Template:Blenders

None: no blending is performed; the "top picture" is used. The stitching seams are obviously visible (geometry and/or brightness).
Linear: : this mode is very fast and can be a good compromise between quality and speed if you are not too demanding on quality.
Multiband: this slower mode will produce much better results than the "Linear" mode. The transitional areas between images will hardly visible. However this mode does not take into account objects that could have moved from one shot to another and some “ghosting” can occur.
Smartblend: this blender combines a Multiband blender and picture analysis engine in order to identify common objects present in the source images (a moving object, a strong line,…). Based on the results of this analysis, Smartblend tries to keep the features common between images (edges, lines, curves,…) and automatically discard objects that have moved between shots. Even though much slower than the other algorithms, this blender produces a much higher rendering quality.
Be aware: this blender is not HDR compatible yet.