User manual

229

UM-2014.1-07

Warp 4 and Warp 9 are sophisticated image warping tools. They can be used

to fix geometric issues and distortion within image sequences.

Both have a broad application but are of particular use when working with

Stereoscopic 3D sequences.

The two Warp tools are :

Warp 4

The Warp 4 warper is a classic four point warper and allows

warping through the manipulation of the four image corner points.

Warp 9

The Warp 9 warper extends the Warp 4 warper with extra control

points on each side mid-point and the center point.

Both warpers allow warping of all three RGB channels simultaneously, or

each channel separately.

Warper Introduction

Both warper tools are designed to be useful in a wide variety of situations.

The Warp 9 tool should be particularly useful in two important areas described

below. Both areas of specifically relevant to stereoscopic work.

For most Stereoscopic work, you would use a warp tool directly after

the DVO Stereo Fix tool.

Geometric Correction

The Warp 9 tool makes geometric correction straightforward. This issue

arises due to distortion between the camera lenses or the mirror from

the stereo rig and creates a non-uniform vertical mismatch between the

left and right eye images.

By correcting to the center of the image, Warp 9 can then adjust each

quadrant of the image, adjusting the points in Y whilst leaving the center

point unchanged. This provides a much more accurate geometric

match as a result.

Frame Violation