InFlux

We present Intrinsics in Flux (InFlux), a real-world benchmark that provides per-frame ground truth intrinsics annotations for videos with dynamic intrinsics. Compared to prior benchmarks, InFlux captures a wider range of intrinsic variations and scene diversity, featuring 143K+ annotated frames from 386 high-resolution indoor and outdoor videos with dynamic camera intrinsics.

For more information about this dataset, please visit our website: https://influx.cs.princeton.edu/. Please find data download and submission instructions in the official repository.

Viewing .mp4 Files

The .mp4 files in this dataset require VLC media viewer to play locally. Please download VLC here.

Dataset Structure

The dataset includes 386 .mp4 videos and 2 .json files in the root directory:

• Dynamic Intrinsics Videos (.mp4)
  Videos with dynamic intrinsics, moving objects, and camera motion.

• Frame Counts and Split (video_frame_count_and_split.json)
  Maps each video to its number of frames and whether it belongs to the validation or test split.

• Validation Ground Truth (gt_validation_dict.json)
  Maps validation video frames to ground truth intrinsics values.

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JSON File Structures

video_frame_count_and_split.json

{
    "video_shot_1": {
        "frame_count": 1234,
        "split": "val"
    }
}

• frame_count – Number of frames in the video.

• split – Denotes which split the video belongs in. The value will either be "val" or "test".

gt_validation_dict.json

{
    "video_shot_1": {
        "0": {
            "intrinsics_gt": {
                "fx": ..., "fy": ..., "cx": ..., "cy": ...,
                "k1": ..., "k2": ..., "p1": ..., "p2": ...
            },
            "intrinsics_gt_extrapolated": { ... },
            "lens_metadata": {
                "focal_length_mm": ...,
                "focus_distance_m": ...
            }
        },
        "1": { ... },
        ...
    }
}

Per-frame keys:

• intrinsics_gt – Ground truth intrinsics from look-up table (LUT) interpolation.

  • fx, fy, cx, cy, k1, k2, p1, p2 denote the intrinsics parameters as specified by the rad-tan Brown-Conrady distortion model.

• intrinsics_gt_extrapolated – The same as intrinsics_gt, but also provides extrapolated intrinsics if lens metadata is outside of LUT bounds. It contains the same fields as intrinsics_gt.

• lens_metadata – Raw physical lens parameters focal_length_mm, focus_distance_m