U
    ?h&                  	   @   s  d dl Zd dlZd dlmZmZ d dlmZ d dlm	Z	 d dl
mZ d dlmZ ejd e ZdZeeeejjej   d d	ZeejZejd
 dd Zdd Zejdddddddgejdejejejgdd Z ejdej!ej"ejejejgdd Z#ejdd dddgdd Z$ejdej!ejejgdd Z%d d! Z&d"d# Z'ejdej!ej"ejejejgd$d% Z(d&d' Z)ejdejejejgd(d) Z*ejdejejejgd*d+ Z+d,d- Z,dS ).    N)assert_equalassert_almost_equal)data)expected_warnings)_supported_float_typestructural_similarity   g      4@   i  c                  C   sf   d} t j| | d t j}t j| | d t j}t||| ddk sNttt||| dd d S )N3   r
   win_size皙?   )nprandomrandastypeuint8r   AssertionErrorr   )NXY r   b/var/www/html/venv/lib/python3.8/site-packages/skimage/metrics/tests/test_structural_similarity.py&test_structural_similarity_patch_range   s
    r   c            	      C   s   d} t j| | d t j}t j| | d t j}t||dd}t|d t||dd}|dk sjtt||ddd	}|dk stt||dd
\}}t|j|j t||}t|| tt||d d S )Nd   r
      r   r   g333333?   T)r   gaussian_weights)full      ?)	r   r   r   r   r   r   r   r   shape)	r   r   r   ZS0S1S2Zmssim0S3mssimr   r   r    test_structural_similarity_image   s    


r'   seedr      r         dtypec                 C   s   d}t j| }|||fj|ddd }|||fj|ddd }t||dd}t||ddd}|dk srt|d	 dk stt |d
 dk stt||dddd\}}	}
|
jt|kst|	jt|kstt |	dk std S )N<   Fcopyr
   
data_rangeT)r1   gradient皙?r   r   )r1   r2   r    )	r   r   Zdefault_rngr   r   r   allr,   r   )r(   r,   r   rngr   r   fgr&   gradsr   r   r   test_structural_similarity_grad5   s&        r:   c                 C   s   d}t j||}t j||}t | jdkrVd}|d t j}|d t j}n d}|j| dd}|j| dd}t|||d}|jt jkst	|d	k st	d S )
N   Ziub     o@r
   r!   Fr.   r0   r   )
r   r   r   r,   kindr   r   r   float64r   )r,   r   r   r   r1   r#   r   r   r    test_structural_similarity_dtypeR   s    r?   channel_axisc              	      sH  d}t j||d t j}t j||d t j}t||dd}t |dt jf d}t |dt jf d} fdd||fD \}}t|| dd	}t|| t|| d
d\}}	t	|	j
|j
 t|| d
d\}}
t	|
j
|j
 t|| d
d
d\}}
}	t	|
j
|j
 t	|	j
|j
 tt t||dd d W 5 Q R X d S )Nr   r
   r   r   .)r   r   r   c                 3   s   | ]}t |d  V  qdS )rA   N)r   Zmoveaxis).0Z_arrr@   r   r   	<genexpr>u   s     z:test_structural_similarity_multichannel.<locals>.<genexpr>)r@   r   T)r@   r    )r@   r2   )r@   r    r2      )r   r@   )r   r   r   r   r   r   ZtileZnewaxisr   r   r"   pytestraises
ValueError)r@   r   r   r   r#   XcYcr$   mr%   r8   r   rC   r   'test_structural_similarity_multichannelh   s0    

rL   c                 C   sz   d}t ddD ]f}|gd }tjj| d | }tjj| d | }t||ddd}|jtjksht|dk stqd S )	N
   r   r	   r
   r   r<   r   r1   r3   )	ranger   r   r   r   r   r,   r>   r   )r,   r   ndimZxsizer   r   r&   r   r   r   test_structural_similarity_nD   s    
rQ   c                     s   t   d} t | tjj j   dd jt	 dd} fddt
 jd D }t|t| tt	  ddd d S )	Ng      .@r   r
   rA   rC   c                    s&   g | ]}t d |f  d |f qS ).r   )rB   crI   rJ   r   r   
<listcomp>   s
   
 
zCtest_structural_similarity_multichannel_chelsea.<locals>.<listcomp>r!   )r   Zchelsear   clipr   randnr"   r   r,   r   rO   r   Zmeanr   )sigmar&   Z	mssim_sepr   rS   r   /test_structural_similarity_multichannel_chelsea   s     rX   c                  C   sF   d} t jtjksttjtjks$ttt tddd}t|| dd dS )aB   Tests vs. imdiff result from the following IPOL article and code:
    https://www.ipol.im/pub/art/2011/g_lmii/.

    Notes
    -----
    To generate mssim_IPOL, we need a local copy of cam_noisy:

    >>> from skimage import io
    >>> io.imsave('/tmp/cam_noisy.png', cam_noisy)

    Then, we use the following command:
    $ ./imdiff -m mssim <path to camera.png>/camera.png /tmp/cam_noisy.png

    Values for current data.camera() calculated by Gregory Lee on Sep, 2020.
    Available at:
    https://github.com/scikit-image/scikit-image/pull/4913#issuecomment-700653165
    g  @?TF)r   Zuse_sample_covariancer   )decimalN)camr,   r   r   r   	cam_noisyr   r   )Z
mssim_IPOLr&   r   r   r   +test_gaussian_structural_similarity_vs_IPOL   s    r\   c                 C   sL   d}t jtjksttjtjks$ttt | t| dd}t|| d S )Ng;V,T?r
   r0   )	rZ   r,   r   r   r   r[   r   r   r   )r,   Zmssim_skimage_0pt17r&   r   r   r   test_mssim_vs_legacy   s    
 r]   c               	   C   s   t tt} tdg, t ttjttj}|dks<tW 5 Q R X tddg t tttj}W 5 Q R X t tttj	dd}t
| | d S )Nz%Setting data_range based on im1.dtypegGz?zInputs have mismatched dtypesr
   r0   )r   rZ   r[   r   r   r   Zuint16r   int32float32r   )r&   Zmssim_uint16Zmssim_mixedr   r   r    test_ssim_warns_about_data_range   s     

 
 r`   c              	   C   s^   t jd| d}tt||dddd tt||dddd tt t|| W 5 Q R X d S )N)r	   r	   r,   r   r!   rN   r	   )r   zerosr   r   rF   rG   rH   r,   r   r   r   r   &test_structural_similarity_small_image   s
    rd   c              	   C   s2   t jd| d}tt t|| W 5 Q R X d S )N)@   re   ra   )r   rb   rF   rG   rH   r   rc   r   r   r   =test_structural_similarity_errors_on_float_without_data_range   s    rf   c               	   C   s   t jdt jd} t jdt jd}tt t| | W 5 Q R X tt t| | | jd d d W 5 Q R X tt t| | dd W 5 Q R X tt t| | dd	 W 5 Q R X tt t| | d
d W 5 Q R X d S )N)	   rg   ra   )r*   r*   r   r   r   g)ZK1)ZK2g      )rW   )r   rb   r>   rF   rG   rH   r   r"   )r   r   r   r   r   test_invalid_input   s    "rh   )-numpyr   rF   Znumpy.testingr   r   Zskimager   Zskimage._shared._warningsr   Zskimage._shared.utilsr   Zskimage.metricsr   r   r(   camerarZ   rW   rU   rV   r"   r[   r   r,   r   r'   markZparametrizeZfloat16r_   r>   r:   r   r^   r?   rL   rQ   rX   r\   r]   r`   rd   rf   rh   r   r   r   r   <module>   sN    	 

'
 



