code: def roi_pooling(input, rois, pool_height, pool_width):
      
      # TODO(maciek): ops scope
      out = roi_pooling_module.roi_pooling(input, rois, pool_height=pool_height, pool_width=pool_width)
      output, argmax_output = out[0], out[1]
      return output
docs: returns a tensorflow operation for computing the Region of Interest Pooling
      
        @arg input: feature maps on which to perform the pooling operation
        @arg rois: list of regions of interest in the format (feature map index, upper left, bottom right)
        @arg pool_width: size of the pooling sections