TYPE: COP
TITLE: Lookup COP

This operation applies a lookup table to the input, from either a LookUp Table
(LUT) file, a CHOP channel or a second input map.

The second input defines the lookup table when the LUT source is Input Row or
Input Column. One row or column is taken as the lookup table. The lookup map
is evaluated at U or V position specified by the input pixel value (0-1). Any
input values below 0 or above 1 are clamped to 0 or 1. The first plane is
always used as the lookup table, and if it has multiple components, they are
applied to the appropriate components in the output. The map is not
interpolated, so small maps can be used to quantize the image.

This is a collapsible pixel operation when the LUT source is a LUT file or 
CHOP. Middle click on the dialog '?' help for more help on maskable pixel 
operations.

Parameters
Lookup
    LUT Source        - The lookup table applied can be sourced from a 
			CHOP channel, a LUT file or a row or column of the
			second input.
    LUT File          - The LUT file to load and apply.
    CHOP 	      - The CHOP path to fetch the LUT from.
    Row/Col Position  - The U or V coordinate of the row or column in the
			input image which represents the lookup table.

Quantize, Mask & Plane Scope, Frame Scope
    Overview - See extra help (Middle click on the dialog '?' help).

Local Variables:
    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
