BlobsComponent

Detects the blobs in an image. A blob is an 8-connected component of non-black pixels (0 on every channel, including in color spaces with multiple representations of black) in an image. Only the bounding rectangles and number of pixels in the blob are detected.

Inputs

Primary (Buffer): the image to find blobs in. This should usually be a black/white image, like the results of a filter.

Outputs

• Default channel (multiple, Blob): the blobs found
• vec (single, Vec<Blob>): the blobs found, collected into a vector

Configuration

Appears in configuration files with type = "blobs".

Additional fields:

• min-w: the minimum width of detected blobs
• max-w: the maximum width of detected blobs
• min-h: the minimum height of detected blobs
• max-h: the maximum height of detected blobs
• min-px: the minimum pixel count of detected blobs
• max-px: the maximum pixel count of detected blobs
• min-fill: the minimum fill ratio (pixels / (width × height)) of detected blobs
• max-fill: the maximum fill ratio of detected blobs
• min-aspect: the minimum aspect ratio (height / width) of detected blobs
• max-aspect: the maximum aspect ratio of detected blobs

All fields are optional, and if unset, default to the most permissive values.