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• Take at least three shots (five shots or more is recommended) of the same
scene with different exposures.
• To capture large exposure differences when taking fewer shots (such as
three to five shots), set the exposure in increments of at least +/- 1.0
Exposure Value. Whereas if you are taking a greater number of shots, you
can set the exposure at lower increments but make sure that the number of
shots are enough to cover a wide range of exposure levels.
To create and save a camera curve profile:
1. Open the photos that were taken using various exposure levels.
2. Select Photo: High Dynamic Range.
3. In the Composition tab, select Auto generate camera curve from the
Camera curve profile choices.
Note: If your photos retained the EXIF data recorded by the digital camera, the F-
stop interval can automatically be determined based on the exposure time
stored in the data. Whereas if your images are non-EXIF images, you need to
manually specify the F-stop interval between your images.
4. Click Save as button to save the camera curve profile.
Note: If you used your camera's Automatic Exposure Bracketing feature and took
two (or more) sets of shots, some photos will have the same shutter speed
and exposure time settings. A message appears when photos have identical
settings. In the Image List Panel, click [-] to remove these photos.
5. Click the Compose button to create an HDR image using the generated camera
curve.
Tip: PhotoImpact includes preset camera curve profiles for some digital camera
models. If there is a camera curve profile available for your camera, you can
directly use it for your photos.
CHAPTER 2: PHOTO EDITING 93
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