old_contents: from .lpi_filter import inverse, wiener, LPIFilter2D
  from .ctmf import median_filter
  from ._gaussian import gaussian_filter
  from ._canny import canny
  from .edges import (sobel, hsobel, vsobel, scharr, hscharr, vscharr, prewitt,
                      hprewitt, vprewitt, roberts, roberts_positive_diagonal,
                      roberts_negative_diagonal)
  from ._denoise import denoise_tv_chambolle
  from ._denoise_cy import denoise_bilateral, denoise_tv_bregman
  from ._rank_order import rank_order
  from ._gabor import gabor_kernel, gabor_filter
  from .thresholding import threshold_otsu, threshold_adaptive
  from . import rank
  
  
  __all__ = ['inverse',
             'wiener',
             'LPIFilter2D',
             'median_filter',
             'gaussian_filter',
             'canny',
             'sobel',
             'hsobel',
             'vsobel',
             'scharr',
             'hscharr',
             'vscharr',
             'prewitt',
             'hprewitt',
             'vprewitt',
             'roberts',
             'roberts_positive_diagonal',
             'roberts_negative_diagonal',
             'denoise_tv_chambolle',
             'denoise_bilateral',
             'denoise_tv_bregman',
             'rank_order',
             'gabor_kernel',
             'gabor_filter',
             'threshold_otsu',
             'threshold_adaptive',
             'rank']
  
new_contents: from .lpi_filter import inverse, wiener, LPIFilter2D
  from .ctmf import median_filter
  from ._gaussian import gaussian_filter
  from ._canny import canny
  from .edges import (sobel, hsobel, vsobel, scharr, hscharr, vscharr, prewitt,
                      hprewitt, vprewitt, roberts, roberts_positive_diagonal,
                      roberts_negative_diagonal)
  from ._denoise import denoise_tv_chambolle
  from ._denoise_cy import denoise_bilateral, denoise_tv_bregman
  from ._rank_order import rank_order
  from ._gabor import gabor_kernel, gabor_filter
  from .thresholding import threshold_adaptive, threshold_otsu, threshold_yen
  from . import rank
  
  
  __all__ = ['inverse',
             'wiener',
             'LPIFilter2D',
             'median_filter',
             'gaussian_filter',
             'canny',
             'sobel',
             'hsobel',
             'vsobel',
             'scharr',
             'hscharr',
             'vscharr',
             'prewitt',
             'hprewitt',
             'vprewitt',
             'roberts',
             'roberts_positive_diagonal',
             'roberts_negative_diagonal',
             'denoise_tv_chambolle',
             'denoise_bilateral',
             'denoise_tv_bregman',
             'rank_order',
             'gabor_kernel',
             'gabor_filter',
             'threshold_adaptive',
             'threshold_otsu',
             'threshold_yen',
             'rank']
  
subject: fix threshold_yen import