FUSEPCT

Description

FUSEPCT fuses a pseudocolor image with a black-and-white (B/W) intensity image. The result is an output RGB color image with the same resolution as the original B/W intensity image, but where the color (hue and saturation) is derived from the resampled input pseudocolor image.

Parameters

Name	Type	Length	Value range
InputColor: Input pseudocolor image channel  *	Raster port	1 - 1
InputColorPCT: Pseudocolor table segment  *	PCT port	1 - 1
InputIntensity: Input intensity channel *	Raster port	1 - 1
Output: Output raster channels  *	Raster port	3 - 3
Resampling Method	String	0 - 1	Default: NEAR
Fusion Model	String	0 - 1	CYLINDER, HEXCONE Default: CYLINDER

* Required parameter

Parameter descriptions

InputColor: Input pseudocolor image channel

Specifies the input pseudocolor image channel that defines the color (hue and saturation components) for the fused output color image.

The channel must be 8-bit.

InputColorPCT: Pseudocolor table segment

Specifies the pseudocolor table segment (type 121) used for encoding the input image into red, green, and blue components.

InputIntensity: Input intensity channel

Specifies the input black-and-white intensity image that defines the intensity component of the fused output color image.

DBINT (InputIntensity) and DBOC (Output) channels must be all 8-bit or all 32-bit real.

DBINT (InputIntensity) must not be the same as DBOC (Output).

Output: Output raster channels

Specifies three output RGB channels to store the results of the data fusion.

DBIC (InputColor) defines the color, and DBINT (InputIntensity) defines the intensity for the fused output color image.

The channels specified by DBINT (InputIntensity) and DBOC (Output) must be either all 8-bit or all 32-bit real.

The channels specified by this parameter must not be the same as the channel specified by DBINT (InputIntensity).

Duplicate output channels are not allowed.

Resampling Method

Specifies the type of resampling method used on the input RGB color image.

Resampling extracts and interpolates the gray levels from the original pixel locations to corrected locations.

Three resampling modes are supported.

• NEAR (NEAREST): Nearest-neighbor interpolation identifies the gray level of the pixel closest to the specified input coordinates and assigns that value to the output coordinates.
• BILIN (BILINEAR): Bilinear Interpolation determines the gray level from the weighted average of the four closest pixels to the specified input coordinates and assigns that value to the output coordinates.
• CUBIC: Cubic Convolution determines the gray level from the weighted average of the 16 closest pixels to the specified input coordinates and assigns that value to the output coordinates.

The default is NEAR (NEAREST).

Fusion Model

Specifies the type of IHS color model to use. Refer to IHS documentation for more information on these two models.

Details

FUSEPCT performs data fusion of an input pseudocolor image on an input file with a black-and-white intensity image. The result is an output RGB color image with the same resolution as the intensity image. If the input and output files are different, the input pseudocolor image is resampled using the specified resampling method. Either the Hexcone or Cylinder IHS color model is used for data fusion.

FUSEPCT performs data fusion by running the following functions:

• REGPRO resamples and transfers the input pseudocolor image specified by DBIC (InputColor) to the first output channel specified by DBOC (Output).
• IIA transfers the pseudocolor table segment specified by DBPCT (InputColorPCT) from the input file to the output file.
• PCE creates the red, green, and blue components of a color image from the resampled input image and pseudocolor table.
• IHS performs an Intensity-Hue-Saturation transformation on the resampled color image specified by DBOC (Output).
• RGB performs a Red-Green-Blue transformation (the inverse of IHS) using DBINT (InputIntensity) for the intensity channel, and the output of IHS for the hue and saturation channels.