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)
[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 )
* H6 ~. `9 w( znum = 1;
0 ^$ P9 `, N8 f" z) u: Hfor k = 1:size(desc,1)
& F% R2 K# q1 K  j. F! x% @8 F( }dist = sqrt(sum((database.desc - repmat(desc(k,,size(database.desc,1),1)).^2,2));
[B,IX] = sort(dist);
if B(1)/B(2) >= dist_ratio %nn2_dist >= dist_ratio
idx = 0;
$ e  ]# ~- T4 F3 L( Relse
pt22(num, = pos2(k,;
  I# m. b' A: a' tpt11(num,:) = pos1(IX(1),:);
6 T. C; k" d% n& @num = num + 1;
( q$ [+ N- L4 u  Fend
9 [! o4 G. _2 Qend
8 Q3 \+ N/ X- A+ y[B1,IX] = sort(pt11(:,1));
% a% I4 x! b2 A# J: lPt1 = pt11(IX,:);
; L( q9 t+ r( w8 u1 D8 c- h, u2 XPt2 = pt22(IX,:);
+ \, ?5 y; |* s) p- g
$ b, W8 b+ z) X% n1 ek = 1;
for i = 2:num-1
) S- X. x* H8 J6 w2 |0 TDist = sqrt((Pt1(i,1) - Pt1(i-1,1))^2 +(Pt1(i,2) - Pt1(i-1,2))^2);
  w% w" M3 M4 G9 {8 d5 Zif Dist > 3
pt1(k,:) = Pt1(i,:);
pt2(k,:) = Pt2(i,:);
/ t- Y9 E# Q. R) qk = k + 1;
' J) h) K4 U9 `5 G6 v7 M3 zend
end

[B1,IX] = sort(pt2(:,1));
Pt1 = pt1(IX,:);
( ], Q( I% w1 T/ O4 S1 OPt2 = pt2(IX,:);
( o4 ^* {& ~% Y( M
kk = 1;
pt1 = [];
) d+ N; a; `6 u) Bpt2 = [];
. f( j. @. o7 Q0 n. k0 t) E% ^' P, u, hfor i = 2:k-1
Dist = sqrt((Pt2(i,1) - Pt2(i-1,1))^2 +(Pt2(i,2) - Pt2(i-1,2))^2);
, M; A" T* ^, _9 Tif Dist > 3
' _5 U2 h5 u: E) Z  v/ ?: z* Gpt1(kk,:) = Pt1(i,:);
pt2(kk,:) = Pt2(i,:);
kk = kk + 1;
end
end

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littlestupid

好复杂