3D IQ Test Task (3D-IQTT) - A Dataset for Quantitative Evaluation of 3D Reconstruction from 2D Images

3D reconstruction is mostly evaluated qualitatively. With this dataset, we are introducing a new difficult quantitative task, the 3D IQ test task (3D-IQTT).

It is designed to be similar to mental rotation questions found in some IQ tests. Each element in the dataset consists of 4 images: reference object and answers 1-3. One of the answers is the reference object but randomly rotated. For every question, dataset users have to use their model to pick the rotated model out of the 3 possible answers.

The dataset encourages semi-supervised or unsupervised 3D reconstruction because it contains a large corpus of unlabeled data and only a small set of labeled data where the correct answer is known.

All the images are of blocky 3D shapes floating in space in front of a black background.

Demo scripts for loading/processing the dataset can be found at https://github.com/fgolemo/3D-IQTT

The dataset consists of:

• 3diqtt-v2-train.h5 (XZ-compressed)

  (Training Dataset)

  • /labeled

    • /questions

      format: [10,000 x 4 x 128 x 128 x 3], corresponding to (10k items) x (reference + 3 answers) x (img width) x (img height) x (RGB), np.float32 in range [0,1]

    • /answers

      format: [10,000], corresponding to (10k answers), np.uint8, one of the following three items: [0,1,2]

  • /unlabeled

    • /questions

      format: [100,000 x 4 x 128 x 128 x 3], corresponding to (100k items) x (reference + 3 answers) x (img width) x (img height) x (RGB), np.float32 in range [0,1]

• 3diqtt-v2-test.h5

  (Test Dataset)

  • /questions

    format: [10,000 x 4 x 128 x 128 x 3], corresponding to (10k items) x (reference + 3 answers) x (img width) x (img height) x (RGB), np.float32 in range [0,1].
    Important! This is what you have to evaluate yourself on. We have the correct answers but they are not public.

• 3diqtt-v2-val.h5

  (Validation Dataset)

  • /questions

    format: [10,000 x 4 x 128 x 128 x 3], corresponding to (10k items) x (reference + 3 answers) x (img width) x (img height) x (RGB), np.float32 in range [0,1]

  • /answers

    format [10,000], corresponding to (10k answers), np.uint8, one of the following three items: [0,1,2]

Important: Before use, the main training dataset (3diqtt-v2-train.h5.xz) needs to be decompressed. This can take up to 24h depending on your hardware. We apologize for any inconvenience caused by this. The uncompressed file has a size of ~74GB. The reason for this compression was a restriction on the size of individual files. The command for decompression is "unxz 3diqtt-v2-train.h5.xz" on Unix machines.

If you use this dataset, please cite it.