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Double Expo

HDR Pro

Multi-Exposure

HDRI Shots

 Before on top of the after

ROT Field Mission

 

HDRI

(High Dynamic Range Imagery)
History Of HDRI:
- Using multiple exposures to fix extreme luminance range was used as early as 1850 by Gustave Le Grey
HDRI:
- High Dynamic Range Imagery
- Allows greater range between the light and dark areas of an image.
- This range is "dynamic" because the light values can be modified
- Represents the rage of intensity levels seen by the human eye more accurately.
HDRi File Format VS HDR imagery:
-One is a file format and the other is a photographic technique
- HDRI FF is a 64 bit (color) or 32 bit (B&W) file format for saving RAW date of HDR Scans that includes a channel for infrared data.
HDR Photography:
- Multiple low- dynamic range images are combined.
-  This process is called " Tone Mapping"
-  Shooting multiple exposures for tone mapping is called "Bracketing"
HDR Photography:
- Any camera that allows over or under exposure can be used to create HDRI
- Some cameras have automatic exposure bracketing (AEB)
- These separate exposures are combined with photoshop
HDRI Tips:
- Shoot multiple exposures with a tripod, each exposure must be in the exact same position.
- Portraits are difficult without AEB, but the look of HDRI can be "Faked" with a single exposure.