Multiprocessing not available, fall back to single threaded encoding imread read blank (None) image for file: /home/opencv/–center-crop/Downloads/img/h_101.jpg

Data_Miner · February 27, 2019, 2:25pm

When i try create .rec files using im2rec.py

apache/incubator-mxnet/blob/master/tools/im2rec.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

from __future__ import print_function

This file has been truncated. show original

i get these errors,what does it mean and how to fix
machine:~$ python Downloads/im2rec.py Downloads/train –center-crop --resize 224 --pack-label
Creating .rec file from /home/opencv/Downloads/train/dog.lst in /home/opencv/Downloads/train
multiprocessing not available, fall back to single threaded encoding
imread read blank (None) image for file: /home/opencv/–center-crop/Downloads/img/h_101.jpg
Traceback (most recent call last):
File “Downloads/im2rec.py”, line 386, in
record.write_idx(item[0], s)
File “/home/opencv/.local/lib/python2.7/site-packages/mxnet/recordio.py”, line 285, in write_idx
self.write(buf)
File “/home/opencv/.local/lib/python2.7/site-packages/mxnet/recordio.py”, line 135, in write
ctypes.c_size_t(len(buf))))
TypeError: object of type ‘NoneType’ has no len()

thomelane · February 27, 2019, 7:22pm

Hi @Data_Miner, I spot a typo! Check just before center-crop.

You’ve got –center-crop when it needs to be --center-crop, so the script is looking for a file at /home/opencv/–center-crop/Downloads/img/h_101.jpg which doesn’t exist.

Data_Miner · February 28, 2019, 2:18pm

Thank you, it is works:)

Topic		Replies	Views
Im2rec.py: error: unrecognized arguments TRUE	1	1261	February 25, 2019
TypeError: object of type 'NoneType' has no len()	2	1046	May 7, 2019
Read images with rec format	1	490	November 9, 2018
Documentation for Im2Rec.py? Discussion	3	1360	October 28, 2018
About the data translating tool im2rec, is there any option to add new images to the existing rec file?	1	478	June 29, 2018

Multiprocessing not available, fall back to single threaded encoding imread read blank (None) image for file: /home/opencv/–center-crop/Downloads/img/h_101.jpg

Related Topics