2.6.6.9 imgUserfilter(Pro)

Menu Information

User Filter

Brief Information

Apply user-defined filter to image

Additional Information

This feature is for OriginPro only.

Command Line Usage

1. imgUserfilter fltm:=[Mbook4]Msheet1!Mat(1);

2. imgUserfilter fltm:=[Mbook4]Msheet1!Mat(1) offset:=2 dv :=10 type:=max;

Variables

Display
Name
Variable
Name
I/O
and
Type
Default
Value
Description
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.

Filter Matrix fltm

Input

MatrixObject

<unassigned>

Specifies the matrix that represents the mask used for filtering.

Offset offset

Input

int

0

Specifies a value used to offset the final result of the output.

Divisor dv

Input

int

1

Specifies a value used to divide the final result of the output.

Operation Type type

Input

int

sum

Specifies the type of operation used to get the filtering output.

Option list

  • sum:Sum
Performs sum operation.
  • max:Maximum
Performs maximum operation.
  • min:Minimum
Performs minimum operation.

Description

Although OriginPro offers many manipulable tools to process images, user-defined spatial filters can process an image flexibly, allowing you to apply various effects on images.

The imgUserfilter function filters the input image using a user-defined mask. With this function, customer can create a user-defined spatial filter and apply it to the image. The selected filter is passed as a parameter to this function. The filter has a rectangular form (matrix) where the values are user-defined. It allows the creation of simple customized filters, where each value found in matrix is multiplied by the corresponding pixel, and then the specified operation is performed on the results.

User-defined filter dialog.png

Examples

In this example, we use the imgUserfilter function to apply a user-defined filter to the input image:

  1. Create a new matrix for the mask.
  2. From the menu, select Matrix: Set Dimensions to open the dialog of mdim. Set Columns to 3 and Rows to 3. Click OK to close the dialog.
  3. Enter the values for this matrix as the screenshot below:
    ImgUserfilter help English files image002.jpg
  4. Create another matrix and import myocyte2.tif under \Samples\Image Processing and Analysis folder into it.
  5. When this image is active, select Image: Spatial Filters: User Filter to open the dialog of the imgUserfilter X-Function.
  6. In the dialog, change the settings as the screenshot below and click OK to close the dialog.
    ImgUserfilter help English files image004.jpg
    A new image is created. We can see that the edges and details are enhanced.
ImgUserfilter help English files image006.jpg
ImgUserfilter help English files image008.jpg
The original image
The output image


Algorithm

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

References

LEADTOOLS Main API Help file, Version 14

Related X-Functions

imgMedian, imgAverage, imgSharpen