MATLAB图像处理命令集汇

geronimo123

1.applylut
功能:
在二进制图像中利用lookup表进行边沿操作.
语法:
$ z6 v- u  {& C$ ^# A8 C# D+ v7 U( JA = applylut(BW,lut)
举例
lut = makelut('sum(x( : )) == 4 ',2);
BW1 = imread('text.tif');
BW2 = applylut(BW1,lut);
. P+ I. d8 h1 h3 v4 W  I+ gimshow(BW1)
# r2 L0 J  I( Q; qfigure, imshow(BW2)
4 o. n3 M) A7 w* {! {9 |' b相关命令:
makelut
  g; E5 ~: ]" w2 h3 g5 G/ z

' h1 I  r, H; u9 E2.bestblk
功能:
确定进行块操作的块大小.
4 a, \) s% {& U: U8 R语法:
' q6 i" {2 m0 j( y* Q. rsiz = bestblk([m n],k)
6 M8 B- E) q: K* n) C9 o/ N[mb,nb] = bestblk([m n],k)
举例
% V7 U% g) @) R" \siz = bestblk([640 800],72)
! B$ M6 A1 x7 W- Q0 X, {/ Wsiz =
64 50
: t  ^) M) D+ B8 `: U* p5 i相关命令:
  a  b' i" k; p+ D9 _$ s0 O1 o8 S6 a9 Wblkproc
8 \' e  {% e$ U( Q& j# t

3.blkproc
功能:
" N6 u7 |7 Q. V- X7 d! k0 jMATLAB高级应用——图形及影像处理 320
实现图像的显式块操作.
. K! Q( R8 X1 @/ E) r% I  z4 r语法:
B = blkproc(A,[m n],fun)
  T/ w, _0 J7 _3 z) H. d2 L) U9 S3 H1 yB = blkproc(A,[m n],fun,P1,P2,...)
& _; Z) K4 n; I" uB = blkproc(A,[m n],[mborder nborder],fun,...)
B = blkproc(A,'indexed',...)
3 m" h7 L3 I, d, z% ?7 H举例
" ]9 T2 C3 Q4 X5 c1 Z. |I = imread('alumgrns.tif');
I2 = blkproc(I,[8 8],'std2(x)*ones(size(x))');
imshow(I)
figure, imshow(I2,[]);
, I8 E' m5 J! G/ [1 @$ M相关命令:
colfilt, nlfilter,inline


4.brighten
* `$ }4 z/ S6 y! q$ j2 v$ y$ o功能:
9 P5 e6 b3 s! Z- _增加或降低颜色映像表的亮度.
9 R4 A( E# g8 n- `- v+ m0 g" U语法:
1 G% l( ?. i+ c( I$ c  pbrighten(beta)
$ N: h* g9 j, ^( P2 Tnewmap = brighten(beta)
newmap = brighten(map,beta)
brighten(fig,beta)
相关命令:
imadjust, rgbplot
  ^8 B3 w2 ~$ d6 k! R& d+ E& e( K
( T$ l) q0 B. B) _" g' L5 u, v
$ k, v% Q* B% ~+ F+ }# @# V+ j4 l5.bwarea
8 B4 E/ P8 Z3 `功能:
+ _) E2 m. B' T, `4 t8 ?  t1 N计算二进制图像对象的面积.
! F0 a/ _; g. U! Q4 V" r语法:
" V. \; `& g8 k. c* v) G$ _9 ]total = bwarea(BW)
' a8 q9 F$ Z) m6 C9 Q& o' q6 L6 r举例
BW = imread('circles.tif');
imshow(BW);
附录 MATLAB图像处理命令 321
bwarea(BW)
1 s9 G9 u6 y7 B2 d. v) W7 S) Cans =
! H% L& d& m" w* v+ T4 A+ b$ R15799
相关命令:
3 f2 O+ x0 l) E: l/ vbweuler, bwperim
2 h% m3 Y6 A  C0 K

6.bweuler.
功能:
计算二进制图像的欧拉数.
语法:
5 Z% u0 `' u8 f% u. V' }' heul = bweuler(BW,n)
% `) Q: t" b- \9 I举例
BW = imread('circles.tif');
imshow(BW);
bweuler(BW)
9 c9 Q/ R1 |4 U' Jans =
-2
' Y- E  w6 q1 W" {' ?* P& d) n+ u# H4 m相关命令:
bwmorph, bwperim
. K4 z5 ?( M5 r* _. X0 h3 j
* s9 ?5 u! p/ U3 Q6 w
! x: L# d: D( Z' ?, ^2 @7.bwfill
; A# `5 F9 L4 ~功能:
# m! d, L8 g) _# ?/ @; P+ j填充二进制图像的背景色.
3 l5 }$ o: [8 D' ^3 s语法:
BW2 = bwfill(BW1,c,r,n)
BW2 = bwfill(BW1,n)
0 N5 a* S% m: S* D2 X$ r[BW2,idx] = bwfill(...)
BW2 = bwfill(x,y,BW1,xi,yi,n)
[x,y,BW2,idx,xi,yi] = bwfill(...)
; ~/ e& n! U- p& R0 jBW2 = bwfill(BW1,'holes',n)
[BW2,idx] = bwfill(BW1,'holes',n)
! F4 |* P% e( B2 M# h7 B举例
! n0 {$ V; |( G, Q% g1 gMATLAB高级应用——图形及影像处理 322
. p' G, s) N! b4 ~6 XBW1 =[1 0 0 0 0 0 0 0
3 u0 ~5 H8 ~7 `# m: p. ~1 1 1 1 1 0 0 0
7 L' o* H0 x$ m: H8 R3 ~1 0 0 0 1 0 1 0
1 0 0 0 1 1 1 0
# c* z* w' H+ a- e- V/ e9 L1 1 1 1 0 1 1 1
1 0 0 1 1 0 1 0
3 @4 Q( L6 s! D) \1 0 0 0 1 0 1 0

6 X2 ^- @+ ^& `, l/ @* lBW2 = bwfill(BW1,3,3,8)
BW2 =
1 0 0 0 0 0 0 0
/ C* R! ]/ J$ p+ x% c9 O% \  ]1 1 1 1 1 0 0 0
; a- B8 r# _# f2 ?+ U1 1 1 1 1 0 1 0
1 1 1 1 1 1 1 0
1 1 1 1 0 1 1 1
7 d: P+ ~- }  R1 0 0 1 1 0 1 0
, A3 v- [& ~/ J9 A1 0 0 0 1 0 1 0
- ]' R  u7 g! }1 0 0 0 1 1 1 0
5 i% F& B( U3 _* l/ d% A+ sI = imread('blood1.tif');
BW3 = ~im2bw(I);
BW4 = bwfill(BW3,'holes');
' m9 r% _/ D  F, \3 bimshow(BW3)
figure, imshow(BW4)
: I2 z! ?" i* y! T相关命令:
bwselect, roifill
1 N' {! ]% ?# k3 {$ N
( R. Z% P. {; E/ S
8.bwlabel
- l; @  I1 u6 |) Q功能:
标注二进制图像中已连接的部分.
( k- _$ T# q* _语法:
附录 MATLAB图像处理命令 323
! F# @* n8 v3 f9 b' n* U' rL = bwlabel(BW,n)
" C$ a6 i- v7 |2 @[L,num] = bwlabel(BW,n)
: p  Q" R! c( ?! |举例
5 Q$ r! U' A. q- J- SBW = [1 1 1 0 0 0 0 0
4 f( ]$ Z8 F' l$ G) f' H4 S; g1 1 1 0 1 1 0 0
" ]# H  X0 R7 m: @) N1 1 1 0 1 1 0 0
: n2 ~4 Q7 h4 p( H: _9 V1 1 1 0 0 0 1 0
1 1 1 0 0 0 1 0
2 ]2 b& H0 Y8 o; @+ V& f+ \+ J1 f1 1 1 0 0 0 1 0
4 D; M& x- Q1 c8 ?1 1 1 0 0 1 1 0
; {( u, @& ?$ h/ @
L = bwlabel(BW,4)
* F+ T5 v% L1 E- U3 tL =
1 1 1 0 0 0 0 0
1 1 1 0 2 2 0 0
: k7 v$ {* L! Q8 G2 z1 1 1 0 2 2 0 0
+ i9 x- f- h, B$ ?, B1 \1 1 1 0 0 0 3 0
1 1 1 0 0 0 3 0
# h( Y6 d3 ^; o1 d+ p5 U1 1 1 0 0 0 3 0
+ M4 Y7 r* n# |, W# P1 1 1 0 0 3 3 0
) Z  ^: m7 v$ `. x* _* B1 1 1 0 0 0 0 0
. J* g8 k" X$ K% t[r,c] = find(L==2);
. ^2 S7 o* ?. C4 ~rc = [r c]
& ^7 [5 U. w# ]5 q1 M* \rc =
2 5
8 J/ p/ E/ P' }/ w0 }: ^3 5
' s, r- `2 {7 O! k2 6
: c6 e; F. P6 r- B! q% C/ ]3 6
! w) J5 M! g" o) T5 {0 p) ~相关命令:
6 f5 u. u* [4 \' J% Q! l) @bweuler, bwselect

! U+ R5 A; Q( X& t4 l
5 u! L- Q6 ?: x! A+ v: a9.bwmorph
功能:
提取二进制图像的轮廓.
9 G4 z% G1 ~* s8 e5 b  g+ `/ m语法:
BW2 = bwmorph(BW1,operation)
BW2 = bwmorph(BW1,operation,n)
. b5 t( T- [# C8 U8 q1 }举例
4 S( F# ]$ R) `8 [% YBW1 = imread('circles.tif');
MATLAB高级应用——图形及影像处理 324
6 u+ W8 B+ e+ Q- L$ c3 |6 vimshow(BW1);
BW2 = bwmorph(BW1,'remove');
* A1 y" F( p. K+ ~% ?# ?- uBW3 = bwmorph(BW1,'skel',Inf);
, n6 p  o& D  kimshow(BW2)
figure, imshow(BW3)
9 O# ]. P; r" }0 d5 ]% y; r相关命令:
bweuler, bwperim, dilate, erode
8 G1 r- g* y7 w! \' M# h

10.bwperim
功能:
2 Q7 ~8 h; a' @6 a计算二进制图像中对象的周长.
语法:
BW2 = bwperim(BW1,n)
举例
: c0 z% D! B1 g; qBW1 = imread('circbw.tif');
) o8 k1 o% i$ O- R6 r" }+ RBW2 = bwperim(BW1,8);
imshow(BW1)
! k5 R* u& g% N6 T4 O1 [% e! I; {: Wfigure, imshow(BW2)
" a; f3 e4 s9 S9 C+ }附录 MATLAB图像处理命令 325
/ h4 X" u& e' r8 n% |4 q2 _相关命令:
bwarea, bweuler, bwfill


$ A) k: ]  P' P2 ?" Q' k' v11.bwselect
功能:
在二进制图像中选择对象.
语法:
BW2 = bwselect(BW1,c,r,n)
+ d! u" ^3 Z0 N$ I+ \3 U3 ?$ xBW2 = bwselect(BW1,n)
4 I: {3 |: f- Y' n$ E[BW2,idx] = bwselect(...)
举例
BW1 = imread('text.tif');
. s1 x! w' E. q9 j6 Z( V/ [1 |* Oc = [16 90 144];
, U7 W# _* H" X* g( @( ir = [85 197 247];
# W4 p" h& j' H) R) xBW2 = bwselect(BW1,c,r,4);
. v: H" G  c" Z% e& u% T  ~; O% H# E! ?imshow(BW1)
figure, imshow(BW2)
" l. |5 F% d/ |8 {* m9 Y相关命令:
8 ?' E6 n0 W- u9 s9 \3 M2 Mbwfill, bwlabel, impixel, roipoly, roifill


9 ?- q7 x+ {2 @12.cmpermute
MATLAB高级应用——图形及影像处理 326
+ `$ }; l( y( Y6 z功能:
调整颜色映像表中的颜色.
: v7 v1 E; ~7 V1 I语法:
[Y,newmap] = cmpermute(X,map)
4 |) ?# H8 P& J/ }[Y,newmap] = cmpermute(X,map,index)
举例
To order a colormap by luminance, use:
; ?& E5 W/ p7 ?3 vntsc = rgb2ntsc(map);
[dum,index] = sort(ntsc(:,1));
[Y,newmap] = cmpermute(X,map,index);
; r8 z- G( L5 h# p! i+ ~相关命令:
8 ~4 w; @! z0 M/ Urandperm
7 |9 j3 l1 ^; z% {
, |) C9 W; l4 u8 Q1 R
13.cmunique
功能:
7 f: ]3 ^( G2 q查找颜色映像表中特定的颜色及相应的图像.
9 F- D2 F+ s+ i3 |" D$ m( ~9 N语法:
- t8 u3 k9 u: V% B[Y,newmap] = cmunique(X,map)
[Y,newmap] = cmunique(RGB)
[Y,newmap] = cmunique(I)
( `6 _  c, k! Q! U相关命令:
9 ?7 P7 Z& i" e4 ngray2ind, rgb2ind
( ~) ?) o6 t  n/ ]: r" G

14.col2im
/ O! P2 F* ^; T5 H2 a! ?5 [6 M3 w功能:
将矩阵的列重新组织到块中.
- \& i! J8 A; d; p语法:
A = col2im(B,[m n],[mm nn],block_type)
$ _0 _, q, T: Q3 `A = col2im(B,[m n],[mm nn])
相关命令:
blkproc, colfilt, im2col, nlfilter


5 C7 {" V! I. A; W- e' F- s15.colfilt
功能:
利用列相关函数进行边沿操作.
$ [+ a, q0 V3 s6 L语法:
5 G( m- k& P1 Y0 G. H6 O9 k% ?B = colfilt(A,[m n],block_type,fun)
B = colfilt(A,[m n],block_type,fun,P1,P2,...)
/ s( X' v8 J$ I; a& FB = colfilt(A,[m n],[mblock nblock],block_type,fun,...)
B = colfilt(A,'indexed',...)
% }7 k9 ~8 a- D( q$ v& w. a+ t- {附录 MATLAB图像处理命令 327
相关命令:
blkproc, col2im, im2col, nlfilter
0 c  C! o* @3 s( A0 t
2 c8 F$ s, t$ V; F( V
16.colorbar
+ P1 u! [; s" ?! Y+ x& ~功能:
显示颜色条.
# Y4 b4 W7 y# V语法:
: U1 x, X9 d1 m5 F6 J& lcolorbar('vert')
: Y0 G; y4 I9 f; \3 d% C8 ~colorbar('horiz')
& R7 H; U9 ?3 T# Ccolorbar(h)
colorbar
h = colorbar(...)
0 Z8 w; K" O$ o$ w' @举例
# _2 z* E) E4 }* \" |1 cI = imread('blood1.tif');
h = fspecial('log');
) c  k/ S7 B: e* s0 B, XI2 = filter2(h,I);
imshow(I2,[]), colormap(jet(64)), colorbar


17.conv2
功能:
; W& |0 N2 c$ a# ~; T9 x' {进行二维卷积操作.
- C1 c7 b! l6 a' t0 Q1 p语法:
C = conv2(A,B)
# @4 \5 ]  w* PC = conv2(hcol,hrow,A)
) o* x. Q4 U# DC = conv2(...,shape)
举例
A = magic(5)
A =
17 24 1 8 15
23 5 7 14 16
4 6 13 20 22
6 E3 g! [% c& a. C, O( C/ O1 pMATLAB高级应用——图形及影像处理 328
3 d# K( T9 N5 G# O- Z( _' B10 12 19 21 3
11 18 25 2 9
* F+ Z8 }% ]1 o3 H7 XB = [1 2 1;0 2 0;3 1 3]
B =
1 2 1
0 2 0
3 1 3
C = conv2(A,B)
C =
17 58 66 34 32 38 15
$ ~, G0 k, Q: h( i1 c9 E7 @23 85 88 35 67 76 16
55 149 117 163 159 135 67
1 V5 P; l! I- J1 R9 k+ T79 78 160 161 187 129 51
23 82 153 199 205 108 75
30 68 135 168 91 84 9
2 h+ p; `$ F0 j" C, a; v1 j0 u! M33 65 126 85 104 15 27
/ M$ |  ]+ ]* b. w! Y6 |3 S' o相关命令:
filter2


* o; Z) u7 d9 D: Z9 \8 p  f8 a18.convmtx2
功能:
计算二维卷积矩阵.
语法:
9 x# y4 q' T! _2 y* }$ uT = convmtx2(H,m,n)
, ^+ N' u+ d, F! ?3 NT = convmtx2(H,[m n])
相关命令:
conv2

9 n- z0 Z+ u( P/ o! L' T) b4 @
# b9 {! v- t3 W' y6 n: c  N19.convn
, t9 h, i# y; r6 G6 R- Q5 T功能: 计算n维卷积.
语法:
/ [7 k! |; u3 T4 ?: sC = convn(A,B)
C = convn(A,B,shape)
相关命令:
conv2

* ~  y$ X: {. g. w: b! E
4 H7 T% n: y) ?3 g20.corr2
: b4 ]% a& _8 k# n; h4 Z功能:
计算两个矩阵的二维相关系数.
5 e' Q# F# o- O8 z附录 MATLAB图像处理命令 329
语法:
! ?$ ~: M6 v3 h) _: o7 w9 y5 y  ar = corr2(A,B)
8 W$ q! L  c% }相关命令:
std2
1 E) i0 _0 W1 A; P4 T
% j% k* j1 ~5 m' y
21.dct2
* ^! \' S7 A& |功能:
进行二维离散余弦变换.
语法:
B = dct2(A)
B = dct2(A,m,n)
5 L7 n5 o7 d( S" nB = dct2(A,[m n])
举例
9 Z% @; r& Q, ~' O) y+ o( IRGB = imread('autumn.tif');
I = rgb2gray(RGB);
J = dct2(I);
imshow(log(abs(J)),[]), colormap(jet(64)), colorbar
' h" _7 q9 z# s8 \J(abs(J) < 10) = 0;
7 B" M# f+ j: W: x( hK = idct2(J)/255;
. f/ e5 ~' n* l5 aimshow(K)
相关命令:
& |% F( k3 B+ t$ i4 Tfft2, idct2, ifft2

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