HDR Photography in Microsoft Excel?!
summary
Implements the Berkeley HDR linear-equation algorithm inside Microsoft Excel, recreating the camera response curve via a large system of equations and a matrix pseudo-inverse rewritten into Excel formulas. Loads eight exposures, uses conditional formatting as pixels, hits 13 GB RAM during assembly and a ~30 second calculate step, and outputs a merged image where the church stained glass visible details appear in windows that were blown out before. A proof-of-concept spreadsheet that actually produces usable HDR — HDR in Microsoft Excel.
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chapters (7)
- 0:00Start
- 0:45Hdr in Microsoft Excel
- 1:38Reciprocity
- 1:57Non-Linearity
- 5:54Linear Algebra
- 7:20Conditional Formatting
- 11:01Final Result
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