OPENCV_CREATESAMPLES(1) User Commands OPENCV_CREATESAMPLES(1)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 ran-
domly 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).
OpenCV May 2010 OPENCV_CREATESAMPLES(1)
Check Out this Related Man Page
GLTEXIMAGE2DMULTISAM(3G) OpenGL 3.3 GLTEXIMAGE2DMULTISAM(3G)NAME
glTexImage2DMultisample - establish the data storage, format, dimensions, and number of samples of a multisample texture's image
C SPECIFICATION
void glTexImage2DMultisample(GLenum target, GLsizei samples, GLint internalformat, GLsizei width, GLsizei height,
GLboolean fixedsamplelocations);
PARAMETERS
target
Specifies the target of the operation. target must be GL_TEXTURE_2D_MULTISAMPLE or GL_PROXY_TEXTURE_2D_MULTISAMPLE.
samples
The number of samples in the multisample texture's image.
internalformat
The internal format to be used to store the multisample texture's image. internalformat must specify a color-renderable,
depth-renderable, or stencil-renderable format.
width
The width of the multisample texture's image, in texels.
height
The height of the multisample texture's image, in texels.
fixedsamplelocations
Specifies whether the image will use identical sample locations and the same number of samples for all texels in the image, and the
sample locations will not depend on the internal format or size of the image.
DESCRIPTION
glTexImage2DMultisample establishes the data storage, format, dimensions and number of samples of a multisample texture's image.
target must be GL_TEXTURE_2D_MULTISAMPLE or GL_PROXY_TEXTURE_2D_MULTISAMPLE. width and height are the dimensions in texels of the texture,
and must be in the range zero to GL_MAX_TEXTURE_SIZE - 1. samples specifies the number of samples in the image and must be in the range
zero to GL_MAX_SAMPLES - 1.
internalformat must be a color-renderable, depth-renderable, or stencil-renderable format.
If fixedsamplelocations is GL_TRUE, the image will use identical sample locations and the same number of samples for all texels in the
image, and the sample locations will not depend on the internal format or size of the image.
When a multisample texture is accessed in a shader, the access takes one vector of integers describing which texel to fetch and an integer
corresponding to the sample numbers describing which sample within the texel to fetch. No standard sampling instructions are allowed on the
multisample texture targets.
NOTES
glTexImage2DMultisample is available only if the GL version is 3.2 or greater.
ERRORS
GL_INVALID_OPERATION is generated if internalformat is a depth- or stencil-renderable format and samples is greater than the value of
GL_MAX_DEPTH_TEXTURE_SAMPLES.
GL_INVALID_OPERATION is generated if internalformat is a color-renderable format and samples is greater than the value of
GL_MAX_COLOR_TEXTURE_SAMPLES.
GL_INVALID_OPERATION is generated if internalformat is a signed or unsigned integer format and samples is greater than the value of
GL_MAX_INTEGER_SAMPLES.
GL_INVALID_VALUE is generated if either width or height negative or is greater than GL_MAX_TEXTURE_SIZE.
GL_INVALID_VALUE is generated if samples is greater than GL_MAX_SAMPLES.
SEE ALSO
glTexImage3D(), glTexImage2DMultisample()
COPYRIGHT
Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication
License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.
OpenGL 3.3 03/08/2011 GLTEXIMAGE2DMULTISAM(3G)