code: def select_image_layer(infiles, output_file, log, context):
      
  
      options = context.get_options()
      page_pdf = next(ii for ii in infiles if ii.endswith('.ocr.oriented.pdf'))
      image = next(ii for ii in infiles if ii.endswith('.image'))
  
      if options.lossless_reconstruction:
          log.debug(
              f"{page_number(page_pdf):4d}: page eligible for lossless reconstruction"
          )
          re_symlink(page_pdf, output_file, log)  # Still points to multipage
          return
  
      pageinfo = get_pageinfo(image, context)
  
      # We rasterize a square DPI version of each page because most image
      # processing tools don't support rectangular DPI. Use the square DPI as it
      # accurately describes the image. It would be possible to resample the image
      # at this stage back to non-square DPI to more closely resemble the input,
      # except that the hocr renderer does not understand non-square DPI. The
      # sandwich renderer would be fine.
      dpi = get_page_square_dpi(pageinfo, options)
      layout_fun = img2pdf.get_fixed_dpi_layout_fun((dpi, dpi))
  
      # This create a single page PDF
      with open(image, 'rb') as imfile, open(output_file, 'wb') as pdf:
          log.debug(f'{page_number(page_pdf):4d}: convert')
          img2pdf.convert(
              imfile, with_pdfrw=False, layout_fun=layout_fun, outputstream=pdf
          )
          log.debug(f'{page_number(page_pdf):4d}: convert done')
docs: Selects the image layer for the output page. If possible this is the
      orientation-corrected input page, or an image of the whole page converted
      to PDF.