3D Gaussian Filter

Operator Function

Gaussian filter uses the weighted average of neighboring points to replace the original value at the query point, thereby smoothing the point cloud.

Parameter Introduction

Input Parameters

Parameter	Range	Default Value	Description	Illustration
Input Image	0-8	0	The IM number for image input

Calculation Parameters

Parameter	Range	Default Value	Description	Illustration
Standard Deviation		4.000	Standard deviation determines the width of the Gaussian function. Larger standard deviation results in more uniform weight distribution, similar to mean filtering; smaller standard deviation results in weights more concentrated around the query point, similar to median filtering.
Distance Threshold Multiplier		3.000	This value is mainly used to filter outliers that are far from the current query point. Generally, this parameter does not need adjustment.
Search Radius		0.010	Search radius determines the filtering range of the Gaussian filter. Larger radius values result in stronger smoothing effects; smaller radius values result in less noticeable smoothing effects. > Note: The search radius should not be too large, as excessively large search radius values can cause point cloud distortion.
Output Image	0-8	0	The IM number for image output

Output Parameters

Name	Type	Range	Description
Result	bool	true/false	true for success false for failure
Warning	bool	true/false	true indicates there is a warning false indicates there is none
Message	string		Outputs success, error, or warning information; if there is no error or warning, it is empty
Time	float		Operator execution time, unit: ms

Exception Troubleshooting

No.	Exception Information	Corresponding Parameter	Solution
1	3D Gaussian filtering failed		Check if search radius parameter is less than 0
2	Output point cloud is empty, please modify parameters		1. Check if input point cloud is empty 2. Check if point cloud contains invalid values 3. Check if search radius is set too small
3	Input point cloud is empty		Check if input point cloud is empty

Example Introduction

Engineering Design

1. Select the Load 3D Point Cloud tool to load the 3D point cloud image to be processed into IM0.

2. Select the 3D Gaussian Filter tool.

Tool Usage

1. Select the input image for operation; the image number must match the IM number where the image is located in the project.

2. Set parameters

3. Click Test to check if the image window and parameters meet expectations

4. If there are no issues, click Save, then run the operator in the run list to view the results in the corresponding IM