Blending makes the sharp changes occurring at the cut line appear more gradual by altering pixel values at the cut line. The blend width sets the number of pixels over which the blending will take place. For example, if the blend width is 8, the pixel values 4 pixels into the uncorrected image from the cut line will be composed 100% of the original uncorrected image pixel value. Similarly, the pixel values 4 pixels into the georeferenced image from the cut line will be composed 100% of the original georeferenced image pixel value. At the cut line, the pixel values will be composed 50% of the uncorrected image pixel values and 50% of the georeferenced image pixel values.
It is important to note that blending will not fix poor registration problems. For instance, if a road does not match up well at a cut line, the match up will be no better and may even be more obvious after blending is complete.
The blending width may be altered on the ``Disk to Disk Registration'' and ``Pre-Registration Checking'' panels.
See Also: Pre-Registration Checking, Disk to Disk Registration