Visual Functions

detect_checkbox

detect_checkbox(anchors, relative_positions)

See docs for detect_checkbox_fn_v

detect_signature

detect_signature(anchors, relative_positions)

See docs for detect_signature_fn_v

extract_image_crop

extract_image_crop(value)

Gets an image patch of the input value as a base64-encoded string.



Args:

    value (Value[Text]): A provenance-tracked value to extract a patch of



Returns:

    Returns a base64-encoded string of the extracted image patch



Examples:

    extract_image_crop(list_get(match(INPUT_COL, '[SIGN]'), 0))

    -> '/9j/4AAQSkZ...'

image_crop_relative

image_crop_relative(anchors, relative_positions)

Gets an image patch relative to an anchor as a base64-encoded string



Args:

    anchors (List<Value>): An n-length list of provenance-tracked anchors

    relative_positions (List<List<float>>): An n-length list of lists that define a relative

      positions. Each relative position uses the format [top-left x, top-left y,

      bottom-right-x, bottom-right-y]



Returns:

    Returns a base64-encoded string of the extracted image patch



Examples:

    image_crop_relative([list_get(match(INPUT_COL, 'Anchor'), 0)], [[-2, 0.05,

      -1, 1.05]]) -> '/9j/4AAQSkZJRgABA...'

image_decode_checkbox

image_decode_checkbox(image)

Determines whether an image of just a checkbox is checked



Args:

    image (str): A base64-encoded string that only contains a checkbox



Returns:

    Returns True if the checkbox is checked and false if it is not



Examples:

    image_decode_checkbox('/9j/4AAQSkZ...') -> True

image_decode_signature

image_decode_signature(image)

Determines whether an image of just a signature is signed



Args:

    image (str): A base64-encoded string that only contains a signature region



Returns:

    Returns True if the region is signed



Examples:

    image_decode_signature('/9j/4AAQSkZ...') -> True