qccmatrixaddnoisetoregion.3

来自「spiht for linux this is used to decod an」· 3 代码 · 共 62 行

.TH QCCMATRIXADDNOISETOREGION 3 "QCCPACK" ""
.SH NAME
QccMatrixAddNoiseToRegion
\- corrupt region of matrix with random noise
.SH SYNOPSIS
.B #include "libQccPack.h"
.sp
.BI "int QccMatrixAddNoiseToRegion(QccMatrix " matrix ", int " num_rows ", int " num_cols ", int " start_row ", int " start_col ", int " region_num_rows ", int " region_num_cols ", double " noise_variance );
.SH DESCRIPTION
.B QccMatrixAddNoiseToRegion()
adds uniformly-distributed random noise of variance
.I noise_variance
to a rectangular region in
.IR matrix .
.I num_rows
and
.I num_cols
give the dimensions of
.IR matrix ,
.I start_row
and
.I start_row
give the coordinates (within 
.IR matrix )
of the upper-left corner of the region to be corrupted with noise,
and
.I region_num_rows
and
.I region_num_cols
give the size of the noise-corrupted region.
.B QccMatrixAddNoiseToRegion()
will properly handle cases in which the specified rectangular region extends
beyond the boundaries of
.IR matrix .
.LP
The random noise added to
.I matrix
is uniform, has zero mean,
and has variance
.IR noise_variance .
The noise is generated using
.BR QccMathRand (3).
.SH "SEE ALSO"
.BR QccMatrix (3),
.BR QccMathRand (3),
.BR QccPack (3)
.SH AUTHOR
Copyright (C) 1997-2009  James E. Fowler
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