key can be one of [list, tuple, str]

get all keys of the data

Creates a generator to extract data from the queue. Skip the data if it is `None`. # Yields tuple of data in the

:param cfg_item: a sub cfg item in default.yml, it should contain enable and fraction. such as prydown: enabl

create operators based on the config Args: params(list): a dict list, used to create some operators mod(module) : a module t

Initialize logger and set its verbosity level to INFO. Args: name (str): the root module name of this logger output (str): a

Helper function to scale `val` between 0 and maxval. Args: level: Level of the operation that will be between [0, `PARAMETER_MAX`]. ma

With 50% prob, negate the value

Helper function to scale `val` between 0 and maxval . Args: level: Level of the operation that will be between [0, `PARAMETER_MAX`]. m

Download from given url to root_dir. if file or directory specified by url is exists under root_dir, return the path directly, otherwise down

Get word size removed offset :param font: truetype :param word: :return: size: word size, removed offset

Whether path is URL. Args: path (string): URL string or not.

Recursively replace dict of list Args: dl(dict or list): dict or list to be replaced ks(list): list of keys v(str): v

_unpack

:param word_img: word image with big background :param text_box_pnts: left-top, right-top, right-bottom, left-bottom of text word

:param mu: 均值 :param sigma3: 3 倍标准差， 99% 的数据落在 (mu-3*sigma, mu+3*sigma) :return:

convert text-index into text-label.

:param img: gray image, will be convert to BGR image :param pnts: left-top, right-top, right-bottom, left-bottom :param color: :retur

Get model path from WEIGHTS_HOME, if not exists, download it from url.

percent: 0 ~ 1, e.g: 如果 percent=0.1，有 10% 的可能性

key: str value: an object

To calculate the affine matrix, three pairs of points are required. This function is used to get the 3rd point, given 2D points a & b. The 3r

box_score_fast: use bbox mean score as the mean score

create operators based on the config Args: params(list): a dict list, used to create some operators

Crop text from large input image :param img: image to crop :param text_box_pnts_transformed: text_bbox_pnts after apply_persp

:param x/y: 应该是移除了 offset 的

If random_space applied, text_x, text_y, word_width, word_height may change

:param x/y: 应该是移除了 offset 的

Generate random background

Get the affine transform matrix, given the center/scale/rot/output_size. Args: center (np.ndarray[2, ]): Center of the bounding box (x, y

Only use word roi area to get word color

Returns: bool: Whether the worker theads are running.

Load config from file. Args: file_path (str): Path of the config file to be loaded. Returns: global config

Get random left-top point for putting a small rect in a large rect. Normally dst_height>src_height and dst_width>src_width

Samples a mean lambda from beta distribution parametrised by alpha, creates a low frequency image and binarises it based on this lambda :par

Download from url, save to path. url (str): download url path (str): download to given path