【MindSpore】【图片加载】加载RGB-D图片失败

问题描述：

在复现GitHub - skumra/robotic-grasping: Antipodal Robotic Grasping using GR-ConvNet. IROS 2020.时，使用MindSpore加载数据出现异常，提示Dataset错误。很不明白MindSpore中Dataset的原理

[ERROR] MD(9471,7f0664347700,python):2021-12-28-01:08:07.456.946 [mindspore/ccsrc/minddata/dataset/core/data_type.cc:159] FromNpArray] Cannot convert from numpy type. Unknown data type is returned![ERROR] MD(9471,7f0664347700,python):2021-12-28-01:08:07.456.992 [mindspore/ccsrc/minddata/dataset/core/data_type.cc:159] FromNpArray] Cannot convert from numpy type. Unknown data type is returned![ERROR] MD(9471,7f0664347700,python):2021-12-28-01:08:07.717.762 [mindspore/ccsrc/minddata/dataset/util/task.cc:67] operator()] Task: GeneratorOp(ID:1) - thread(139665427691264) is terminated with err msg: Unexpected error. Invalid data type.

Line of code : 93

File         : /home/jenkins/agent-working-dir/workspace/Compile_GPU_X86_CentOS_Cuda11/mindspore/mindspore/ccsrc/minddata/dataset/core/tensor.cc

[ERROR] MD(9471,7f0664347700,python):2021-12-28-01:08:07.717.820 [mindspore/ccsrc/minddata/dataset/util/task_manager.cc:217] InterruptMaster] Task is terminated with err msg(more detail in info level log):Unexpected error. Invalid data type.

Line of code : 93

File         : /home/jenkins/agent-working-dir/workspace/Compile_GPU_X86_CentOS_Cuda11/mindspore/mindspore/ccsrc/minddata/dataset/core/tensor.cc

Traceback (most recent call last):

  File "/home/guoruiming/pycharm_project_232/GR-ConvNet/train.py", line 39, in 

    train(epoch, net, "GPU", train_data_iter, optimizer, 1000)

  File "/home/guoruiming/pycharm_project_232/GR-ConvNet/train.py", line 17, in train

    for data in train_data:

  File "/usr/local/python-3.7.5/lib/python3.7/site-packages/mindspore/dataset/engine/iterators.py", line 134, in __next__

    data = self._get_next()

  File "/usr/local/python-3.7.5/lib/python3.7/site-packages/mindspore/dataset/engine/iterators.py", line 208, in _get_next

    return [self._transform_tensor(t) for t in self._iterator.GetNextAsList()]

RuntimeError: Unexpected error. Invalid data type.

Line of code : 93

File         : /home/jenkins/agent-working-dir/workspace/Compile_GPU_X86_CentOS_Cuda11/mindspore/mindspore/ccsrc/minddata/dataset/core/tensor.cc





Process finished with exit code 1

解答：

上述问题应该已解决，对应pr为： dataset: detect return value type · Pull Request !25805 · MindSpore/mindspore - Gitee.com

• 主要原因应该是自定义Dataset的返回值，或者map接收的自定义函数的返回值，不是tuple of numpy array, 而是类似dict等
• 可以取从官网安装页面 取nightly版本验证下，看是否还有这个问题