knittingpattern/convert/image_to_knittingpattern.py
def convert_image_to_knitting_pattern(path, colors=("white", "black")):
    """Load a image file such as a png bitmap of jpeg file and convert it
    to a :ref:`knitting pattern file <FileFormatSpecification>`.

    :param list colors: a list of strings that should be used as
      :ref:`colors <png-color>`.
    :param str path: ignore this. It is fulfilled by the loeder.

    Example:

    .. code:: python

        convert_image_to_knitting_pattern().path("image.png").path("image.json")
    """
    image = PIL.Image.open(path)
    pattern_id = os.path.splitext(os.path.basename(path))[0]
    rows = []
    connections = []
    pattern_set = {
        "version": "0.1",
        "type": "knitting pattern",
        "comment": {
            "source": path
        },
        "patterns": [
            {
                "name": pattern_id,
                "id": pattern_id,
                "rows": rows,
                "connections": connections
            }
        ]}
    bbox = image.getbbox()
    if not bbox:
        return pattern_set
    white = image.getpixel((0, 0))
    min_x, min_y, max_x, max_y = bbox
    last_row_y = None
    for y in reversed(range(min_y, max_y)):
        instructions = []
        row = {"id": y, "instructions": instructions}
        rows.append(row)
        for x in range(min_x, max_x):
            if image.getpixel((x, y)) == white:
                color = colors[0]
            else:
                color = colors[1]
            instruction = {"color": color}
            instructions.append(instruction)
        if last_row_y is not None:
            connections.append({"from": {"id": last_row_y}, "to": {"id": y}})
        last_row_y = y
    return pattern_set
def convert_image_to_knitting_pattern(path, colors=("white", "black")):
    """Load a image file such as a png bitmap of jpeg file and convert it
    to a :ref:`knitting pattern file <FileFormatSpecification>`.

    :param list colors: a list of strings that should be used as
      :ref:`colors <png-color>`.
    :param str path: ignore this. It is fulfilled by the loeder.

    Example:

    .. code:: python

        convert_image_to_knitting_pattern().path("image.png").path("image.json")
    """
    image = PIL.Image.open(path)
    pattern_id = os.path.splitext(os.path.basename(path))[0]
    rows = []
    connections = []
    pattern_set = {
        "version": "0.1",
        "type": "knitting pattern",
        "comment": {
            "source": path
        },
        "patterns": [
            {
                "name": pattern_id,
                "id": pattern_id,
                "rows": rows,
                "connections": connections
            }
        ]}
    bbox = image.getbbox()
    if not bbox:
        return pattern_set
    white = image.getpixel((0, 0))
    min_x, min_y, max_x, max_y = bbox
    last_row_y = None
    for y in reversed(range(min_y, max_y)):
        instructions = []
        row = {"id": y, "instructions": instructions}
        rows.append(row)
        for x in range(min_x, max_x):
            if image.getpixel((x, y)) == white:
                color = colors[0]
            else:
                color = colors[1]
            instruction = {"color": color}
            instructions.append(instruction)
        if last_row_y is not None:
            connections.append({"from": {"id": last_row_y}, "to": {"id": y}})
        last_row_y = y
    return pattern_set
Load a image file such as a png bitmap of jpeg file and convert it
    to a :ref:`knitting pattern file <FileFormatSpecification>`.

    :param list colors: a list of strings that should be used as
      :ref:`colors <png-color>`.
    :param str path: ignore this. It is fulfilled by the loeder.

    Example:

    .. code:: python

        convert_image_to_knitting_pattern().path("image.png").path("image.json")