User Guide
Chapter 5: Painting And Image Editing
Control points Click to add control points to both the source and target. Every source
point must have a corresponding target point. At least 3 points must be
defined to enable the Create button.
Control points are saved in relative position to object, so if you drag or
scale an object, the points will be scaled correspondingly. Save the
document after change the control points configuration. When exiting
the session, current point configuration is automatically saved.
Segment points Click to add segments to both the source and target. Every source
segment must have a corresponding target segment.
Curve points Click to add curve segments to both the source and target. Every source
curve must have a corresponding target curve.
End curve points Click to complete the curve.
Select all points Click to select all control points.
Delete Delete has two functions: delete current curve, if you are creating a
curve, or delete selection, if any.
Save Click this button to save the control points within the source and target.
Reload Click this button to reload the saved points.
Pixel resampling Select a resampling method.
Nearest neighbor. Will remove some pixel information from your target
image; however, if used, this setting will be the fastest.
Bilinear. Will use a bilinear interpolation algorithm during
downsampling.
Biquadratic. Estimates the color at a pixel in the destination image by
an average of 9 pixels surrounding the closest corresponding pixel in
the source image.
Bicubic. Estimates the colour at a pixel in the destination image by an
average of 16 pixels surrounding the closest corresponding pixel in the
source image.
Polygonal. Every source pixel is mapped to a polygon in the target.
Auto. Canvas selects the most appropriate method for resampling.
Show Names Select this check box if you want to see labels. Use the Size menu to
adjust the size of control points.
Shape Select either Circle or Square for the control point shape.
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