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Blending in general is the process of overlaying two or more images such, that any image contributes a certain amount to the result image.


There are at least two relevant usages of blending:

image stack

To process a stack of images where differently exposed or differently focused parts of the images contribute to the result:

F.e. enfuse does both blending types.


To avoid visible seams between adjacent images of a panorama. This is currently best done with a multi resolution blender like enblend, smartblend or the PTGui internal blender. This blending type is inherent part of the stitching process.