This is the command opencv_createsamples that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
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
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