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ImageMorph.cpython-310.pyc
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o Z#�a] � @ sL d dl Z ddlmZmZ dZg d�Zg d�ZG dd� d�ZG d d � d �ZdS ) � N� )�Image� _imagingmorphi ) � � r � � r � � � ) r r r r r r r r r c @ �J e Zd ZdZddd�Zdd� Zdd� Zd d � Zd d � Zd d� Z dd� Z dS )� LutBuilderaT A class for building a MorphLut from a descriptive language The input patterns is a list of a strings sequences like these:: 4:(... .1. 111)->1 (whitespaces including linebreaks are ignored). The option 4 describes a series of symmetry operations (in this case a 4-rotation), the pattern is described by: - . or X - Ignore - 1 - Pixel is on - 0 - Pixel is off The result of the operation is described after "->" string. The default is to return the current pixel value, which is returned if no other match is found. Operations: - 4 - 4 way rotation - N - Negate - 1 - Dummy op for no other operation (an op must always be given) - M - Mirroring Example:: lb = LutBuilder(patterns = ["4:(... .1. 111)->1"]) lut = lb.build_lut() Nc C st |d ur|| _ ng | _ d | _|d ur8ddgdgddgdgddgg d�d�}||vr1td | d ��|| | _ d S d S ) N�1:(... ... ...)->0z4:(00. 01. ...)->1z4:(... .0. .1.)->1z4:(... .0. ..1)->1z4:(... .1. .0.)->0z4:(... .1. ..0)->0)r z4:(.0. .1. ...)->1z4:(01. .1. ...)->1)�corner� dilation4� dilation8�erosion4�erosion8�edgezUnknown pattern �!)�patterns�lut� Exception)�selfr �op_name�known_patterns� r �0/usr/lib/python3/dist-packages/PIL/ImageMorph.py�__init__@ s � �zLutBuilder.__init__c C s | j |7 _ d S �N�r )r r r r r � add_patternsX s zLutBuilder.add_patternsc s. ddg�d� t � �fdd�tt�D ��| _d S )Nr r � c 3 s � | ] }�|� @ d k V qdS )r Nr )�.0�i��m�symbolsr r � <genexpr>^ s � z/LutBuilder.build_default_lut.<locals>.<genexpr>)� bytearray�range�LUT_SIZEr �r r r% r �build_default_lut[ s "z LutBuilder.build_default_lutc C s | j S r �r r, r r r �get_lut` s zLutBuilder.get_lutc s( t |�dksJ �d�� fdd�|D ��S )z�string_permute takes a pattern and a permutation and returns the string permuted according to the permutation list. � � c 3 s � | ]}� | V qd S r r )r# �p��patternr r r( h s � z-LutBuilder._string_permute.<locals>.<genexpr>)�len�join)r r4 � permutationr r3 r �_string_permutec s zLutBuilder._string_permutec C s� ||fg}d|v r%|d d }t d�D ]}|�| �|d d t�|f� qd|v rCt|�}|d|� D ]\}}|�| �|t�|f� q3d|v rqt|�}|d|� D ] \}}|�dd ��d d��d d �}dt|� }|�||f� qQ|S ) z�pattern_permute takes a basic pattern and its result and clones the pattern according to the modifications described in the $options parameter. It returns a list of all cloned patterns.�4���r r r �M�N�0�Z�1)r* �appendr8 �ROTATION_MATRIXr5 � MIRROR_MATRIX�replace�int) r � basic_pattern�options� basic_resultr �resr$ �nr4 r r r �_pattern_permutej s$ � zLutBuilder._pattern_permutec C s8 | � � g }| jD ]:}t�d|�dd��}|s td| d ��|�d�}|�d�}t|�d��}|�d d��dd�}|| �|||�7 }q t |�D ] \}}|d �d d ��d d �}t� |�}||d f||< qHt t �D ].}t |�dd� }ddt|� | ddd� }|D ]\}} |�|�r�d dg| | j|< q�qj| jS )zlCompile all patterns into a morphology lut. TBD :Build based on (file) morphlut:modify_lut z (\w*):?\s*\((.+?)\)\s*->\s*(\d)� r1 zSyntax error in pattern "�"r r r � r �.�Xz[01]Nr= r0 r: )r- r �re�searchrC r �grouprD rJ � enumerate�compiler* r+ �binr5 �matchr ) r r r2 r& rF r4 �resultr$ � bitpattern�rr r r � build_lut� s0 ��zLutBuilder.build_lut)NN) �__name__� __module__� __qualname__�__doc__r r! r- r/ r8 rJ rZ r r r r r s # r c @ r )�MorphOpz*A class for binary morphological operatorsNc C sB || _ |durt|d��� | _ dS |dur t|d��� | _ dS dS )z&Create a binary morphological operatorN)r r )r r rZ )r r r r r r r r � s �zMorphOp.__init__c C sZ | j du r td��|jdkrtd��t�|j|jd�}t�t | j �|j j |j j �}||fS )z�Run a single morphological operation on an image Returns a tuple of the number of changed pixels and the morphed imageN�No operator loaded�L�Image mode must be L) r r �mode� ValueErrorr �new�sizer �apply�bytes�im�id)r �image�outimage�countr r r rg � s z MorphOp.applyc C s: | j du r td��|jdkrtd��t�t| j �|jj�S )z�Get a list of coordinates matching the morphological operation on an image. Returns a list of tuples of (x,y) coordinates of all matching pixels. See :ref:`coordinate-system`.Nr` ra rb ) r r rc rd r rV rh ri rj �r rk r r r rV � s z MorphOp.matchc C s |j dkr td��t�|jj�S )z�Get a list of all turned on pixels in a binary image Returns a list of tuples of (x,y) coordinates of all matching pixels. See :ref:`coordinate-system`.ra rb )rc rd r � get_on_pixelsri rj rn r r r ro � s zMorphOp.get_on_pixelsc C sX t |d��}t|�� �| _W d � n1 sw Y t| j�tkr*d| _td��dS )z!Load an operator from an mrl file�rbNzWrong size operator file!)�openr) �readr r5 r+ r �r �filename�fr r r �load_lut� s ��zMorphOp.load_lutc C sN | j du r td��t|d��}|�| j � W d � dS 1 s w Y dS )z Save an operator to an mrl fileNr` �wb)r r rq �writers r r r �save_lut� s "�zMorphOp.save_lutc C s || _ dS )z#Set the lut from an external sourceNr. )r r r r r �set_lut� s zMorphOp.set_lut)NNN) r[ r\ r] r^ r rg rV ro rv ry rz r r r r r_ � s r_ ) rP r1 r r r+ rA rB r r_ r r r r �<module> s