Use this method to define the constraints for a blob to be detected. You can add several rules to specify different kinds of blobs.

AddBlobRule (MaxMass As Long, MaxProportion As Long, MinWidth As Long, MaxWidth As Long, MinHeight As Long, MaxHeight As Long, MinSeparation As Long, bDiagonal As Boolean)

MaxMass

Defines the maximum number of pixels for a blob.

MaxProportion

Defines the maximum proportion for a blob. Proportion is the ratio (in percent) of black pixels in comparison to the pixels of the bounding rectangle, which is the minimal rectangle that surrounds a blob. Common ranges for proportions are: hand written signatures 5-30%, handprinted text 20-50%, machine printed text 30-80%.

MinWidth

Defines the minimum width of a blob in pixels.

MaxWidth

Defines the maximum width of a blob in pixels.

MinHeight

Defines the minimum height of a blob in pixels.

MaxHeight

Defines the maximum height of a blob in pixels.

MinSeparation

Minimum distance in pixels between a blob and its neighbors.

bDiagonal

If set to TRUE, diagonal connections are considered in defining a blob. If set to FALSE, only those pixels that are connected horizontally or vertically are considered to define a blob.