Blob Analysis
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Function
This Step binarizes the input image, detects Blobs in the image, calculates their contours, pixel-wise areas, circularity, and rectangularity, and validates the Blobs one by one according to the set standard.
Input and Output
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Input:
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Image input to this port will be binarized and have Blob(s) calculated.
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2D transformation input at this port is used to transform the ROI set in a previous execution to the appropriate position.
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Output:
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Visualization image.
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Pixel-wise coordinates of Blobs’ contours’ vertices.
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Pixel-wise coordinates of the Blobs’ min circumscribed rectangles’ vertices.
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Number of Blobs output.
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Pixel-wise areas of Blobs.
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Circularity values of the Blobs obtained by dividing the areas of the Blobs by the areas of circles whose perimeters are the perimeters of the Blobs.
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Rectangularity values of the Blobs obtained by dividing the areas of the Blobs by their minimum circumscribed rectangles’ areas.
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Validation result Boolean list of the output Blobs. The validation rules are set by the parameters under “Validation Settings”.
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Mask images of the Blobs. The non-zero pixel value regions are the masks.
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