Color Blob Detection

## Color Blob Detection
Extract regions in the color image that meet the expected color. Expected color refers to the learned RGB color space value or HSV color space value

## Usage Method
1. Select the color space, then click the "Color Region Extraction" button;
![](/media/202601/2026-01-14_161052_9012870.8387966993812137.png)
2. Move the ROI box to the specified position, learn the RGB value or HSV value in the ROI box
![](/media/202601/2026-01-14_161144_9787500.7040503321736451.png)
3. Filter the results or perform other operations

## Parameter Configuration Description
### Interface Parameters
1. Total Count Judgment: Detect the total number of color Blobs in the ROI box. If it is not within the set range, the extraction is considered failed, otherwise the extraction is successful;
2. Total Area Judgment: Detect the total area of color Blobs in the ROI box. If it is not within the set range, the extraction is considered failed, otherwise the extraction is successful;
![](/media/202601/2026-01-14_161339_2315470.8091970623174903.png)
### Screening
1. Screening refers to screening according to the characteristics of the Blob. Commonly used ones are generally area, length, width and other characteristic values.
2. The operation method defaults to logical AND;
Blob Info: Blob information after color extraction, containing blob features.

![](/media/202601/2026-01-14_161632_0189030.3015010019479619.png)
### Advanced Parameters
Sort the screened blobs

![](/media/202601/2026-01-14_162716_8624000.6331060807184429.png)

## Output Description
Running Result: Output True if the extracted Blob meets the set conditions, otherwise output False;
Blob Count: Total number of extracted Blobs;
Blob Total Area: Total area of extracted Blobs;
Blob Output: Extracted Blob region;
Rotated Rectangle ROI: Input ROI;
Mask Region: The module supports mask operation. If there is a mask, the mask is output;
Center of Gravity Array: Array of center of gravity coordinates of Blobs;
Rotated Rectangle Array: Array of minimum bounding rotated rectangles of Blobs;
Output Coordinate System: Coordinate system output after learning the current Blob coordinates
![](/media/202601/2026-01-14_162743_4899000.2137702184284881.png)

---

Click here to jump to the corresponding Chinese manual page: [Color Blob Detection](/doc/48)