simulate_defocussimulate_defocusSimulateDefocusSimulateDefocussimulate_defocus (Operator)

Name

simulate_defocussimulate_defocusSimulateDefocusSimulateDefocussimulate_defocus — Simulate an uniform out-of-focus blurring of an image.

Signature

simulate_defocus(Image : DefocusedImage : Blurring : )

Description

simulate_defocussimulate_defocusSimulateDefocusSimulateDefocussimulate_defocus simulates out-of-focus blurring of an image. All parts of the image are blurred uniformly. BlurringBlurringBlurringblurringblurring specifies the extent of blurring by defining the “blur radius” (out-of-focus blurring maps each image pixel on a small circle with a radius of BlurringBlurringBlurringblurringblurring - specified in “number of pixels”). If specified less than null, the absolute value of BlurringBlurringBlurringblurringblurring is used. Simulation of blurring is done by a convolution of the image with a blurring specific impulse response. The convolution is realized by multiplication in the Fourier domain.

Execution Information

Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Automatically parallelized on tuple level.
Automatically parallelized on channel level.

Parameters

ImageImageImageimageimage (input_object) (multichannel-)image(-array) → object (byte / direction / cyclic / int1 / int2 / uint2 / int4 / real)

Image to blur.

DefocusedImageDefocusedImageDefocusedImagedefocusedImagedefocused_image (output_object) image(-array) → object (real)

Blurred image.

BlurringBlurringBlurringblurringblurring (input_control) real → (real)

Degree of blurring.

Default: 5.0

Suggested values: 1.0, 5.0, 10.0, 15.0, 18.0

Result

simulate_defocussimulate_defocusSimulateDefocusSimulateDefocussimulate_defocus returns 2 ( H_MSG_TRUE) if all parameters are correct. If the input is empty simulate_defocussimulate_defocusSimulateDefocusSimulateDefocussimulate_defocus returns with an error message.

Possible Predecessors

gen_psf_defocusgen_psf_defocusGenPsfDefocusGenPsfDefocusgen_psf_defocus, simulate_motionsimulate_motionSimulateMotionSimulateMotionsimulate_motion, gen_psf_motiongen_psf_motionGenPsfMotionGenPsfMotiongen_psf_motion

Possible Successors

wiener_filterwiener_filterWienerFilterWienerFilterwiener_filter, wiener_filter_niwiener_filter_niWienerFilterNiWienerFilterNiwiener_filter_ni

References

Reginald L. Lagendijk, Jan Biemond: Iterative Identification and Restoration of Images, Kluwer Academic Publishers Boston/Dordrecht/London, 1991
M. Lückenhaus:“Grundlagen des Wiener-Filters und seine Anwendung in der Bildanalyse”; Diplomarbeit; Technische Universität München, Institut für Informatik; Lehrstuhl Prof. Radig; 1995.

Module

Foundation

Operators