Timeline for How does HDR movie work?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 7, 2015 at 8:35 | comment | added | Michael C | Since the predominant display medium today is an 8-bit JPEG displayed on an 8-bit monitor, squeezing all of the information of a 14-bit file with 10-12 stops of dynamic range into a JPEG file with about 7 stops of DR is a form of High Dynamic Range imaging. | |
| Jun 7, 2015 at 8:34 | comment | added | Michael C | High Dynamic Range Imaging (HDR imaging) is much broader than combining multiple images into a 32-bit floating point file. It is any photographic method that allows a scene with a higher dynamic range than the display medium to be rendered by squeezing that range into the display medium. In the 1850s it was what Gustave LeGray was doing by combining an image of a sky and another image of the beach to create seascapes. In the mid 20th century it was what Ansel Adams was doing with the zone system and dodging and burning | |
| Jun 6, 2015 at 13:01 | comment | added | DetlevCM | @Michael Clark You can, however normally one uses HDR to capture a dynamic range beyond what the sensor covers. I would not refer to compressing a single RAW file as HDR - plus, very few cameras record RAW video (outside of very expensive professional models). | |
| Jun 6, 2015 at 1:34 | comment | added | Michael C | You could also do it with a single frame from a camera that converts the raw data from that single frame into two disparately processed frames, one darker and one lighter. There is as much information in a single 14-bit raw file as there is in a -3, 0, +3 series of JPEGs. | |
| Jun 5, 2015 at 13:26 | history | answered | DetlevCM | CC BY-SA 3.0 |