The crop area is defined by the (X, Y) top-left corner and the WIDTH and HEIGHT arguments.
All arguments understand supported units.
"""
lines.crop(x, y, x + width, y + height)
return lines
@cli.command(group="Operations")
@click.argument("margin_x", type=vp.LengthType(), required=True)
@click.argument("margin_y", type=vp.LengthType(), required=True)
@click.option(
"-l",
"--layer",
type=vp.LayerType(accept_multiple=True),
default="all",
help="Target layer(s).",
)
@vp.global_processor
def trim(document: vp.Document, margin_x: float, margin_y: float,
layer: Union[int, List[int]]) -> vp.Document:
"""Trim the geometries by some margin.
This command trims the geometries by the provided X and Y margins with respect to the
current bounding box.
By default, `trim` acts on all layers. If one or more layer IDs are provided with the
`--layer` option, only these layers will be affected. In this case, the bounding box is
that of the listed layers.
"""
@click.option(
"-kdt",
"--kdtree_searcher",
is_flag=True,
help=
"Use exact nearest neighbor search with kdtree (slower, but more precise)")
@click.option(
"--cmyk",
is_flag=True,
help=
"Split image to CMYK and process each channel separately. The results are in consecutively numbered layers, starting from `layer`."
)
@click.option(
"-l",
"--layer",
type=vp.LayerType(accept_new=True),
default=None,
help=
"Target layer or 'new'. When CMYK enabled, this indicates the first (cyan) layer.",
)
@vp.global_processor
def vpype_flow_imager(document, layer, filename, noise_coeff, n_fields,
min_sep, max_sep, min_length, max_length, max_size, seed,
flow_seed, search_ef, test_frequency, field_type,
transparent_val, transparent_mask, edge_field_multiplier,
dark_field_multiplier, kdtree_searcher, cmyk):
"""
Generate flowline representation from an image.
The generated flowlines are in the coordinates of the input image,
resized to have dimensions at most `--max_size` pixels.