Martin Landa 5e8d12b3e5 add missing header when compiled without GDAL and PostgreSQL support 11 yıl önce
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Makefile 0f46a5c405 imagerylib: include VECT_INC 13 yıl önce
README db49180dd7 welcome to GRASS 7.0.svn 17 yıl önce
alloc.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ 16 yıl önce
eol.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ 16 yıl önce
find.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ 16 yıl önce
fopen.c 98dbc68757 fixed unlucky formatted messages (thanks to Glynn) 16 yıl önce
georef.c 5ae5d66d61 move polynomial transformation to imagery lib 13 yıl önce
georef_tps.c df20bea26c imagery lib: add thin plate spline coordinate transformation 12 yıl önce
group.c a927cf1428 use G_getl2(), i18n (merge from devbr6) 15 yıl önce
iclass.c 6214629352 iclass backend: make subgroup optional 11 yıl önce
iclass_bands.c e1d5fc9103 imagerylib: functions used by wxIClass, based on i.class (co-author V. Petras) 13 yıl önce
iclass_local_proto.h 08a91ed99f Don't use // comments (C89 compatibility) 12 yıl önce
iclass_perimeter.c 08a91ed99f Don't use // comments (C89 compatibility) 12 yıl önce
iclass_signatures.c 08a91ed99f Don't use // comments (C89 compatibility) 12 yıl önce
iclass_statistics.c a6c86f7b56 imagerylib: avoid the compiler warning (discards 'const' qualifier) by explicit const cast 11 yıl önce
imagerylib.dox bd5fd6b638 doxygen updated 16 yıl önce
iscatt_core.c 5e8d12b3e5 add missing header when compiled without GDAL and PostgreSQL support 11 yıl önce
iscatt_structs.c 5a8bbb7db8 wx.iscatt: c backend 11 yıl önce
list_gp.c a4f35de12d imagerylib: i18n, message cosmetics 16 yıl önce
list_subgp.c 717583d7bf list subgroup: wrong pointer type fix 11 yıl önce
loc_info.c 3a539ed71b Fix: return the allocated buffer 15 yıl önce
points.c a927cf1428 use G_getl2(), i18n (merge from devbr6) 15 yıl önce
ref.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ 16 yıl önce
sig.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ 16 yıl önce
sigfile.c 79ea9c0b06 imagerylib: update signature functions to use G_unqualified_name() 12 yıl önce
sigset.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ 16 yıl önce
sigsetfile.c 79ea9c0b06 imagerylib: update signature functions to use G_unqualified_name() 12 yıl önce
target.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ 16 yıl önce
title.c a927cf1428 use G_getl2(), i18n (merge from devbr6) 15 yıl önce
var.c 8868d4b686 indent -bad -bap -bbb -br -bli0 -bls -cli0 -ncs -fc1 -hnl -i4 \ 16 yıl önce

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)