2.6.6.4 imgGaussian

Menu Information

Gaussian

Brief Information

Apply Gaussian filter to image

Command Line Usage

1. imgGaussian r:=20 img:=mat(1) oimg:=mat(2);

2. imgGaussian r:=10 oimg:=<new>;

Variables

Display
Name
Variable
Name
I/O
and
Type
Default
Value
Description
Radius r

Input

int

5

Specifies the size of the neighborhood on which the Gaussian filter is applied. This value cannot be less than 1.

Input Matrix img

Input

Image

<active>

Specifies the source image to be manipulated. The default input is the active image.

Output Image oimg

Output

Image

<input>

Specifies the output image. By default, the output image is the same as the input image.

See the syntax here.

Description

The imgGussian function applies a Gaussian filter to the input image. The filtered image is blurred and looks smoother than the input image.

User can specify the radius of the filtering neighborhood. Generally speaking, a larger radius will result in a smoother image compared to a smaller radius.

Examples

In this example, we use the imgGaussian function to blur the input image:

  1. When the image is active, select Image: Spatial Filters: Gaussian to open the dialog of the X-Function.
  2. In the dialog, change the settings as the screenshot below and click OK to close the dialog.
    ImgGaussian help English files image002.jpg
    A new image is created. It is the filtered image.
ImgGaussian help English files image004.jpg
ImgGaussian help English files image006.jpg
The original image
The output image


Algorithm

The computation uses L_GaussianFilterBitmap() function from LEADTOOLS Main API. Please refer to the LEADTOOLS Main API Help file, Version 14 and read the L_GaussianFilterBitmap topic.

References

LEADTOOLS Main API Help file, Version 14

Related X-Functions

imgMedian, imgAverage, imgNoise