Pascal VOC

Step 1. Download PascalVoc segmentation dataset

Step 2. Unpack archive

Step 3. Directory structure have to be the following:

.
├── ImageSets
│ └── Segmentation
│ ├── train.txt
│ ├── trainval.txt
│ └── val.txt
├── JPEGImages
│ ├── 2007_000032.jpg
│ ├── 2007_000033.jpg
│ ├── ...
├── SegmentationClass
│ ├── 2007_000032.png
│ ├── 2007_000033.png
│ ├── ...
└── SegmentationObject
├── 2007_000032.png
├── 2007_000033.png
├── ...

Step 4. Choose all (four) subdirectories and drag and drop them to browser.

If you will drag and drop parent directory instead of its contents, import will crash.