lifeles666 / mnisten

convert image files to mnist idx format

mnisten : image files to idx format converter

mnisten is a library to convert image files to idx format binaries.

• assign label id automatically by directory-name (lexicographical order)
• auto resizing
• random-shuffling
• generate train/test file

#example

image files:

.\
|--foo
|   |--a.bmp
|   |--b.bmp
|   +--1.txt
+--bar
    |--c.bmp
    |--d.bmp
    +--buzz
         +--e.bmp

• a and b.bmp => label 1
• c and d.bmp => label 0
• 1.txt and e.bmp => ignored

#usage

mnisten -d .\ -o prefix -s 32x24

then create:

• prefix_train_images.idx3
• prefix_train_labels.idx1
• label.txt
  • log directory-name => label-id

option	parameters	meaning	required	default
--dir,-d	directory-name(string)	root directory of images	yes	-
--output,-o	prefix(string)	prefix of output idx files	no	""
--num-tests,-n	num(int)	number of test data (if 0, all images are treated as training data)	no	0
--size,-s	WxH(string)	size of each image data	no	32x32

#prerequisites

• OpenCV
• boost (boost/filesystem)

#build

make

or build vc/mnisten.sln