matlab运行SIFT算法总是出现未定义函数变量？

ubeautqq

未定义函数或变量 "pt11"。

出错 features_matching (line 14)
[B1,IX] = sort(pt11(:,1));

出错 tuxiangpingjie (line 34)
" m. S0 n2 T) ^[pt1,pt2]= features_matching( db, desc2, dist_ratio , pos1 , pos2);

features_matching 程序
function [pt1,pt2] = features_matching( database, desc, dist_ratio , pos1 , pos2 )
num = 1;
6 {& o0 Y) ^9 l' y  lfor k = 1:size(desc,1)
dist = sqrt(sum((database.desc - repmat(desc(k,,size(database.desc,1),1)).^2,2));
) A0 T  s" J8 R0 M[B,IX] = sort(dist);
if B(1)/B(2) >= dist_ratio %nn2_dist >= dist_ratio
idx = 0;
else
0 \1 b* J4 {4 ]pt22(num, = pos2(k,;
pt11(num,:) = pos1(IX(1),:);
$ v( U, W  S' h. p6 E3 Jnum = num + 1;
; }; C" T/ m! l- B' l2 E) Rend
0 \( F" o7 X. iend
. f$ K, D; e& V, L' V/ g" B[B1,IX] = sort(pt11(:,1));
Pt1 = pt11(IX,:);
$ Z9 d5 L8 t+ O$ ^( X. d$ TPt2 = pt22(IX,:);

k = 1;
  n6 U5 \: o! [" o- m" ufor i = 2:num-1
9 R6 J6 [  R  QDist = sqrt((Pt1(i,1) - Pt1(i-1,1))^2 +(Pt1(i,2) - Pt1(i-1,2))^2);
" `2 z/ B9 I$ d2 eif Dist > 3
pt1(k,:) = Pt1(i,:);
: h9 _  z$ k/ k1 n! jpt2(k,:) = Pt2(i,:);
+ h: T8 j, Q) h6 zk = k + 1;
7 L5 a6 Z7 D  M6 A* rend
% y: I, k% j' k5 F6 bend

[B1,IX] = sort(pt2(:,1));
9 |* ^" p! o9 ~' R# q: EPt1 = pt1(IX,:);
% ~, l: [/ K3 g/ {; h/ q9 dPt2 = pt2(IX,:);

  i* A; }& o0 ]) I! vkk = 1;
! E( m) y+ }' H9 }1 A: W* c# Xpt1 = [];
( X! _. x/ Q: upt2 = [];
for i = 2:k-1
& f) w- d2 R5 U- _3 `Dist = sqrt((Pt2(i,1) - Pt2(i-1,1))^2 +(Pt2(i,2) - Pt2(i-1,2))^2);
if Dist > 3
pt1(kk,:) = Pt1(i,:);
4 a3 R8 }8 A/ k+ i4 f0 Opt2(kk,:) = Pt2(i,:);
kk = kk + 1;
0 q) y8 l/ n2 U$ _0 V  ?end
7 o) f+ w- ^" [* f( qend

4 M( H/ y+ ^3 l7 T5 r) y: s

0 h. W/ u5 K: x1 L) b5 Y+ b
$ r2 y' L% K! w5 x5 D, H

littlestupid

好复杂