MATLAB图像处理命令集汇

geronimo123

1.applylut
4 \  q- b! l/ y" Q功能:
, g3 u) ?9 {8 }" e在二进制图像中利用lookup表进行边沿操作.
语法:
5 l4 I- x( A: aA = applylut(BW,lut)
举例
lut = makelut('sum(x( : )) == 4 ',2);
BW1 = imread('text.tif');
8 D7 Y$ X* C8 I% D% q2 X; iBW2 = applylut(BW1,lut);
imshow(BW1)
figure, imshow(BW2)
相关命令:
makelut
8 n! l( s! C8 f
& ]0 G; f3 v# N' r: g0 J3 F
2.bestblk
# H- `- j. i3 R2 q功能:
确定进行块操作的块大小.
& V4 d! i& o8 x, _; G! U" W+ G" ~语法:
siz = bestblk([m n],k)
/ r+ p2 @) ?5 p4 ~, u7 E[mb,nb] = bestblk([m n],k)
举例
siz = bestblk([640 800],72)
siz =
64 50
' t; T6 Z$ C+ z& ]3 s& Q5 o相关命令:
: F% g2 V8 R: R1 [6 _7 T0 R5 Rblkproc
& Z9 T1 g& i/ Z2 I
9 H! w( t9 b5 D
3.blkproc
, O. [) y, Y( B2 y, k- k/ C1 a功能:
MATLAB高级应用——图形及影像处理 320
实现图像的显式块操作.
0 j' E" f; R$ x3 l语法:
* \% c$ o9 X0 Z! fB = blkproc(A,[m n],fun)
# d% d( V- ~9 E9 p6 IB = blkproc(A,[m n],fun,P1,P2,...)
B = blkproc(A,[m n],[mborder nborder],fun,...)
: }, U! n- f( n1 cB = blkproc(A,'indexed',...)
; G+ K9 Z! S1 f9 Q/ j8 O举例
I = imread('alumgrns.tif');
I2 = blkproc(I,[8 8],'std2(x)*ones(size(x))');
1 W" n3 ?. {7 timshow(I)
9 G2 B0 t& S' nfigure, imshow(I2,[]);
相关命令:
colfilt, nlfilter,inline


4.brighten
2 u  V* A6 O* `7 c功能:
7 x. P9 A. u$ S4 T9 z& d. r, L增加或降低颜色映像表的亮度.
) T$ j$ J0 `' t% a+ q, r2 P语法:
brighten(beta)
newmap = brighten(beta)
newmap = brighten(map,beta)
brighten(fig,beta)
相关命令:
. H) ^, \0 g( a5 P3 Oimadjust, rgbplot

5 N' |8 u% d1 V& V% }: z# T
2 Q5 n. U- f1 g: b! I& m6 O; A: R5.bwarea
功能:
( u& i/ Y+ }% @3 a7 p7 m6 p) ?计算二进制图像对象的面积.
/ T8 r; I1 {; v% e) N) R* B语法:
total = bwarea(BW)
举例
BW = imread('circles.tif');
imshow(BW);
) t+ E- E! x2 ~+ h附录 MATLAB图像处理命令 321
bwarea(BW)
( b( [) W) L2 O: F; f) O% p8 s; yans =
15799
9 @( r2 L$ R2 B/ |4 D& v相关命令:
bweuler, bwperim
3 e! y& L6 E* C+ p( M' R& K

6.bweuler.
功能:
计算二进制图像的欧拉数.
  n4 a+ P/ j: N0 w" P语法:
eul = bweuler(BW,n)
举例
. t3 D2 {: n% o/ r0 Q* nBW = imread('circles.tif');
imshow(BW);
bweuler(BW)
- p- t# z' W" w3 T5 n% y! K. f( fans =
-2
$ u9 G7 ?8 J1 a) p: `3 |1 n相关命令:
( W! G$ x+ T6 I0 f" s$ k( ^bwmorph, bwperim


7.bwfill
' e& n2 K  h& r" j# H3 P$ G+ K$ c功能:
填充二进制图像的背景色.
) y+ w7 c7 d# _& `5 }语法:
8 \( p8 w0 R( ^BW2 = bwfill(BW1,c,r,n)
9 R. R: X0 y* {( }( DBW2 = bwfill(BW1,n)
[BW2,idx] = bwfill(...)
# F; G2 q$ w) A) p. m& ~5 T% Z/ GBW2 = bwfill(x,y,BW1,xi,yi,n)
[x,y,BW2,idx,xi,yi] = bwfill(...)
BW2 = bwfill(BW1,'holes',n)
7 e$ n- l9 R3 d  \[BW2,idx] = bwfill(BW1,'holes',n)
. W3 A( ?0 Y0 X0 V: _" q1 n0 _举例
+ C: x% q9 K' U$ iMATLAB高级应用——图形及影像处理 322
BW1 =[1 0 0 0 0 0 0 0
' G7 j! g  L: T1 1 1 1 1 0 0 0
! O) Z3 M& Z7 y: c4 J4 j1 0 0 0 1 0 1 0
9 I0 x; E4 P0 K( h1 0 0 0 1 1 1 0
1 1 1 1 0 1 1 1
1 0 0 1 1 0 1 0
1 0 0 0 1 0 1 0

9 q  m& k  }; {8 rBW2 = bwfill(BW1,3,3,8)
3 C0 _. Z/ K; B% a5 @5 o3 TBW2 =
1 0 0 0 0 0 0 0
1 1 1 1 1 0 0 0
' D1 t3 S6 P( B) C, A6 R1 1 1 1 1 0 1 0
0 @: R, D- k& d$ v) B1 1 1 1 1 1 1 0
) X& {* E) U0 X* Q1 1 1 1 0 1 1 1
1 0 0 1 1 0 1 0
) t3 i8 E- f: W+ y0 G6 L1 0 0 0 1 0 1 0
1 0 0 0 1 1 1 0
; _" g- c6 ^" w' {, Y+ bI = imread('blood1.tif');
. Z$ G* z! W/ e' M' `BW3 = ~im2bw(I);
BW4 = bwfill(BW3,'holes');
imshow(BW3)
2 x7 X, G% x) `: [figure, imshow(BW4)
相关命令:
0 M8 R6 ^4 g; ]bwselect, roifill
1 D3 |2 W! ^2 _

8.bwlabel
功能:
标注二进制图像中已连接的部分.
语法:
附录 MATLAB图像处理命令 323
L = bwlabel(BW,n)
2 J: J4 d2 t, w& {: ?8 V[L,num] = bwlabel(BW,n)
; [. g( \' q" c' I+ E举例
9 x. P% l" {: k4 V3 XBW = [1 1 1 0 0 0 0 0
6 E6 l) B3 F; d# U: ^, Q; w. S- A1 1 1 0 1 1 0 0
' `& t: J6 G6 W/ ]* S( P$ G1 1 1 0 1 1 0 0
+ V- u* g' c8 l" W/ ?1 1 1 0 0 0 1 0
$ m! o' U5 c! w/ M2 Z( X1 1 1 0 0 0 1 0
1 1 1 0 0 0 1 0
, Y+ Y1 d" r% _8 E1 1 1 0 0 1 1 0

L = bwlabel(BW,4)
L =
1 1 1 0 0 0 0 0
1 1 1 0 2 2 0 0
3 m. A3 y* E2 L+ R3 K3 E# f1 1 1 0 2 2 0 0
1 1 1 0 0 0 3 0
8 u7 t* E( j% p* W' c! W! @4 D1 1 1 0 0 0 3 0
- v1 l) c3 j! B. ], {# h, k1 1 1 0 0 0 3 0
9 R5 l, ]0 z% D" r& R1 1 1 0 0 3 3 0
1 1 1 0 0 0 0 0
[r,c] = find(L==2);
$ |4 [5 p7 U7 l! Y8 S9 b) Grc = [r c]
# p3 l7 s3 Y" D# M) B* `  Z6 }  src =
) q4 g' t. [2 o) `1 V2 5
3 5
, e& b1 @9 F9 Y( j6 b2 6
3 6
6 Z- `1 D" Q/ e1 r6 U9 d相关命令:
- s* J9 I/ O' V% |; Ibweuler, bwselect
/ f# R3 \" g; k

9.bwmorph
功能:
提取二进制图像的轮廓.
语法:
BW2 = bwmorph(BW1,operation)
" j2 _. g- t7 M" eBW2 = bwmorph(BW1,operation,n)
3 X( T" }+ L9 R& {举例
BW1 = imread('circles.tif');
" ^# `) v* C' u: P: w, S4 h* ?MATLAB高级应用——图形及影像处理 324
imshow(BW1);
0 U" o+ |& Q, T# x. L2 T0 tBW2 = bwmorph(BW1,'remove');
BW3 = bwmorph(BW1,'skel',Inf);
imshow(BW2)
% L, X/ v! Z- b+ B' tfigure, imshow(BW3)
相关命令:
4 v5 R. ~7 A" r3 J) ?5 U, Ebweuler, bwperim, dilate, erode
( [5 D3 _( F. Q+ b/ g9 T

10.bwperim
功能:
5 y0 S9 v6 p( @! j) l0 v+ @计算二进制图像中对象的周长.
语法:
BW2 = bwperim(BW1,n)
: Q1 i6 v  I9 Z: P' j$ Y0 t- G举例
, p# C' f8 D  N; `1 xBW1 = imread('circbw.tif');
BW2 = bwperim(BW1,8);
$ ~: G; }" ]  F  f. t- b* ^imshow(BW1)
0 v  n6 v, I  ~  {' {+ Pfigure, imshow(BW2)
4 F0 Z/ ?# }9 k4 \# S附录 MATLAB图像处理命令 325
. C% P  ~) I4 V7 S- C% m相关命令:
; y* f1 _6 Z' I" ?6 p4 j& qbwarea, bweuler, bwfill
! ?9 K3 L! d# y/ q8 j8 M0 j7 ?

11.bwselect
功能:
在二进制图像中选择对象.
  u$ K5 H1 q. N! c7 i! K( G语法:
BW2 = bwselect(BW1,c,r,n)
BW2 = bwselect(BW1,n)
[BW2,idx] = bwselect(...)
3 U0 \+ q# m% Z% V, U举例
BW1 = imread('text.tif');
, H( Q9 u. p5 P2 Kc = [16 90 144];
r = [85 197 247];
BW2 = bwselect(BW1,c,r,4);
imshow(BW1)
$ Y* h3 }$ F* `figure, imshow(BW2)
相关命令:
bwfill, bwlabel, impixel, roipoly, roifill

6 O2 C' _6 G+ S( X, z1 i
12.cmpermute
' c+ r2 x/ ]/ ^1 |MATLAB高级应用——图形及影像处理 326
. l4 n; _) _. }9 a5 \# i* R4 y8 j功能:
4 A5 `5 Y4 l. G, F  {: e0 d1 _调整颜色映像表中的颜色.
, ^1 g' V& U- J! n! C语法:
[Y,newmap] = cmpermute(X,map)
( y) x: P, q/ q" W* z[Y,newmap] = cmpermute(X,map,index)
" G8 Y; l9 l# A( A- y举例
% E; a) Z& U/ G; Y$ b' }& r4 vTo order a colormap by luminance, use:
) Z8 b* Q% q/ `5 Y" v+ G2 sntsc = rgb2ntsc(map);
[dum,index] = sort(ntsc(:,1));
[Y,newmap] = cmpermute(X,map,index);
( k# J4 f: Z/ V0 o  N相关命令:
randperm


13.cmunique
功能:
1 i6 v; Y% k; z- i查找颜色映像表中特定的颜色及相应的图像.
. x" n! ^+ P2 B+ K' B! a6 e$ C6 T2 m语法:
9 P. {0 K3 q7 `9 N[Y,newmap] = cmunique(X,map)
[Y,newmap] = cmunique(RGB)
( W$ u; K4 O$ \$ t3 D& k! W[Y,newmap] = cmunique(I)
) T$ D/ R" t" f# B相关命令:
gray2ind, rgb2ind


14.col2im
功能:
将矩阵的列重新组织到块中.
3 G" P! N, x: V5 N9 b语法:
A = col2im(B,[m n],[mm nn],block_type)
+ \! m1 Y, j6 K8 ?* }A = col2im(B,[m n],[mm nn])
相关命令:
8 {- Q9 Q6 _( O5 B; z2 Nblkproc, colfilt, im2col, nlfilter
$ ]$ t4 E& y0 _% `1 |
4 r; q! ^. z$ i$ N; o! z
15.colfilt
7 u7 R+ Z6 m! O& I3 v9 ^功能:
7 c4 q- o4 ~6 }$ Z& [利用列相关函数进行边沿操作.
# S' H* P# h3 e1 f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,...)
B = colfilt(A,'indexed',...)
附录 MATLAB图像处理命令 327
) g8 c% ~3 o" _相关命令:
  K6 {) r/ Z+ J) ]blkproc, col2im, im2col, nlfilter


16.colorbar
4 H5 m/ a1 `* `+ N: h0 U  p4 ~功能:
显示颜色条.
语法:
colorbar('vert')
/ X3 X, n3 D6 `* p, d7 i  P9 {colorbar('horiz')
colorbar(h)
! I& M' \0 D" V* f! o( Y$ Bcolorbar
; @7 i# P& f; ~8 c5 Q; N, mh = colorbar(...)
9 X# U* }* l; I1 J. \/ o3 {举例
/ W% G' R& G0 u( P; CI = imread('blood1.tif');
0 C1 R: l8 E7 w4 e5 Rh = fspecial('log');
I2 = filter2(h,I);
3 M2 g+ A% x. `7 E0 gimshow(I2,[]), colormap(jet(64)), colorbar
* u& ]  C7 r$ s% f# P
8 s8 g9 _' f! j6 J6 I" r
; I2 H* [4 b5 |) b( l, C( J17.conv2
功能:
5 T2 b% a1 W3 @进行二维卷积操作.
4 t# c* V' b9 f语法:
; }3 H- r* w( Q4 i* c* {. e( @C = conv2(A,B)
! H4 _! i3 ?* W; o- ^$ bC = conv2(hcol,hrow,A)
C = conv2(...,shape)
6 F9 {7 W+ D' t6 ?+ t! R举例
A = magic(5)
$ M- Z6 [& ?' K+ y6 f: EA =
7 t7 n" w/ f# l4 V! |17 24 1 8 15
: r* B0 T3 b4 L- Q, e' b- [23 5 7 14 16
6 B; _7 t& C; p' P! d) \$ D4 6 13 20 22
1 B1 f( e- `# O8 }MATLAB高级应用——图形及影像处理 328
  z2 s) z' |6 S2 G* r! U10 12 19 21 3
11 18 25 2 9
9 v* f4 v( C( c& C) k0 W7 E- s& |B = [1 2 1;0 2 0;3 1 3]
% b7 ^; |* P8 ~1 `0 Y1 x& h3 tB =
5 `; x; s8 ~; @$ z* P/ z. F: F! v4 Q1 2 1
( c0 y, p5 D3 |. u0 2 0
* a( u" v/ R0 {, N+ b) C3 1 3
& q/ K& m0 u" L$ j5 KC = conv2(A,B)
C =
6 G' m( o3 |2 ]' c+ ^& D  L- {17 58 66 34 32 38 15
$ _+ `  N. n" a" n, ^. i23 85 88 35 67 76 16
55 149 117 163 159 135 67
& P6 t; x: a- Z# r" U7 R/ l0 n79 78 160 161 187 129 51
23 82 153 199 205 108 75
: A2 N0 @3 J3 k3 S" n3 u30 68 135 168 91 84 9
9 L! R! f1 S$ B! ~33 65 126 85 104 15 27
相关命令:
filter2


18.convmtx2
7 C( b! x" r- U4 T3 A功能:
计算二维卷积矩阵.
语法:
) j9 M" ?, S, F4 C2 fT = convmtx2(H,m,n)
T = convmtx2(H,[m n])
( j" {8 D, A# y2 Q8 Y相关命令:
8 W6 E2 G. P- U3 {. x) `" g5 }conv2
9 V2 }* b* T/ G- {
3 ]7 ?- s5 {7 [: [9 U5 j
19.convn
7 B4 |/ i; `# C9 n, J' J( q功能: 计算n维卷积.
: W( W: L' \5 X5 w- y语法:
C = convn(A,B)
C = convn(A,B,shape)
3 X! l7 I' g1 C! N' P: Z相关命令:
! x$ A2 H% Y8 \/ b$ w7 Lconv2

& D/ u9 p4 J3 M3 z4 s* Y
( f4 S) l9 n9 q' o( B" D# c20.corr2
: V% g0 \: e/ m7 Z6 E功能:
9 c& q4 z2 T8 t+ G6 @. @计算两个矩阵的二维相关系数.
附录 MATLAB图像处理命令 329
语法:
r = corr2(A,B)
相关命令:
( s6 M9 v' V+ t6 |$ jstd2
, P' F+ \; a/ M# i" l. C

4 b7 o7 K& i) R. |21.dct2
2 t: r/ L2 Y5 q4 R2 ^. a  a9 ?( q功能:
! T4 J/ y. K4 s' W进行二维离散余弦变换.
* Y$ F5 q+ l, M; x3 O4 n语法:
9 F) N% [9 j" \' E( pB = dct2(A)
B = dct2(A,m,n)
B = dct2(A,[m n])
举例
RGB = imread('autumn.tif');
I = rgb2gray(RGB);
( Y8 s) I& G! ?, ]2 `% m; HJ = dct2(I);
imshow(log(abs(J)),[]), colormap(jet(64)), colorbar
2 e4 a( z8 x/ _J(abs(J) < 10) = 0;
- q, c: U# a9 k' n& RK = idct2(J)/255;
  ~2 o# B8 T0 e3 Q- N: f6 O- aimshow(K)
相关命令:
. O: ?- j/ r" G1 bfft2, 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