Connected Components

lastmod 2022-07-12created 2022-07-127 edits

It doesn't just find edges and fill them in; it separates and recognizes each object.

object detection using connected component

• SKKU Outsider's Silly Programming :: OpenCV , find connected component

In cases like this, where the original foreground comes out as edges only, and so on

Contours are clearly found and separated like this.

In other words, it doesn't just find edges and fill them in; it separates out each object.

For the OpenCV API, use the following:

CVAPI(CvSeq*) cvSegmentFGMask( CvArr *fgmask, int poly1Hull0 CV_DEFAULT(1),
                               float perimScale CV_DEFAULT(4.f),
                               CvMemStorage* storage CV_DEFAULT(0),
                               CvPoint offset CV_DEFAULT(cvPoint(0,0)));

See also

• Image Processing
• Image Contours (image contour extraction)

Favorite site

• OpenCV , find connected component ¹
• QUICK AND EASY CONNECTED COMPONENT (BLOB) USING OPENCV
• OpenCV cv::connectedComponents method reference
• openCV labeling example (connectedComponentsWithStats)
• OpenCV #7-4 Example (extracting component contours)

References