2D Blob

Operator Function

Find line segments in the ROI of the input image

Parameter Introduction

Input Parameters

Parameter	Range	Default Value	Description	Illustration
Input Image	0-8	0	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 disabled, use input image as input
Region	2D Window	2D Window	Set the range of the search area
Minimum Blob Area	0-10000000	1000.000	Minimum blob area to find
Maximum Blob Area	0-10000000	10000.000	Maximum blob area to find
Search Quantity	1-50	10	Number of blobs to find
Polarity	Brighter than background/Darker than background/Both	Both	Brighter than background: Find high brightness blobs Darker than background: Find low brightness blobs Both: Find both high and low brightness blobs
Binarization Threshold	1-255	90.000	Threshold for image binarization
Fill Holes	true/false	false	Minimum hole area: Fill holes smaller than this value
Bounding Rectangle Type	Axis-aligned rectangle	Axis-aligned rectangle	Axis-aligned rectangle: Select axis-aligned bounding rectangle
Area Sorting	Descending/Ascending	Descending	Descending: Sort blob areas in descending order Ascending: Sort blob areas in ascending order

Result Display

Parameter	Range	Default Value	Description	Illustration
Index	true/false	false	If enabled, display numbers and information on IM image
Window	true/false	false	If enabled, display bounding rectangles of found blob regions on IM image

Output Parameters

Name	Type	Range	Description
Result	bool	true/false	true for success false for failure
Warning	bool	true/false	true indicates a warning false indicates no warning
Message	string		Output success, error, or warning messages. Empty if no error or warning.
Time	float		Operator execution time, unit: ms
area_array	float[]		Area of found blobs
window_array	group		Bounding rectangle information of found blobs

Exception Troubleshooting

No.	Exception Information	Corresponding Parameter	Solution
1	Input value is {0}, invalid region type	Region type	Only window2d supported
2	No suitable inflection points found		1. Check area range 2. Check polarity
3	Input image is empty		Check if input image is empty

Example Introduction

Engineering Design

1. Select the Load Image tool to load the required 2D image.

2. Select the 2D Blob tool.

Tool Usage

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

2. Move the window to the position to be measured, enclosing the image to be tested.

::: Warning Tips 1. Use the ROI controller on the image window to drag or scale the window; 2. Directly modify the window's start or end point coordinates in the calculation parameters to adjust the window position and size; :::

3. Set the 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. Run the operator in the run list, and then view the running results in the corresponding IM.