EasyImage::Contour

Follows the contour of an object.

Namespace: Euresys::Open_eVision

Parameters

sourceImage

Pointer to the source image/ROI.

contourMode

Traversal mode, as defined by EContourMode.

startX

Start point abscissa.

startY

Start point ordinate.

thresholdMode

Thresholding mode as defined by EThresholdMode.

threshold

Threshold level.

connexity

Contour connexity, as defined by EConnexity.

path

Pointer to the destination vector.

freeman

Specifies if Freeman codes are to be retrieved rather than pixel values.

Remarks

A threshold is applied so that objects become blobs. The contour is a closed or not (see property Get/SetClosed) connected path, forming the boundary of the blob.
When destination vector is an EBW8PathVector or a EBW16PathVector, this vector can contain two different information. If the bFreeman argument is false, which is the default value, member m_bw8(16)Pixel in the vector elements contains the gray-level value of the contour pixels. If it is true, the member instead gives the Freeman code leading from a pixel to next. The Freeman codes are numbered from 0 in the horizontal direction and incremented anticlockwise.
Freeman code, leading from a pixel to another adjacent pixel