How can I save data from features files into matrix?
6 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
i want to save data from 500 images features files every file contain 6 types of features types such as jcd,tamura,..... .,
the problem is that the data for these 6 features are seperated by comma,i want to make six matrices for these 500 image for type of features ,i atteched this file to help
can any one help
2 commentaires
per isakson
le 14 Oct 2019
"the problem is that the data for these 6 features are seperated by comma" Why is that a problem?
Réponse acceptée
per isakson
le 15 Oct 2019
Modifié(e) : per isakson
le 15 Oct 2019
I understand that "data for each feature for 500 images" is in ONE text file with 500 blocks of six rows. The format is illustrated by im1.txt which contains two blocks.
Try this
>> S = cssm('im1.txt')
S =
1×2 struct array with fields:
JCD
Tamura
ColorLayout
EdgeHistogram
AutoColorCorrelogram
PHOG
>> JCD_matrix = cat( 1, S(:).JCD );
>> whos JCD_matrix
Name Size Bytes Class Attributes
JCD_matrix 2x168 2688 double
where (in one m-file)
function im = cssm( ffs )
%%
fid = fopen( ffs, 'rt' );
buf = textscan( fid, '%s', 'Delimiter', '\n' );
fclose( fid );
buf = buf{1};
%%
len = floor( size(buf,1)/6 ); % number of blocks
im(1,len) = struct( 'JCD',[], 'Tamura',[], 'ColorLayout',[] ...
, 'EdgeHistogram',[], 'AutoColorCorrelogram',[], 'PHOG',[] );
%%
for jj = 1 : len
im(jj).JCD = read( buf{(jj-1)*6 + 1 }, 'JCD' , (jj-1)*6+1 );
im(jj).Tamura = read( buf{(jj-1)*6 + 2 }, 'Tamura' , (jj-1)*6+2 );
im(jj).ColorLayout = read( buf{(jj-1)*6 + 3 }, 'ColorLayout' , (jj-1)*6+3 );
im(jj).EdgeHistogram = read( buf{(jj-1)*6 + 4 }, 'EdgeHistogram' , (jj-1)*6+4 );
im(jj).AutoColorCorrelogram = read( buf{(jj-1)*6 + 5 }, 'AutoColorCorrelogram', (jj-1)*6+5 );
im(jj).PHOG = read( buf{(jj-1)*6 + 6 }, 'PHOG' , (jj-1)*6+6 );
end
end
function row = read( chr, name, n )
cac = strsplit( chr, ':' );
assert( strcmp(cac{1},name),'Row, %d, is "%s". Expected is "%s"', n, cac{1}, name )
num = textscan( cac{2}, '%f', 'Delimiter',',' );
row = reshape( num{1}, 1,[] );
end
If execution time is a problem replace
cac = strsplit( chr, ':' );
by
cac = regexp( chr, ':', 'split' );
5 commentaires
per isakson
le 16 Oct 2019
I wrote: "I understand that "data for each feature for 500 images" is in ONE text file with 500 blocks of six rows. The format is illustrated by im1.txt which contains two blocks."
Why don't you say that I missinterpreted the question?
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Language Support dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!