def region_proposal_roidb(self):
    '\n        Return the database of regions of interest.\n        Ground-truth ROIs are also included.\n\n        This function loads/saves from/to a cache file to speed up future calls.\n        '
    cache_file = os.path.join(self.cache_path, (((self.name + '_') + cfg.REGION_PROPOSAL) + '_region_proposal_roidb.pkl'))
    if os.path.exists(cache_file):
        with open(cache_file, 'rb') as fid:
            roidb = cPickle.load(fid)
        print('{} roidb loaded from {}'.format(self.name, cache_file))
        return roidb
    if (self._image_set != 'test'):
        gt_roidb = self.gt_roidb()
        print('Loading region proposal network boxes...')
        model = cfg.REGION_PROPOSAL
        rpn_roidb = self._load_rpn_roidb(gt_roidb, model)
        print('Region proposal network boxes loaded')
        roidb = imdb.merge_roidbs(rpn_roidb, gt_roidb)
    else:
        print('Loading region proposal network boxes...')
        model = cfg.REGION_PROPOSAL
        roidb = self._load_rpn_roidb(None, model)
        print('Region proposal network boxes loaded')
    print('{} region proposals per image'.format((self._num_boxes_proposal / len(self.image_index))))
    with open(cache_file, 'wb') as fid:
        cPickle.dump(roidb, fid, cPickle.HIGHEST_PROTOCOL)
    print('wrote roidb to {}'.format(cache_file))
    return roidb
Return the database of regions of interest.
Ground-truth ROIs are also included.

This function loads/saves from/to a cache file to speed up future calls.
def region_proposal_roidb(self):
    '\n        Return the database of regions of interest.\n        Ground-truth ROIs are also included.\n\n        This function loads/saves from/to a cache file to speed up future calls.\n        '
    cache_file = os.path.join(self.cache_path, (((self.name + '_') + cfg.REGION_PROPOSAL) + '_region_proposal_roidb.pkl'))
    if os.path.exists(cache_file):
        with open(cache_file, 'rb') as fid:
            roidb = cPickle.load(fid)
        print('{} roidb loaded from {}'.format(self.name, cache_file))
        return roidb
    if (self._image_set != 'test'):
        gt_roidb = self.gt_roidb()
        print('Loading region proposal network boxes...')
        model = cfg.REGION_PROPOSAL
        rpn_roidb = self._load_rpn_roidb(gt_roidb, model)
        print('Region proposal network boxes loaded')
        roidb = imdb.merge_roidbs(rpn_roidb, gt_roidb)
    else:
        print('Loading region proposal network boxes...')
        model = cfg.REGION_PROPOSAL
        roidb = self._load_rpn_roidb(None, model)
        print('Region proposal network boxes loaded')
    print('{} region proposals per image'.format((self._num_boxes_proposal / len(self.image_index))))
    with open(cache_file, 'wb') as fid:
        cPickle.dump(roidb, fid, cPickle.HIGHEST_PROTOCOL)
    print('wrote roidb to {}'.format(cache_file))
    return roidb