Add noise to an image.
::add_noise_white adds noise to the image Image. The noise is white noise, equally distributed in the interval [-Amp,Amp], and is generated by using the C function ``drand48'' with an initial time dependent seed. Resulting gray values are clipped to the range [0,255].
|
Image (input_object) |
(multichannel-)image(-array) -> Hobject: HImage(Array) ( byte / int2 ) |
| Input image. | |
|
ImageNoise (output_object) |
(multichannel-)image(-array) -> Hobject * : HImage(Array) ( byte / int2 ) |
| Noisy image. | |
| Number of elements: ImageNoise == Image | |
|
Amp (input_control) |
real -> HTuple.double |
| Maximum noise amplitude. | |
| Default value: 60.0 | |
| Suggested values: 1.0, 2.0, 5.0, 10.0, 20.0, 40.0, 60.0, 90.0 | |
| Typical range of values: 1.0 <= Amp <= 1000.0 | |
| Minimum increment: 1.0 | |
|
Recommended increment: 10.0 | |
| Restriction: Amp > 0 | |
read_image(&Image,"fabrik"); disp_image(Image,WindowHandle); add_noise_white(Image,&ImageNoise,90.0); disp_image(ImageNoise,WindowHandle);
::add_noise_white returns H_MSG_TRUE if all parameters are correct. If the input is empty the behaviour can be set via ::set_system('no_object_result',<Result>). If necessary, an exception handling is raised.
::add_noise_distribution, ::noise_distribution_mean, ::gauss_distribution, ::sp_distribution
Image filters
