Similar to imwrite, except follows a strict naming convention.
Wrapper for imwrite that writes file to the filename:
fName = [path name int2str2(i,nDigits) '.' ext];
Using imwrite:
imwrite( I, fName, writePrms )
If I represents a stack of images, the ith image is written to:
fNamei = [path name int2str2(i+imagei-1,nDigits) '.' ext];
If I=[], then imwrite2 will attempt to read images from disk instead.
If dir spec. by 'path' does not exist, imwrite2 attempts to create it.
mulFlag controls how I is interpreted. If mulFlag==0, then I is
intrepreted as a single image, otherwise I is interpreted as a stack of
images, where I(:,:,...,j) represents the jth image (see fevalArrays for
more info).
If nSplits>1, writes/reads images into/from multiple directories. This is
useful since certain OS handle very large directories (of say >20K
images) rather poorly (I'm talking to you Bill). Thus, can take 100K
images, and write into 5 separate dirs, then read them back in.
USAGE
I = imwrite2( I, mulFlag, imagei, path, ...
[name], [ext], [nDigits], [nSplits], [spliti], [varargin] )
INPUTS
I - image or array or cell of images (if [] reads else writes)
mulFlag - set to 1 if I represents a stack of images
imagei - first image number
path - directory where images are
name - ['I'] base name of images
ext - ['png'] extension of image
nDigits - [5] number of digits for filename index
nSplits - [1] number of dirs to break data into
spliti - [0] first split (dir) number
writePrms - [varargin] parameters to imwrite
OUTPUTS
I - image or images (read from disk if input I=[])
EXAMPLE
load images; I=images(:,:,1:10); clear IDXi IDXv t video videos images;
imwrite2( I(:,:,1), 0, 0, 'rats/', 'rats', 'png', 5 ); % write 1
imwrite2( I, 1, 0, 'rats/', 'rats', 'png', 5 ); % write 5
I2 = imwrite2( [], 1, 0, 'rats/', 'rats', 'png', 5 ); % read 5
I3 = fevalImages(@(x) x,{},'rats/','rats','png',0,4,5); % read 5
EXAMPLE - multiple splits
load images; I=images(:,:,1:10); clear IDXi IDXv t video videos images;
imwrite2( I, 1, 0, 'rats', 'rats', 'png', 5, 2, 0 ); % write 10
I2=imwrite2( [], 1, 0, 'rats', 'rats', 'png', 5, 2, 0 ); % read 10
See also FEVALIMAGES, FEVALARRAYS
Piotr's Computer Vision Matlab Toolbox Version 2.30
Copyright 2014 Piotr Dollar. [pdollar-at-gmail.com]
Licensed under the Simplified BSD License [see external/bsd.txt]