map. Compared with conventional 8-bit image formats like JPEG or BMP, the 32-bit float point format has the capability to record a much wider range of values, and can thus more accurately capture the full dynamic range of the real world. However, a 32-bit float point value cannot be displayed or printed on current 8-bit monitors or printers. Therefore, although a 32-bit float point radiance map records extremely accurate values, at this stage they are just meaningless numbers from the user's perspective because the results cannot be seen. "Tone Mapping" is the technology used to convert a 32-bit float point format to 8-bit images for display or print. Since a 32-bit float point radiance map is also referred to as the digital HDR negative, Tone Mapping can be regarded as a kind of photo development, but for digital photos.
HDR Darkroom 3 - 64-bit software