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APPENDIX A: RELEASE NOTES

Ocula 3.0v1

135

The Foundry

Ocula 2.1v1

• There is a new Image Alignment menu with the following options:

Rectification - This is the default alignment method. The two

images are resampled so that all matching pixels are on the same

horizontal scanline in the second image as they are in the first.

Vertical Alignment - The two images are aligned along the y axis

using a skew, but not moved along the x axis.

None - If the disparity between your stereo views is horizontal

only (corresponding pixels lie on the same scanline in both images),

you can select this option for faster processing. This is the same

as Horizontal Shift Only in previous versions of Ocula.

•The Occlusions menu has been renamed Disparity Method. A third

method, Unconstrained Motion, has been added to the menu. This

calculates the disparity using unconstrained local motion

estimation.

• There is a new Median Filter Size control. Increasing this value

should reduce the noise on the disparity field. This control is only

available when Disparity Method has been set to Normal

Occlusions.

For more information on the new controls, see Controls on page 30.

• O_ColourMatcher

• There is a new Pre-blur Disparity control, which allows you to blur

the incoming disparity map before using it. If the disparity map is

imperfect, this can help to reduce artefacts in the colour

correction.

• In the Block-based Matching Mode, you can now calculate the

colour correction for multiple block sizes and then blend the

results together. This can help to reduce errors and make the

results more temporally consistent. There are controls for the

number of samples (Number of Samples), the maximum block size

to go up to (Max Block Size), the sample spacing (Sample Spacing),

and the method of combining the samples (Colour Correction Type).

• There is a new control, Halo Correct, aimed at reducing the halo

effect you can get around high-contrast edges in the Block-based

Matching mode. Note that where occlusions occur this correction

can introduce artefacts around edges. Another new control,

Occlusion Compensate, is designed to correct these and probably

needs to be tuned to your particular footage.

For more information on the new controls, see Controls on page 51.

•O_VerticalAligner

• If you have a pretracked Nuke stereo camera that describes the

camera setup used to shoot the Source images, you can now use

O_VerticalAligner to analyse the sequence and output a vertically

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