HDR video with SLRs
HDR is kind of cool – a nice way to get past the limitations of solid-state image sensors and recover some of the latitude of film, even improving on it.
The problem is that solid state image sensors tend to have very linear responses to light – an underexposed image vanishes into the noise floor of the sensor while an overexposed image clips off to pure white. Film exposure response is commonly called an “s-curve” and basically means there’s some data in the random conversion of a light sensitive molecule here or there even in the most underexposed image, and a few that resist converting under the harshest blast of light such that there is perceivable data in both.
This film is a pretty impressive example of HDR video. But there’s something a bit odd about such a technical achievement in cinematography mixing up “underexposed” and “overexposed.” The funny thing is, they’re using the terms as in making a print (e.g. printing on photo paper) or an x-ray where more light darkens the print: the paper starts out white and turns black with more light vs. a film or digital exposure where the media yields a black result that increases in representational lightness with with increasing light exposure.
Category: Films • Technology • video
- Get a desktop alert when Thunderbird gets constipated 2023 May 29
- The end of a comic era 2023 May 14
- WordPress forward and back navigation I find pleasing 2023 May 07
- عيد مبارك 2023 April 22
- Technology: maximizing individual radius of lethality. 2023 February 05
- Sidebar featured images only on single post pages 2023 January 24
- LastPass: The Cloud is Public and Ephemeral 2023 January 05
- Some gnuplot and datamash adventures 2022 December 29
- Smol bash script for finding oversize media files 2022 September 02
- Deep Learning Image Compression: nearly 10,000:1 compression ratio! 2022 June 28
- Post History