ADAPT

Description

ADAPT generates a pseudocolor table (PCT), which can be used to optimally represent a provided RGB image. The 24-bit image is translated to an 8-bit pseudocolor table using an adaptive PCT algorithm.

Parameters

Name	Type	Length	Value range
Input: Input RGB channels *	Raster port	3 - 3
Output: Output PCT channel	PCT port	0 - 1
PCT Layer Name	String	0 - 1
PCT Layer Description	String	0 - 1
Report	String	0 - 192	See parameter description

* Required parameter

Parameter descriptions

Input: Input RGB channels

Specifies the three 8-bit channels (R, G, B) containing the input raster image.

If R, G, and B are all the same channel number, this is equivalent to specifying a black and white image.

Output: Output PCT channel

Optionally specifies the output pseudocolor table (PCT) channel segment to receive data. If no segment is specified, a new segment is created.

PCT Layer Name

Specifies a name (up to 8 characters) for the output PCT segment.

This value is used only if a new pseudocolor segment is created.

PCT Layer Description

Describes (in up to 64 characters) the contents or origins of the output PCT.

This value is used only if a new pseudocolor segment is created.

Report

Specifies where to direct the generated report.

Available options are:

• LOG: generates a report on the terminal (default)
• <modulename.RPT>: appends a report to the module's RPT file
• DISK: generates a report on file "IMPRPT.LST"

Details

ADAPT creates a pseudocolor table (PCT, segment type 171) using as input three channels (DBIC) representing an RGB (color) image. The 24-bit input image is translated to an 8-bit pseudocolor table using an adaptive PCT algorithm. The PCT may then be used as input to ERRDIFF, which converts an RGB image to a pseudocolored image based on a given PCT.

Input RGB channels (DBIC) must be 8-bit channels, due to the 8-bit nature of a pseudocolor table. While any type of image channel may be used, values are internally converted to 8-bit data. Using non-8-bit data may result in unexpected or poor results.