Step 3: Generate the HDR image
The next window lets you specify options for creating the HDR image.
We will use the default settings. Even though the 3 photos of the Grand Canal were taken using a tripod, we will leave the option "Align source images" checked. This option corrects for small alignment problems that may happen even with a tripod
Click the OK button.
Photomatix will now merge your differently exposed photographs into a single HDR image that represents the complete tonal range captured by the photos.
Note: While the pixel values of your source images are discrete values in a finite range such as 0-255 or 0-65535, the pixel values of the HDR image are in floating point representation in order to properly represent the complete range from deep shadows to bright highlights.
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