About cityscapes datesets

[a610402863]

In the link about Cityscapes, I didn't find a data set called leftImg8bit_sequence_trainvaltest.zip. Is it a change of name or other reason?

[Yuliang-Zou]

Seems that they changed the way they organize the dataset. I cannot use the preprocessing code for CityScapes either.

After modifying the code a little bit, I now have 1638 images as training split, 191 images as val split. Not sure if the author used the same setting.

[tinghuiz]

What kind of error does it give you when you use the preprocessing code?

[Yuliang-Zou]

What I did to make the code works:

1. Remove the suffix "_sequence"
2. Swap the orders of "snippet_id" and "tgt_local_frame_id" and orders of "snippet_id" and "curr_local_frame_id" in is_valid_example() and load_image_sequence() in data/cityscapes/cityscapes_loader.py

Then I can get 1638 images as training split, 191 images as val split.

[tinghuiz]

You need to download the package called leftImg8bit_sequence_trainvaltest.zip(324GB) so it contains video snippets. After preprocessing I had ~69K training snippets and ~7K validation snippets.