qcchypimagecubemeansam.3

spiht for linux this is used to decod and encode vedio i wich all enjoy

.TH QCCHYPIMAGECUBEMEANSAM 3 "QCCPACK" ""
.SH NAME
QccHYPImageCubeMeanSAM
\- calculate the mean SAM between two image cubes
.SH SYNOPSIS
.B #include "libQccPack.h"
.sp
.BI "double QccHYPImageCubeMeanSAM(const QccIMGImageCube *" image_cube1 ", const QccIMGImageCube *" image_cube2 );
.SH DESCRIPTION
.BR QccHYPImageCubeMeanSAM()
calculates the mean spectral angle mapper (SAM) between 
.IR image_cube1
and
.IR image_cube2 .
Both
.IR image_cube1
and
.IR image_cube2
must have the same size.
.LP
In hyperspectral terminology, the SAM is simply the angle between two pixel
vectors.
.IR image_cube1
and
.IR image_cube2 
are considered to be 2D arrays of spectral pixel vectors, where the
vectors have dimension
.IR image_cube1->num_frames .
.BR QccVectorAngle (3)
is used to calculate the angle, in degrees, between a pixel vector from
.IR image_cube1
and the corresponding pixel vector in 
.IR image_cube2 .
These angles are averaged over the entire dataset
and the value of the mean angle returned.
.SH "RETURN VALUE"
This routine returns the mean SAM in degrees.
If the image cubes do not have the same size, 0.0 is returned.
.SH "SEE ALSO"
.BR QccPackHYP (3),
.BR QccVectorAngle (3),
.BR QccIMGImageCube (3),
.BR QccPack (3)
.SH AUTHOR
Copyright (C) 1997-2009  James E. Fowler
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