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)
9 s9 q- O" w6 \  m( T6 M3 v[B1,IX] = sort(pt11(:,1));

出错 tuxiangpingjie (line 34)
; e7 j* Z( H5 F0 R$ E6 n0 t6 h[pt1,pt2]= features_matching( db, desc2, dist_ratio , pos1 , pos2);

features_matching 程序
. \( U& ~% E1 I. c1 K& c* T3 Q) _6 X9 zfunction [pt1,pt2] = features_matching( database, desc, dist_ratio , pos1 , pos2 )
num = 1;
for k = 1:size(desc,1)
4 v) b+ N! E0 N. y% K& j7 fdist = sqrt(sum((database.desc - repmat(desc(k,,size(database.desc,1),1)).^2,2));
+ X/ ?( M2 \/ ~( \, b7 O1 _[B,IX] = sort(dist);
if B(1)/B(2) >= dist_ratio %nn2_dist >= dist_ratio
idx = 0;
7 ~! O. f) O1 h: ~8 w  V$ \else
$ s1 a) W$ l  U% E" Mpt22(num, = pos2(k,;
0 b: L5 D+ w6 T! \pt11(num,:) = pos1(IX(1),:);
num = num + 1;
: [# ~9 {) b5 j4 S- {end
end
[B1,IX] = sort(pt11(:,1));
Pt1 = pt11(IX,:);
Pt2 = pt22(IX,:);

k = 1;
9 I2 S$ `4 C6 G& e) }for i = 2:num-1
5 J) x& Y4 U9 gDist = sqrt((Pt1(i,1) - Pt1(i-1,1))^2 +(Pt1(i,2) - Pt1(i-1,2))^2);
if Dist > 3
pt1(k,:) = Pt1(i,:);
1 w( b) p8 f( Z& r' c+ R3 f5 mpt2(k,:) = Pt2(i,:);
2 e" U- u) e* K: Rk = k + 1;
7 R- Y; a* G- ?5 N0 ^( mend
; k( D! u5 b8 B( ?# Qend

[B1,IX] = sort(pt2(:,1));
Pt1 = pt1(IX,:);
Pt2 = pt2(IX,:);
( a* R! h. n+ A: b
( ~8 n  A7 C. g- xkk = 1;
( I: n3 |/ h2 K9 a3 k( l8 Wpt1 = [];
pt2 = [];
for i = 2:k-1
Dist = sqrt((Pt2(i,1) - Pt2(i-1,1))^2 +(Pt2(i,2) - Pt2(i-1,2))^2);
( J" O5 A) x1 o) rif Dist > 3
pt1(kk,:) = Pt1(i,:);
; \4 w8 t& K/ Rpt2(kk,:) = Pt2(i,:);
kk = kk + 1;
2 u0 B. F" h1 S+ I  @4 Pend
end

3 K- o* o& e$ Y; ]7 U1 r1 ]( e- K+ ^

& J3 I) ?) f9 R6 v8 _
  L* x! K; X' ~! y& `( w. W

littlestupid

好复杂