change_radial_distortion_image — Change the radial distortion of an image.
change_radial_distortion_image(Image, Region : ImageRectified : CamParamIn, CamParamOut : )
change_radial_distortion_image changes the radial distortion
of the input image Image in accordance to the internal camera
parameters CamParamIn and CamParamOut. Each pixel of
the output image that lies within the region Region is
transformed into the image plane using
CamParamOut and subsequently projected into a subpixel of
Image using CamParamIn.
The resulting gray value is determined by
bilinear interpolation. If the subpixel is outside of Image,
the corresponding pixel in ImageRectified is set to 'black'
and eliminated from the image domain.
If the gray values of all pixels in the output image shall be
calculated, it is sufficient to pass an empty object in
Region (which must be previously generated by, for example,
using gen_empty_obj). This is especially useful if the size
of the output image differs from the size of the input image, and
hence, it is not possible to simply pass the region of the input
image in Region.
If CamParamOut was computed via
change_radial_distortion_cam_par, ImageRectified
is equivalent to Image obtained with a lens with a modified
radial distortion. If the image
is rectified. A subsequent pose estimation (determination of the
external camera parameters) is not affected by this operation.
Please note that change_radial_distortion_image does not
work for line scan cameras with perspective lenses. Instead, you
might want to use image_to_world_plane.
change_radial_distortion_image can be executed on OpenCL devices if
the input image does not exceed the maximum size of image objects of the
selected device. As the OpenCL implementation uses single precision
arithmetic, the results can differ from the CPU implementation.
Image (input_object) (multichannel-)image(-array) → object (byte / uint2 / real)
Original image.
Region (input_object) region → object
Region of interest in ImageRectified.
ImageRectified (output_object) (multichannel-)image(-array) → object (byte / uint2 / real)
Resulting image with modified radial distortion.
CamParamIn (input_control) campar → (real / integer / string)
Internal camera parameter for Image.
CamParamOut (input_control) campar → (real / integer / string)
Internal camera parameter for Image.
change_radial_distortion_image returns 2 (H_MSG_TRUE) if all parameter
values are correct. If the input is empty (no input image is
available) the behavior can be set via
set_system('no_object_result',<Result>). If necessary, an
exception is raised.
change_radial_distortion_cam_par,
read_image,
grab_image
change_radial_distortion_cam_par,
camera_calibration,
read_cam_par,
change_radial_distortion_contours_xld,
change_radial_distortion_points
Calibration