FUSE

Description

The FUSE function fuses a Red-Green-Blue (RGB) color 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 RGB image. FUSE uses the REGPRO, IHS, and RGB functions to perform the data fusion.

Parameters

Name	Type	Length	Value range
InputIntensity: Input intensity channel *	Raster port	1 - 1
InputR: Input red layer *	Raster port	1 - 1
InputG: Input green layer *	Raster port	1 - 1
InputB: Input blue layer *	Raster port	1 - 1
OutputFUSE: Output raster channels  *	Raster port	3 - 3
Resample Mode	String	0 - 1	Default: NEAR
IHS Model	String	0 - 1	CYLINDER, HEXCONE Default: CYLINDER

* Required parameter

Parameter descriptions

InputIntensity: Input intensity channel

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

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

The channel specified by this parameter must not be the same as that specified by DBOC (OutputFUSE).

InputR: Input red layer

Specifies the layer to be interpreted as the red component of the input RGB color image.

InputG: Input green layer

Specifies the layer to be interpreted as the green component of the input RGB color image.

InputB: Input blue layer

Specifies the layer to be interpreted as the blue component of the input RGB color image.

OutputFUSE: Output raster channels

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

The InputR, InputG, and InputB ports define the color, and the InputIntensity port defines the intensity for the fused output color image.

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

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

Duplicate output channels are NOT allowed.

Resample Mode

Specifies the type of resampling method used on the input RGB 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 value is NEAR (NEAREST).

Cubic Convolution (CUBIC) is the recommended resampling method.

IHS Model

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

Details

FUSE performs data fusion of an input RGB color 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 RGB color image is resampled using the specified resampling method. Either the Hexcone or Cylinder IHS color model is used for data fusion.

FUSE performs data fusion by running the following algorithms:

• REGPRO resamples and transfers the input RGB color image specified by DBRGB (InputR, InputG, and InputB) to the output channels specified by DBOC(OutputFUSE).
• IHS performs an Intensity-Hue-Saturation transformation on the resampled RGB color image specified by DBOC (OutputFUSE).
• 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.