snapWerx uses HDRI processing in all of our available/low light architecture photography.
So what is HDRI?
HDRI (High Dynamic Range Imaging) arose primarily in digital photography to improve the overall exposure of a captured image. In a typical night or evening scene, there will be a large difference in the lightest area of an image (ie, lights) and the darkest areas (ie shadows), along with areas between the two in terms of exposure. If we were to use just one exposure setting correct for the overall scene, two of those areas would not be properly exposed.
- Shadows will have no detail
- Lights will be too bright (saturated)
- For this reason, we actually take three photos of each scene
- One at the correct exposure level (properly exposed for the overall scene)
- One underexposed (properly exposed for the lights)
- One overexposed (properly exposed for the shadows)
Back in the snapWerx editing computer, we then run special software which uses data embedded in each of the three photographs to merge the three images into one properly exposed image. This will generally result in much improved exposure throughout the photograph and richer, better colors. The HDRI software has many adjustment parameters which may be applied to the photograph and even create some very unique effects. The photograph (Morrocroft Center, Southpark, Charlotte) in this posting shows the three different exposures and the final result after HDRI processing. That’s HDRI!