matlab image processing

[FarCry]

Thelo na metatrepso mia eikona aspromauri se ena pinaka timon. 1 mauro 0 aspro. i eikona einai 800 * 600 jpg. Epeita thelo na ipologiso posa 0 kai ta 1 exei mia tixaia stili gia na bgalo kati statistika dedomena.

 

pos tha to kano se matlab? euxaristo

[RestlessNick]

me imread diavazeis tin eikona,

des to help tou matlab,

den exo sunantisei kalutero help pote,

k 8a sou lusei oles sou tis apories

 

tora me tin sunartisi randn epilegeis "tuxaia"

 

i eikona einai egxromi k 8eleis na tin kaneis aspromauri ?

an nai tote kaneis thresholding me 0.5 ( normalized )

 

alla epeidi i DIP den einai i eidikotita mou ri3e k mia matia

filexchange tou matlab central sigoura 8a vreis kati

[FarCry]

Thanks gia to reply. me imread diabazo tin eikona kai mou tin kanei se uint8. emfanizei to aspro kai to mauro se 0 kai 255. meta tin pernao apo to im2bw gia na tin metatrepso se binary 0 kai 1 diladi.

 

gia to manipulation tou pinaka de ksero. thelo na paro 2 tixaies stiles apo tis 600 giati i eikona einai 800 * 600 to idio kai o pinakas. kai na metriso ta miden i ta 1 auton ton 2 stilon. kai meta thelo na bgalo to athroisma ton 4 zeugarion metaksi tous diladi (0,0) (0,1) (1,0) (1,1)

 

thelo na eksago statistika gia pithanotites.

[leequid]

ean einai a o pinakas 800x600 tote dinontas

 

r = randperm(600);

 

tha pareis ena anysma me tyxaies (shuffled) times apo 1 ews 600.

 

Meta dinontas

 

a = p(:,r(1:2));

 

tha sou dwsei tis dyo tyxaies stiles pou thes se pinaka.

 

Gia na metriseis tous asous grafeis

 

n1 = max(size(find(p(:,1)==1)));

n2= max(size(find(p(:,2)==1)));

(Mporei na exei kai aplousteri methodo psaxto)

 

To last den to piasa

[FarCry]

Thanks gia tin apantisi. Thelo kai ta 4 zeugaria. Oi 2 stiles exoun 800 stoixeia i kathemia apo 0 kai 1. thelo na metriso posa zeugaria (0,0), (0,1), (1,0), (1,1) iparxoun metaksi ton 2 stilon pou exoun epilexthei.

[FarCry]

Thanks gia tin apantisi. Thelo kai ta 4 zeugaria. Oi 2 stiles exoun 800 stoixeia i kathemia apo 0 kai 1. thelo na metriso posa zeugaria (0,0), (0,1), (1,0), (1,1) iparxoun metaksi ton 2 stilon pou exoun epilexthei.

 

paradeigma

 

if coloumn 1==0 && column 2 == 0 then x=x+1;

if coloumn 1==0 && column 2 == 1 then y=y+1;

if coloumn 1==1 && column 2 == 0 then z=z+1;

if coloumn 1==1 && column 2 == 1 then k=k+1;

[leequid]

Xwris na einai o apolytos tropos,apla enas apo tous pollous:

 

_____________________________________________________________

 

k = imread('1.bmp');

i = im2bw(k);

r = randperm(600);

a = i(:,r(1:2));

 

n01 = size(find(a(:,1)==0));

n02= size(find(a(:,2)==0));

n11 = size(find(a(:,1)==1));

n12= size(find(a(:,2)==1));

 

max0_col1=n01(1);

max0_col2=n02(1);

max1_col1=n11(1);

max1_col2=n12(1);

 

x1=0;

x2=0;

y1=0;

y2=0;

 

for i=1:225

if a(i,1)==0 && a(i,2)==0

x1=x1+1;

end

if a(i,1)==0 && a(i,2)==1

y1=y1+1;

end

if a(i,1)==1 && a(i,2)==0

y2=y2+1;

end

if a(i,1)==1 && a(i,2)==1

x2=x2+1;

end

end

 

_____________________________________________________________

[FarCry]

Thanks gia tin apantisi

 

epeidi to im2bw de pianei giati den exo egkatestimeno to image toolbox to ekana os eksis

 

i=(i>200);

 

kai mou to kanei to 0,255 se 0,1 boolean. an i timi einai megaliteri tou 200 to kanei 1 allios bazei miden.

[leequid]

Den kserw akrivws pws leitourgei i synartisi im2bw,kalo tha itan na psaxteis ligo sto google kai sto wikipedia gia to filtro metatropis se aspromauro.

[FarCry]

Den kserw akrivws pws leitourgei i synartisi im2bw,kalo tha itan na psaxteis ligo sto google kai sto wikipedia gia to filtro metatropis se aspromauro.

 

den xrisimopoio tin im2bw opos anefera proigoumenos giati den exo egkatestimeno to image toolbox. den einai default sto matlab

 

epeidi to im2bw de pianei giati den exo egkatestimeno to image toolbox to ekana os eksis

.

 

epeidi i eikona einai idi aspromauri emfanizei 0 kai 255 anti gia 0 kai 1 giati to imread to petaei se uint8 kai oxi se binary. alla trexontas

 

i=(i>200);

 

metatrepo se 0 kai 1 ton pinaka

[leequid]

Nai kai egw sou eksigw oti epeidi DEN kserw pws leitourgei i im2bw, DEN gnwrizw an ayto pou kaneis einai swsto.

[FarCry]

ma den exei simasia. eite einai 0 kai 255, eite einai 0 kai 1, 2 xromata antiprosopeuei aspro kai mauro. i eikona pou diabazo me to imread einai aspromauri eksarxis den einai egxromi. mipos ekei egine i pareksigisi

[leequid]

H alitheia einai oti einai swsto auto pou les,apla prepei na prosekseis to threshold (200) pou tha valeis gia na exeis akriveia.Genika oi eikones pou fainontai aspromayres einai greyscale giayto kai sou vgazei times 0-255.