Functions of cvblob library
Inheritance Hierarchy
OpenCvSharp.BlobCvBlobLib
Namespace: OpenCvSharp.Blob
Assembly: OpenCvSharp.Blob (in OpenCvSharp.Blob.dll) Version: 1.0.0.0 (1.0.0.0)
Syntax
The CvBlobLib type exposes the following members.
Methods
| Name | Description | |
|---|---|---|
  | BlobMeanColor |
Calculates mean color of a blob in an image.
|
| CalcAngle |
Calculates angle orientation of a blob.
This function uses central moments so cvCentralMoments should have been called before for this blob. (cvAngle)
|
| CalcCentroid |
Calculates centroid.
Centroid will be returned and stored in the blob structure. (cvCentroid)
|
| ContourChainCodePerimeter |
Calculates perimeter of a chain code contour.
|
| ContourPolygonArea |
Calculates area of a polygonal contour.
|
| ContourPolygonCircularity |
Calculates the circularity of a polygon (compactness measure).
|
| ContourPolygonPerimeter |
Calculates perimeter of a chain code contour.
|
| ConvertChainCodesToPolygon |
Convert a chain code contour to a polygon.
|
| FilterByArea |
Filter blobs by area.
Those blobs whose areas are not in range will be erased from the input list of blobs. (cvFilterByArea)
|
| FilterByLabel |
Filter blobs by label.
Delete all blobs except those with label l.
|
| FilterLabels |
Draw a binary image with the blobs that have been given. (cvFilterLabels)
|
| GetLabel |
Get the label value from a labeled image.
|
| GreaterBlob |
Find greater blob. (cvGreaterBlob)
|
| Label |
Label the connected parts of a binary image. (cvLabel)
|
| LargestBlob |
Find the largest blob. (cvLargestBlob)
|
| PolygonContourConvexHull |
Calculates convex hull of a contour.
Uses the Melkman Algorithm. Code based on the version in http://w3.impa.br/~rdcastan/Cgeometry/.
|
| RenderBlob(LabelData, CvBlob, IplImage, IplImage) |
Draws or prints information about a blob.
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| RenderBlob(LabelData, CvBlob, IplImage, IplImage, RenderBlobsMode) |
Draws or prints information about a blob.
|
| RenderBlob(LabelData, CvBlob, IplImage, IplImage, RenderBlobsMode, CvScalar) |
Draws or prints information about a blob.
|
| RenderBlob(LabelData, CvBlob, IplImage, IplImage, RenderBlobsMode, CvScalar, Double) |
Draws or prints information about a blob.
|
| RenderBlobs(CvBlobs, IplImage, IplImage) |
Draws or prints information about blobs. (cvRenderBlobs)
|
| RenderBlobs(CvBlobs, IplImage, IplImage, RenderBlobsMode) |
Draws or prints information about blobs. (cvRenderBlobs)
|
| RenderBlobs(CvBlobs, IplImage, IplImage, RenderBlobsMode, Double) |
Draws or prints information about blobs. (cvRenderBlobs)
|
| RenderContourChainCode(CvContourChainCode, IplImage) |
Draw a contour.
|
| RenderContourChainCode(CvContourChainCode, IplImage, CvScalar) |
Draw a contour.
|
| RenderContourPolygon(CvContourPolygon, IplImage) |
Draw a polygon.
|
| RenderContourPolygon(CvContourPolygon, IplImage, CvScalar) |
Draw a polygon.
|
| RenderTracks(CvTracks, IplImage, IplImage) |
Prints tracks information.
|
| RenderTracks(CvTracks, IplImage, IplImage, RenderTracksMode) |
Prints tracks information.
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| RenderTracks(CvTracks, IplImage, IplImage, RenderTracksMode, CvFont) |
Prints tracks information.
|
| SaveImageBlob |
Save the image of a blob to a file.
The function uses an image (that can be the original pre-processed image or a processed one, or even the result of cvRenderBlobs, for example) and a blob structure.
Then the function saves a copy of the part of the image where the blob is.
|
| SetImageRoItoBlob |
Set the ROI of an image to the bounding box of a blob.
|
| SimplifyPolygon(CvContourPolygon) |
Simplify a polygon reducing the number of vertex according the distance "delta".
Uses a version of the Ramer-Douglas-Peucker algorithm (http://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm).
|
| SimplifyPolygon(CvContourPolygon, Double) |
Simplify a polygon reducing the number of vertex according the distance "delta".
Uses a version of the Ramer-Douglas-Peucker algorithm (http://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm).
|
| UpdateTracks(CvBlobs, CvTracks, Double, Int32) |
Updates list of tracks based on current blobs.
|
| UpdateTracks(CvBlobs, CvTracks, Double, Int32, Int32) |
Updates list of tracks based on current blobs.
|
| WriteContourPolygonCsv |
Write a contour to a CSV (Comma-separated values) file.
|
| WriteContourPolygonSvg(CvContourPolygon, String) |
Write a contour to a SVG file.
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| WriteContourPolygonSvg(CvContourPolygon, String, CvScalar, CvScalar) |
Write a contour to a SVG file.
|
Fields
| Name | Description | |
|---|---|---|
 | DepthLabel |
Size of a label in bits.
|
See Also