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Old network
As of Houdini 20.5, use Copernicus nodes instead of Compositing nodes. Though both networks still exist, the Compositing network is now designated as COP Network - Old. The Compositing network and its nodes will be deprecated and then removed in a future Houdini release.
This operation allows you to extract an arbitrary quadrilateral area out of the input image and stretch it to fill the full resolution of the output. It is the opposite of corner pin.
Four points are used to define the desired area of the input image. Image data outside the desired area is discarded.
Scoping ¶
This operation may be restricted to certain planes, or components of planes. In addition, the operation may be applied to a subset of frames within the sequence. An image must have both its frame and plane scoped to be modified.
Images that are not modified are passed through, which does not take any memory or processing time.
Masking ¶
This operation may be masked, which restricts the operation to an area of the image. The mask may be inverted, brightened or dimmed.
The mask input is on the side of the node. The label on the connector indicates the plane being used as a mask.
The mask input can also be scaled to fit the output image’s resolution, if they differ. If this node is changing constantly, and the mask is not, it is somewhat faster to put a Scale COP down to do the resize for the mask image. Otherwise, the scale will occur every time this node cooks.
In the viewport:
-
click or press E (default hotkey) to edit the handles
on the input image. The viewed image will change to that of the
input. -
Adjust the handles by
dragging them to the corners of the
area you wish to unpin. -
You can Alt +
click a handle to select it, or
Alt + drag around handle to select them and move the
selected handles as a group.Alt + click empty space to
deselect the handles. -
click again or press 'e' to return to viewing the output
of this node.
Note
Unpin will be temporarily bypassed while you select the input area. It will automatically un-bypass again when you finish selecting the area.
Parameters ¶
UnPin ¶
Units
Specifies the units of the point coordinates.
Bottom Left, Bottom Right, Top Left, Top Right
The four corner points of the input area.
Filter
The filter to use when scaling the image to fit the new area.
Locals ¶
L
Sequence length
S
Start of sequence
E
End of sequence
IL
Input sequence length
SR
Sequence frame rate
NP
Number of planes in sequence
W,H
Width and height of image
I
Image index (0 at start frame)
IT
Image time (0 at start frame)
AI
Current plane array index
PI
Current plane index
PC
Num of channels in current plane
CXRES
Composite Project X resolution
CYRES
Composite Project Y resolution
CPIXA
Composite Project pixel aspect ratio
CDEPTH
Composite Project raster depth
CBP
Composite Project black point
CWP
Composite Project white point
| See also |
