readme: import numpy as np
  
  def sepia(image):
      sepia_filter = np.array(
          [[0.393, 0.769, 0.189], 
           [0.349, 0.686, 0.168], 
           [0.272, 0.534, 0.131]]
      )
      sepia_img = image.dot(sepia_filter.T)
      sepia_img /= sepia_img.max()
      return sepia_img
      
      import gradio as gr