Apple Shake 4 - Manual (Page 786)

786 Chapter 26 Transformations, Motion Blur, and AutoAlign
Using the AutoAlign node to align the second image with the first, you can quickly
match the clean plate still to the moving image sequence, and then output the newly
aligned and animated clean plate for use by a paint or rotoscoping operation to paint
out the safety line.
Blending at the Seams
Two parameters help to automatically manage the seams between images that have
been aligned with the AutoAlign node:
• blendMode automatically adjusts the overlapping border between two aligned
images, intelligently selecting which portions of each image to retain for a seamless
result.
• matchIllum automatically adjusts the brightness of each aligned image so that the
exposure matches.
AutoAlign Limitations
Successful use of the AutoAlign node is highly dependent on the content of the input
images, and results will vary widely from shot to shot. In general, moving images with
a great deal of perspective and parallax can be difficult for the AutoAlign node to
analyze properly, and may cause unexpected results.
blendMode set to none blendMode set to smartBlend