NAME
opencv_createsamples - create training and testing samples
SYNOPSIS
opencv_createsamples [options]
DESCRIPTION
opencv_createsamples creates positive samples from a single object
image or a collection of positive images.
The scheme of test samples creation is similar to training samples
creation since each test sample is a background image into which a
randomly distorted and randomly scaled instance of the object picture
is pasted at a random position.
OPTIONS
opencv_createsamples supports the following options:
-info collection_file_name
A database of positive source images. Use it together with -img
to create test samples instead.
-img image_file_name
A positive source image. Use it together with -info to create
test samples instead.
-vec vec_file_name
The output file name containing the generated positive samples
for training.
-bg background_file_name
The background description file (the negative sample set). It
contains a list of images into which randomly distorted versions
of the object are pasted for positive sample generation.
-num number_of_samples
The number of positive samples to generate/train. The default is
1000.
-bgcolor background_color
The background color (currently grayscale images are assumed);
the background color denotes the transparent color. The default
is 0.
-inv Invert the colors.
-maxidev max_intensity_deviation
The desired maximum intensity deviation of foreground
samples pixels. The default is 40.
-maxxangle max_x_rotation_angle
The maximum rotation angle in x-direction in radians. The
default is 1.1.
-maxyangle max_y_rotation_angle
The maximum rotation angle in y-direction in radians. The
default is 1.1.
-maxzangle max_z_rotation_angle
The maximum rotation angle in z-direction in radians. The
default is 0.5.
-show [scale_factor]
Show each created sample during the creation process.
Optionally a scaling factor can be defined. The default
is 4.0.
If <ESC> is pressed, the creation process will continue
without showing the samples. This can be useful for
debugging purposes.
-h sample_height
For the creation of training samples, it is the resulting
sample height. The default is 24.
In case of creating test samples, it is the minimal
height of placed object picture.
-w sample_width
For the creation of training samples, it is the resulting
sample width. The default is 24.
In case of creating test samples, it is the minimal width
of placed object picture.
The same information is shown, if opencv_createsamples is called
without any arguments/options.
EXAMPLES
To create training samples from one image applying distortions
and show the results:
opencv_createsamples -img source.png -num 10 -bg
negatives.dat -vec samples_out.vec -show
To create training samples of size 40x40 from some images
without applying distortions:
opencv_creasamples -info source.dat -vec samples_out.vec
-w 40 -h 40
SEE ALSO
opencv_haartraing(1), opencv_performance(1)
More information and examples can be found in the OpenCV
documentation.
AUTHORS
This manual page was written by Daniel Leidert
<daniel.leidert@wgdd.de> and Nobuhiro Iwamatsu
<iwamatsu@debian.org> for the Debian project (but may be used by
others).