MATLAB图像处理命令集汇

geronimo123

1.applylut
' n7 b. z* z6 P/ I5 [功能:
' L1 c1 X$ x" d: O0 u在二进制图像中利用lookup表进行边沿操作.
语法:
A = applylut(BW,lut)
举例
6 ^3 y, e# ~- Z: k$ C* }( [lut = makelut('sum(x( : )) == 4 ',2);
, A% }' i% ]  W" _/ ]BW1 = imread('text.tif');
BW2 = applylut(BW1,lut);
imshow(BW1)
0 e  ]8 u2 R1 ~. vfigure, imshow(BW2)
* W) L1 i% i) y) Z) `: A# d( y相关命令:
. F  j. S9 ^! T3 i* K& Cmakelut
5 K0 U0 p+ o8 c3 S/ T  }! e- o7 a2 L
. C0 g$ z9 b$ G
! A) M8 U$ L$ n5 Q& R2.bestblk
功能:
! C5 i5 f7 D( s% ~1 S* W确定进行块操作的块大小.
- v: N4 \5 L5 D% K语法:
" X1 ^; L, ]! r: X0 q0 {siz = bestblk([m n],k)
- o  A0 S+ o: q1 f" l[mb,nb] = bestblk([m n],k)
举例
siz = bestblk([640 800],72)
siz =
# T3 s/ s5 _" r; `( I8 w64 50
- x) b- D: }2 ^) l. ]0 s相关命令:
blkproc


6 [  S# I8 D" E1 v, M, @0 l3.blkproc
& Q1 ~1 i+ ?5 W8 Y功能:
MATLAB高级应用——图形及影像处理 320
2 c, n" l# B6 N- G+ E1 _2 n  P5 f实现图像的显式块操作.
6 C1 r3 n9 i. Y& M! W. w语法:
8 I6 `' J' `) Z$ n& X6 S. `B = blkproc(A,[m n],fun)
B = blkproc(A,[m n],fun,P1,P2,...)
/ t) E; f! m7 r9 {B = blkproc(A,[m n],[mborder nborder],fun,...)
& z6 ~9 }1 ^8 o6 l2 E* }. zB = blkproc(A,'indexed',...)
举例
I = imread('alumgrns.tif');
' ?" ~3 z  n& x! p. y* a' }I2 = blkproc(I,[8 8],'std2(x)*ones(size(x))');
, L. t1 b# @% _imshow(I)
0 R/ r+ ]( o! Yfigure, imshow(I2,[]);
相关命令:
colfilt, nlfilter,inline

: u& ?/ a9 O* w  \4 t
% n1 m+ o9 L7 ~  p8 W5 B0 V4.brighten
2 a- n# O) w7 k7 N1 e2 d6 S功能:
增加或降低颜色映像表的亮度.
语法:
) E) _: Y6 O% G* K0 |4 vbrighten(beta)
newmap = brighten(beta)
  b0 _9 S' T- L' j2 H6 U6 Inewmap = brighten(map,beta)
0 y, a" g* Q8 \9 m8 F% y( t- h% nbrighten(fig,beta)
相关命令:
imadjust, rgbplot
  ^! E3 @. R, o4 e6 ?! N: F

" }: W; ?, w7 `/ u- `" h* G9 q5.bwarea
功能:
( d- D8 b/ q8 z) a计算二进制图像对象的面积.
7 e$ @: h) l6 e! V/ T& p! u: Q语法:
% D9 |" I& Y2 `# R; T6 Mtotal = bwarea(BW)
举例
BW = imread('circles.tif');
, z. g) `* o/ ^) ]+ s4 timshow(BW);
附录 MATLAB图像处理命令 321
bwarea(BW)
ans =
# r6 F- u5 [7 Z/ z% N, _15799
相关命令:
& ^0 {: A/ }$ T- j7 |$ p# {bweuler, bwperim

# d0 c9 f7 a* D& U% o+ h  y
& G. i, q" E) S: L0 H6.bweuler.
功能:
计算二进制图像的欧拉数.
语法:
) ?" j( ~* J+ Z2 ^2 S9 Deul = bweuler(BW,n)
  @; y* w& p- b$ O' B7 Y" z1 U举例
BW = imread('circles.tif');
imshow(BW);
bweuler(BW)
ans =
-2
) a# i- W  t0 _- ~4 e! x+ W相关命令:
bwmorph, bwperim


7 c! k& s% C: E$ V7.bwfill
, y7 Q1 [9 e  _) H. _* t6 A& N" f功能:
填充二进制图像的背景色.
8 [6 J2 a- d% S+ D' U3 Y' z: f语法:
+ g" u, z% O3 i( V9 ]BW2 = bwfill(BW1,c,r,n)
3 _- R9 q, l- g* `8 L1 W" J& OBW2 = bwfill(BW1,n)
[BW2,idx] = bwfill(...)
7 g1 w0 I) t3 ]# U0 _) qBW2 = bwfill(x,y,BW1,xi,yi,n)
[x,y,BW2,idx,xi,yi] = bwfill(...)
BW2 = bwfill(BW1,'holes',n)
[BW2,idx] = bwfill(BW1,'holes',n)
3 P2 h& }) j! c* ^举例
; A' y( O( u# T0 {; L! d+ eMATLAB高级应用——图形及影像处理 322
' ^' Z1 ^# v& q6 N5 S; L" w9 pBW1 =[1 0 0 0 0 0 0 0
1 c" c! |1 P: J  A2 F* R5 a1 1 1 1 1 0 0 0
1 0 0 0 1 0 1 0
. v. l: L$ q  T) B1 0 0 0 1 1 1 0
1 1 1 1 0 1 1 1
  m3 D" Q: {5 X, P/ i1 0 0 1 1 0 1 0
5 U+ L. e9 T3 D7 A) }' a. ^1 g1 0 0 0 1 0 1 0
  A; ?: E( ?6 Z% `: _4 V0 b
0 n' K  `" p" y" a# _, NBW2 = bwfill(BW1,3,3,8)
! ^7 H, t8 K  w( x) kBW2 =
1 0 0 0 0 0 0 0
1 1 1 1 1 0 0 0
1 1 1 1 1 0 1 0
6 t& E' P% y3 y" M" }1 1 1 1 1 1 1 0
1 1 1 1 0 1 1 1
+ N! r" e( M; w' k( I  u1 0 0 1 1 0 1 0
; K, R& ]2 M' c" n# Y1 0 0 0 1 0 1 0
1 0 0 0 1 1 1 0
7 N0 |9 u5 A+ a0 o; lI = imread('blood1.tif');
; V! w% e) C  N+ o! F9 @  EBW3 = ~im2bw(I);
BW4 = bwfill(BW3,'holes');
imshow(BW3)
figure, imshow(BW4)
相关命令:
bwselect, roifill
9 U1 O6 m& f$ P& j

8.bwlabel
6 _3 [! E7 ?4 [功能:
/ [/ D6 o* p; Q; g标注二进制图像中已连接的部分.
! C% I9 f/ Q& z/ u- E语法:
& F2 S% k% Z/ P9 q6 x  Y附录 MATLAB图像处理命令 323
L = bwlabel(BW,n)
# G3 ^! U  \3 r5 k  M# `+ v[L,num] = bwlabel(BW,n)
' e- _0 m% ^% d, |, L举例
BW = [1 1 1 0 0 0 0 0
1 1 1 0 1 1 0 0
1 1 1 0 1 1 0 0
- ?6 K2 a$ n" n5 R# {+ h1 1 1 0 0 0 1 0
1 1 1 0 0 0 1 0
1 1 1 0 0 0 1 0
3 I- u; |, H' @. [( E! ?4 c. O1 1 1 0 0 1 1 0
; h3 s) n# i5 m$ Z5 @
2 n/ ]! B( v. g$ e# m/ eL = bwlabel(BW,4)
L =
1 1 1 0 0 0 0 0
1 1 1 0 2 2 0 0
1 1 1 0 2 2 0 0
, {8 m5 P- e3 H4 l' X1 1 1 0 0 0 3 0
9 c& h: A. ?8 @5 W' Z/ E1 1 1 0 0 0 3 0
, I6 g$ C7 P' y; w0 V/ W1 1 1 0 0 0 3 0
/ s4 W6 e4 J/ M3 X( p1 1 1 0 0 3 3 0
- X( p0 V% ~6 B: W! T1 1 1 0 0 0 0 0
[r,c] = find(L==2);
& G: ?, e. f  L' U  |& y; Zrc = [r c]
rc =
. i& ~& v3 P) I0 J2 5
+ ~  U# a+ H5 |* q3 5
2 6
3 6
! P! o& d# r- I! [相关命令:
bweuler, bwselect


9.bwmorph
4 d- W  @2 V7 A. g! [( N9 ]功能:
5 S" X- z5 `& }提取二进制图像的轮廓.
! B2 H3 Z' z3 Q3 s6 o& F语法:
- l* U! w: A4 E* t8 l& V1 WBW2 = bwmorph(BW1,operation)
BW2 = bwmorph(BW1,operation,n)
3 w4 G" j2 V4 D* T8 x4 G举例
6 c0 ~- h7 L. Y7 qBW1 = imread('circles.tif');
MATLAB高级应用——图形及影像处理 324
imshow(BW1);
+ h  p8 }4 ?; b& [3 JBW2 = bwmorph(BW1,'remove');
BW3 = bwmorph(BW1,'skel',Inf);
imshow(BW2)
. g! F+ L9 Y5 @& F2 h( w0 cfigure, imshow(BW3)
相关命令:
bweuler, bwperim, dilate, erode
2 J. Q1 m8 W2 \4 i4 s, c9 J2 |

$ q; w$ _+ v/ s10.bwperim
. p  M8 t) h- X  @9 O) X1 u功能:
计算二进制图像中对象的周长.
语法:
BW2 = bwperim(BW1,n)
; \4 r0 F0 V+ M# s) S# A举例
BW1 = imread('circbw.tif');
8 w4 T3 l7 C3 n+ m$ O" M2 R" w; s1 FBW2 = bwperim(BW1,8);
6 I7 B  _0 E' O' limshow(BW1)
figure, imshow(BW2)
附录 MATLAB图像处理命令 325
相关命令:
bwarea, bweuler, bwfill
1 D3 {$ b' m' v6 k1 w- S" w; H
: |. k" ~% F' h1 R6 q
% @0 n1 o; x' M1 O4 F" f% b11.bwselect
功能:
在二进制图像中选择对象.
语法:
BW2 = bwselect(BW1,c,r,n)
, p0 @: T$ i" k1 B; [1 _, XBW2 = bwselect(BW1,n)
9 ~4 G& q1 r* l[BW2,idx] = bwselect(...)
2 d2 @. O7 _) B8 Z0 j. V( p5 F0 k& L举例
BW1 = imread('text.tif');
c = [16 90 144];
r = [85 197 247];
BW2 = bwselect(BW1,c,r,4);
/ R" u; A: ?# D  V* k( bimshow(BW1)
* j# U7 f$ h# @$ G2 s( l! ~figure, imshow(BW2)
7 G/ J5 B, B" z: K; ~+ A- C相关命令:
' u0 v: A# y9 S% n. q* P5 r( |bwfill, bwlabel, impixel, roipoly, roifill

. W$ Q3 N7 K% p3 t! K
12.cmpermute
MATLAB高级应用——图形及影像处理 326
功能:
' ~* Q7 \: {* c, @调整颜色映像表中的颜色.
* Y& Y+ j: j0 z' Q语法:
! s* b$ ?; z" k9 m2 S+ ?[Y,newmap] = cmpermute(X,map)
: K7 d5 i, N1 m# H% P) ~- l[Y,newmap] = cmpermute(X,map,index)
, s& A7 q) {7 F, o# K, w举例
To order a colormap by luminance, use:
" p/ v0 @% i$ }1 Y- S% Q7 Kntsc = rgb2ntsc(map);
[dum,index] = sort(ntsc(:,1));
[Y,newmap] = cmpermute(X,map,index);
相关命令:
  v+ h# @* r0 b) m* ^randperm


13.cmunique
功能:
查找颜色映像表中特定的颜色及相应的图像.
& L' U& }5 t  \1 j6 T. n语法:
: K, l  p$ r& \8 x4 O. p$ s[Y,newmap] = cmunique(X,map)
$ {9 y. q4 d/ R- T  N[Y,newmap] = cmunique(RGB)
[Y,newmap] = cmunique(I)
相关命令:
4 [0 }( M3 J& X* B3 q! U( mgray2ind, rgb2ind
1 R+ D. M" {9 K$ q

6 X+ v' d; d  w14.col2im
功能:
! R* y  V; ^6 i$ S  }) `将矩阵的列重新组织到块中.
语法:
) M1 u/ o' s7 [$ g3 l; j8 XA = col2im(B,[m n],[mm nn],block_type)
% a4 l5 Y1 c, A' N/ _A = col2im(B,[m n],[mm nn])
: B0 b4 o8 @" E1 x7 Z2 j相关命令:
blkproc, colfilt, im2col, nlfilter
/ B" h$ \- ~! T* r2 W* W

' f! D/ w# V+ s1 r- O" n# O15.colfilt
功能:
4 F5 d2 O/ k* i* C利用列相关函数进行边沿操作.
语法:
B = colfilt(A,[m n],block_type,fun)
B = colfilt(A,[m n],block_type,fun,P1,P2,...)
B = colfilt(A,[m n],[mblock nblock],block_type,fun,...)
5 ^  m! U: m$ n. w1 Z9 tB = colfilt(A,'indexed',...)
# J$ w1 B- v% I- V3 O. O附录 MATLAB图像处理命令 327
0 Y4 b; _% q* g' i相关命令:
9 @5 u4 I  k/ L% }7 _, iblkproc, col2im, im2col, nlfilter

) b; D- t* `+ K1 \. N
+ h* U# d: j5 G4 Q. i( ?5 T16.colorbar
功能:
显示颜色条.
3 Z0 M% J% p/ V6 d" N语法:
colorbar('vert')
colorbar('horiz')
colorbar(h)
  `. @" C: E0 f2 Hcolorbar
2 k% ~8 r7 n6 mh = colorbar(...)
0 k! U0 W  n! u( \举例
I = imread('blood1.tif');
, j, i( z0 e- ~) r" V0 C4 Z3 oh = fspecial('log');
( y# h6 J3 @6 ?  V! I* f9 JI2 = filter2(h,I);
0 e( f+ S5 g8 ?8 rimshow(I2,[]), colormap(jet(64)), colorbar
2 Z1 ?5 G2 ?. c9 \
1 y- n3 m$ N& N, B, l1 s! ~  H
17.conv2
% [% R. N" Z0 k2 X* L) \功能:
进行二维卷积操作.
" `, v/ d5 Q4 @$ N2 j# c语法:
$ E  @$ s+ q, |* CC = conv2(A,B)
1 w$ L0 E% {7 C! BC = conv2(hcol,hrow,A)
! K, b8 p0 V5 g+ {# e. ~C = conv2(...,shape)
, ?; }5 Q! l) g2 d# w举例
A = magic(5)
A =
17 24 1 8 15
: ^5 Y! Y6 p" K; Q- @* \1 R23 5 7 14 16
2 x( b; k  ?4 H4 Y) g4 6 13 20 22
MATLAB高级应用——图形及影像处理 328
1 c, W' M/ T# T/ N10 12 19 21 3
11 18 25 2 9
# J( G$ g; l4 q" TB = [1 2 1;0 2 0;3 1 3]
B =
% f6 ~! |* R/ b) [) y/ C1 2 1
7 {9 q% ^9 u! S7 h0 2 0
) _! u, t0 W3 c3 v3 1 3
C = conv2(A,B)
C =
17 58 66 34 32 38 15
23 85 88 35 67 76 16
55 149 117 163 159 135 67
* d# I* f6 |  i8 T3 N! }+ W% o79 78 160 161 187 129 51
23 82 153 199 205 108 75
30 68 135 168 91 84 9
33 65 126 85 104 15 27
相关命令:
* Y7 x' N* G5 T5 }$ y: q) gfilter2
' T' A, C9 }8 t& Z! G; ]

# l  N! `& w1 [) r  c18.convmtx2
功能:
计算二维卷积矩阵.
( b4 [# n5 h+ R: D' ], R语法:
T = convmtx2(H,m,n)
  v6 S2 k' o. a5 n" `( y  tT = convmtx2(H,[m n])
相关命令:
& k  k6 t' v! S1 S+ ~7 E& kconv2
& {! |$ h( g0 |* W6 w
# `/ r4 y* l$ ~& ~. f( @  H
' N  z0 H- Z' @! e19.convn
- o& ?. l" H8 x. @. t功能: 计算n维卷积.
语法:
3 G; r5 U6 x4 s, SC = convn(A,B)
. g; B+ q' L2 J$ s+ H) bC = convn(A,B,shape)
相关命令:
conv2
+ l9 A( }: O& |/ S0 n+ r

  w/ ?* t( K* p4 @3 ~% y- k' Z20.corr2
! y+ n+ Y# d9 S4 \' S* T6 d功能:
计算两个矩阵的二维相关系数.
: v% q: [4 T' H; K' q附录 MATLAB图像处理命令 329
语法:
r = corr2(A,B)
相关命令:
std2


+ w3 x8 V6 n4 o. Z  M21.dct2
功能:
进行二维离散余弦变换.
( {3 G" t. q2 G9 Z* i- |! P语法:
B = dct2(A)
B = dct2(A,m,n)
B = dct2(A,[m n])
* O6 l8 w1 o7 h5 u4 s) i) l" B举例
RGB = imread('autumn.tif');
I = rgb2gray(RGB);
5 h1 `+ d8 s9 Y' B; z. RJ = dct2(I);
5 l) ]# D6 B/ X8 N( Nimshow(log(abs(J)),[]), colormap(jet(64)), colorbar
J(abs(J) < 10) = 0;
K = idct2(J)/255;
imshow(K)
) A( Y: x4 k3 }# A相关命令:
fft2, idct2, ifft2
: H! P4 U* I" h& y3 x3 w2 M

nevadaooo

很实用的说

modengxian111

收了收了

modengxian111

还有示例，不错不错

DOUDOU斗

很有用的内容，谢谢楼主分享