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Martin Landa 0f46a5c405 imagerylib: include VECT_INC vor 13 Jahren
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Makefile 0f46a5c405 imagerylib: include VECT_INC vor 13 Jahren
README db49180dd7 welcome to GRASS 7.0.svn vor 17 Jahren
alloc.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ vor 17 Jahren
eol.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ vor 17 Jahren
find.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ vor 17 Jahren
fopen.c 98dbc68757 fixed unlucky formatted messages (thanks to Glynn) vor 17 Jahren
georef.c 5ae5d66d61 move polynomial transformation to imagery lib vor 13 Jahren
group.c a927cf1428 use G_getl2(), i18n (merge from devbr6) vor 15 Jahren
iclass.c e1d5fc9103 imagerylib: functions used by wxIClass, based on i.class (co-author V. Petras) vor 13 Jahren
iclass_bands.c e1d5fc9103 imagerylib: functions used by wxIClass, based on i.class (co-author V. Petras) vor 13 Jahren
iclass_local_proto.h e1d5fc9103 imagerylib: functions used by wxIClass, based on i.class (co-author V. Petras) vor 13 Jahren
iclass_perimeter.c 1b5c5cea0b fix compilation without gdal/ogr vor 13 Jahren
iclass_signatures.c e1d5fc9103 imagerylib: functions used by wxIClass, based on i.class (co-author V. Petras) vor 13 Jahren
iclass_statistics.c e1d5fc9103 imagerylib: functions used by wxIClass, based on i.class (co-author V. Petras) vor 13 Jahren
imagerylib.dox bd5fd6b638 doxygen updated vor 16 Jahren
list_gp.c a4f35de12d imagerylib: i18n, message cosmetics vor 16 Jahren
list_subgp.c a4f35de12d imagerylib: i18n, message cosmetics vor 16 Jahren
loc_info.c 3a539ed71b Fix: return the allocated buffer vor 15 Jahren
points.c a927cf1428 use G_getl2(), i18n (merge from devbr6) vor 15 Jahren
ref.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ vor 17 Jahren
sig.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ vor 17 Jahren
sigfile.c 69ac420b2f gislib G__name_is_fully_qualified() renamed to vor 16 Jahren
sigset.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ vor 17 Jahren
sigsetfile.c 0feb21f1f8 imagerylib: fix function name vor 13 Jahren
target.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ vor 17 Jahren
title.c a927cf1428 use G_getl2(), i18n (merge from devbr6) vor 15 Jahren
var.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ vor 17 Jahren

README

To merge 2 signatures

n1 number of points in sig 1
n2 number of points in sig 2

mean1[nbands] means per band for sig 1
mean2[nbands] means per band for sig 2

var1[b1][b2] covariance band 1 with band 2 for sig 1
var2[b1][b2] covariance band 1 with band 2 for sig 2

the meger is

n = n1+n2
mean[b] = (mean1[b]*n1 + mean2[b]*n2)/n

sum1 = var1[b1][b2] * (n1-1) + n1 * mean[b1] * mean[b2];
sum2 = var2[b1][b2] * (n2-1) + n2 * mean[b1] * mean[b2];

var[b1][b2] = (sum1+sum2 - n*mean[b1]*mean[b2) / (n-1)