Performance
This morphing technique using lines is expressive and the transition from
image to the other is smooth. An example morph movie is shown below.
This technique is based on lines and the only control points used in the
process are those explicitly specified. These lines are exactly moved to where
they are mapped to and everything else is blended smoothly based on those
positions. For example, when morphing between two faces, the same features in
the two images can be mapped and the transition looks life-like to the
eye as the intermediate images also look like real human faces. The
influence of the different lines can be adjusted by modifying the weight
factor. Thus, this technique is more expressive than the mesh warping
technique.
One disadvantage of this method is speed. Because the warping is global,
all line segments need to be referenced for every pixel. The amount of time
taken for each frame is proportional to the product of the number of
pixels in the image and the number of control lines used. The mesh-warping
technique has local control and is therefore faster.
To look at the lines used to do the morph, click here.
Warping
Transformation and Morphing with Points
Performance of Point Morph
Transformations with Lines
Morphing with Lines
Main Morphing Page
Main Project Page
Wed Apr 29 1997