3D Contour Inflection Point

Operator Function

Obtain the coordinates of inflection points on the contour that meet the requirements.

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
Use Region Parameters	true/false	false	If enabled, use Region as input; if not enabled, use Input Image as input
Region			Select input contour
Search Type	-X/+X/-Z/+Z	+X	-X: Search for leftmost inflection point +X: Search for rightmost inflection point -Z: Search for bottommost inflection point +Z: Search for topmost inflection point
Noise Removal		0.000	Enable: If enabled, filter out inflection points with small jumps Threshold: Minimum difference to filter out interference points in Z direction

Result Display

Parameter	Range	Default Value	Description	Illustration
Inflection Point	true/false	false	Extracted inflection point; if enabled, displayed in the image

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
inflection_point	point1d		Output inflection point

Tip

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

Exception Troubleshooting

No.	Exception Information	Corresponding Parameter	Solution
1	Failed to get feature points in crop region		Adjust start and end parameters of point acquisition region to ensure valid points exist in selected area
2	Input region type is {0}, invalid region type	Region Type	Input region type must be 1D Window
3	Invalid region parameters for point acquisition		Adjust region parameters so input point cloud in region is not empty
4	No inflection point found		Adjust inflection point related parameters
5	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

Example Introduction

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

2. Select the 3D Contour Extraction tool to extract required contour into IM1;

3. Select the 3D Contour Inflection Point 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. Either do not enable Use Region Parameters, or enable region and select region type as 1D Window, move the 1D Window to the position to be measured, enclosing the contour to be measured.

3. Set parameters

4. Check the content you want to display in the result display section

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

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