Only for use in making shapes, etc. Original images do not have to be represented by the same number of color or greylevels. For example, can morph a color with a greyscale image. Choose images where you can visualize in your head how the morph would work. Works best on sets of images which are similar in composition.
Ofcourse quality is a great function of the keypoints selected.
The user sets up key points. The significance of the selecting a matching key point in the second image is basically you are saying that this is semantically the corresponding area that the first image's keypoint should evolve into. My guess is that morphing is achieved through a combination of averaging a neighborhood of greylevels surrounding the two corresponding key points over the number of in-between image frames you specify as well as moving these averaged neighborhoods over the line connecting the first image's key point location in the image plane and the final location of the matching keypoint in the second of the two original images. Morph 1.5 application. Dump images for first sequence into the thumbnails of the storyboard window.