UM:Lens Distort

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Lens Distort

ch-effects-lens-distort-overview

 

The Lens Distort tool can fix and undo camera lens distortion.

 

dv_note

A number of presets are included for various GoPro cameras.

Presets

ch-effects-lens-distort-presets

 

Presets are predefined settings organised as easy to apply button actions. A preset exists for some commonly used GoPro camera formats e.g. GoPro Hero at 1280x960 etc.

 

ch-effects-lens-distort-presets-all

 

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Each preset will set up the Distort parameters described below.

Unity

This removes all correction and disables Lens Distort.

 

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The Distort parameter is changed from Remove Distortion to Off.

GoPro Hero 1920x1080

This preset is the tool default.

 

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This means that when we reset the tool, it resets to the default value as per the GoPro Hero 1920x1080 preset.

Distort Parameters

ch-effects-lens-distort-distort

 

ch-effects-lens-distort-distort-all

Application

ch-effects-lens-distort-distort-remove-distortion

 

ch-effects-lens-distort-distort-dropdownl

 

Choose to disable tool, add or remove distortion. The default is Remove Distortion.

 

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The Off setting (tool disabled) is equivalent to the Unity preset.

Amount

ch-effects-lens-distort-distort-amount

 

The amount of correction to apply (strength).

Radius

ch-effects-lens-distort-distort-radius

 

The Radius determines the distance before we see distortion.

Scale

ch-effects-lens-distort-distort-scale

 

This scales the source image from its center.

Center X/ Center Y

ch-effects-lens-distort-distort-center-x-y

 

The center point of the distortion. Default to image center point.

A1 A2 A3 / B1 B2

ch-effects-lens-distort-distort-coefficients

 

These define the lens distortion coefficents.

 

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A1 deals with the major "fish-eye" style distortion while A2 and A3 are more distant, edge distortion. B1 and B2 deal with distortion considered as pans in Z space (or up and down).

Channels

ch-warper-channels

 

Values :

RGB , R , G , B

Default :

RGB

 

Correct distortion in a single RGB channel or (by default) all three.

 

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