World Library  
Flag as Inappropriate
Email this Article

HDRi (data format)


HDRi (data format)

The proprietary HDRi data format is a 64bit (color) or 32bit (greyscale) data format for saving RAW data of HDR scans including infrared data in a TIFF container developed by LaserSoft Imaging.[1][2]


  • Data format 1
  • Description 2
    • Application 2.1
  • See also 3
  • References 4

Data format

Format Encoding Compression Color space Color depth
(Bit per pixel)
Dynamic range
(Dimensions of 10)
(.tif, .tiff)
RGB (linear) none RGB 64 = 48 + 16 (infrared channel) 4,8 0,0014%
RGB (linear) none RGB 32 = 16 + 16 (Infrared channel) 4,8 0,0014%


Some image scanners, especially film scanners provide an additional infrared channel. The data it collects during a scan can be used for image optimization, e.g. for scratch and dust removal. The infrared RAW data and the usual image RAW data get saved in the HDRi data format, where 16bit per color channel are used for every pixel and additional 16bit for the infrared channel. Thus, a HDRI color file devotes resources of 64bit per pixel and a HDRi greyscale file 32bit per pixel.


The infrared RAW data is saved lossless with the image RAW data. Therefore it isn't necessary to process them while scanning. This facilitates the digitalization of larger archives. Afterwards, the so filed originals can be post processed at any time with dust and scratch removal, possibly in batch mode.

See also


  1. ^ Article on HRDi and iSRD
  2. ^ HDRi - 64bit RAW data including infrared channel
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.