3D Point Cloud Comparison

Operator Function

Select input point cloud and template point cloud, input distance threshold, will output points that do not match the template point cloud beyond the distance threshold

As shown in the figure below: In the left image, red points represent the template point cloud, green points represent the input point cloud. After setting the threshold (threshold greater than d), the output point cloud is shown in the right image

Parameter Introduction

Input Parameters

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

Calculation Parameters

Parameter	Range	Default Value	Description	Illustration
Distance Threshold		0.200	Set distance threshold; points within this threshold distance from template points will be removed
Output Image		2	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

Tip

For more detailed explanations of parameter types, please refer to Type Definitions

Exception Troubleshooting

No.	Exception Information	Corresponding Parameter	Solution
1	Input point cloud is empty		Confirm if IM contains valid points; if no valid points, load point cloud or switch to IM with valid points
2	Output point cloud is empty		1. Reduce distance threshold 2. If empty when distance threshold is large, check if input and output have similar parts

Example Introduction

Engineering Design

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

2. Select the Load Point Cloud tool to load the second 3D point cloud image into IM1.

3. Select the 3D Point Cloud Comparison tool.

Tool Usage

1. Select the input image for operation and the target point cloud for comparison; the image numbers must match the IM numbers where the images are 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