![]() ![]() "Tone Mapping" is the technology used to convert a 32-bit float pointing format to 8-bit images for display or print. Therefore, although a 32-bit float pointing 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. However, a 32-bit float pointing value cannot be displayed or printed on current 8-bit monitors or printers. ![]() Compared with conventional 8-bit image formats like JPEG or BMP, the 32-bit float pointing format has the capability to record a much wider range of values, and can thus accurately capture the full dynamic range of the real world. After the compensation of alignment and ghost reduction, photos with different exposures will be merged into a digital HDR negative, which is also called a 32-bit float pointing radiance map in the HDR imaging workflow.
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