neuromeka-stereo 0.1.2

Neuromeka stereo inference utilities (TensorRT)

neuromeka_stereo

TensorRT stereo inference utilities packaged for PyPI.

1. Install

1.1 Python package

pip install neuromeka_stereo

1.2 TensorRT runtime (plan execution)

python -m pip install --extra-index-url https://pypi.nvidia.com tensorrt-cu12==10.14.1.48.post1
python -m pip install "cuda-python<13"  # CUDA 12.x drivers

If your driver is CUDA 13.x, install the latest cuda-python instead.

1.3 Assets (manual placement required)

Until official download URLs are published, plan/onnx files must be placed manually. If a required plan file is missing or empty, StereoInference raises an error with the expected path and filename.

Place plan files here (preferred for this repo):

src/neuromeka_stereo/assets/

Or place them in the cache directory:

~/.cache/neuromeka_stereo

Expected filenames:

• foundation_stereo_480x640_RTX4060.plan
• foundation_stereo_480x640_RTX5060.plan
• foundation_stereo_480x640_RTX5090.plan

Default selection:

• If trt_path is omitted, NEUROMEKA_STEREO_DEFAULT_PLAN is used.
• If that is not set, the default is foundation_stereo_480x640_RTX4060.plan.

2. Usage

2.1 StereoInference API

Basic usage:

from neuromeka_stereo import StereoInference

fs = StereoInference(
    trt_path="foundation_stereo_480x640_RTX4060.plan",
    trt_width=640,
    trt_height=480,
    intrinsics=intrinsics,
    extrinsics=extrinsics,
    color_intrinsics=color_intrinsics,
    extrinsics_ir_to_color=extrinsics_ir_to_color,
    z_far=10.0
)

disp = fs.infer(left_ir, right_ir)
depth_m = fs.infer(left_ir, right_ir, return_depth=True)
depth_aligned = fs.align_depth_splat(depth_m, out_size=(color_height, color_width))

StereoInference(trt_path=None, trt_width=0, trt_height=0, intrinsics=None, extrinsics=None, color_intrinsics=None, extrinsics_ir_to_color=None, z_far=0.0)

• trt_path: Path to a .plan/.engine. If omitted or not found, it is treated as an asset name. The default asset is foundation_stereo_480x640_RTX4060.plan. If no local asset exists, a FileNotFoundError is raised.
• trt_width, trt_height: Optional input size override. Required for dynamic engines that do not expose a fixed input shape. If the engine has a fixed shape, that shape is used instead.
• intrinsics: Camera intrinsics for the left IR image. Must provide fx and the source resolution (width, height). The class scales fx to the inference resolution internally. RealSense intrinsics objects are supported.
• extrinsics: Stereo extrinsics between IR1 and IR2. Must provide a translation vector (meters). The baseline is the translation norm.
• color_intrinsics: Intrinsics for the RGB camera used in alignment.
• extrinsics_ir_to_color: Extrinsics from IR1 to RGB for alignment.
• z_far: Depth clip in meters. Set to 0 to disable clipping.

infer(left_ir, right_ir, return_depth=False)

• left_ir, right_ir: NumPy arrays with matching H x W. Supported shapes are (H, W), (H, W, 1), (H, W, 3). Grayscale inputs are replicated to 3 channels. Values are converted to float32 internally.
• If input size does not match the engine input, a ValueError is raised. Resize inputs to the engine shape before calling infer().
• Output is a disparity map (float32) in pixels with shape (H, W).
• If return_depth=True, intrinsics and extrinsics must be set. The returned depth is in meters and optionally clipped by z_far.

align_depth_splat(depth_ir, color_intrinsics=None, extrinsics_ir_to_color=None, ir_intrinsics=None, out_size=None, splat_size=2, z_far=None)

• Aligns a depth map (IR space) into the RGB frame using a splat projection.
• depth_ir: Depth map from infer(..., return_depth=True).
• color_intrinsics: Intrinsics for the RGB camera (optional if set on the instance).
• extrinsics_ir_to_color: Extrinsics from IR1 to RGB (optional if set on the instance).
• ir_intrinsics: Intrinsics for the IR camera. If omitted, uses self.intrinsics.
• out_size: (H, W) output size override for the aligned map.
• splat_size: Splat kernel size (default 2 for a 2x2 splat).
• z_far: Optional clip distance. Defaults to self.z_far if not provided.

Notes:

• Create one StereoInference instance and reuse it for streaming to avoid reloading the TensorRT engine each frame.
• Call ensure_loaded() to force engine loading and shape detection early.
• Plan files are GPU model and TensorRT major-version specific.
• Use set_calibration(intrinsics=..., extrinsics=...) if camera calibration values change after initialization.
• Use set_alignment(color_intrinsics=..., extrinsics_ir_to_color=...) if RGB alignment parameters change after initialization.
• Make sure intrinsics.width/height match the raw input resolution before any resizing; the class scales to the inference resolution.

2.2 RealSense demo (camera quickstart)

This example connects to a RealSense camera and runs inference on the IR stereo pair. It also compares the output with RealSense depth for visualization.

Install the dependency and run:

python -m pip install neuromeka_stereo[demo]
# or: python -m pip install opencv-python pyrealsense2
neuromeka-stereo-realsense \
  --trt_path foundation_stereo_480x640_RTX4060.plan \
  --width 640 --height 480 --fps 30 --z_far 10

If you are running from the repo:

python examples/run_realsense_demo.py \
  --trt_path foundation_stereo_480x640_RTX4060.plan \
  --width 640 --height 480 --fps 30 --z_far 10

Notes:

• Ensure the plan file exists in src/neuromeka_stereo/assets/ or ~/.cache/neuromeka_stereo before running.
• The plan input size is fixed; set --width/--height to match the plan.
• In the demo, intrinsics comes from the RealSense IR stream and is scaled internally to the inference resolution. extrinsics is IR1->IR2, and z_far comes from --z_far (default 10m).
• The display shows RGB, RS Depth, FS Depth (Raw), and FS Depth (Aligned).

3. Optional

Rebuild plan from ONNX

If you also have an ONNX file on the new machine, build a fresh plan. Place the ONNX file under src/neuromeka_stereo/assets/onnx/ or adjust the path below.

Install trtexec (Ubuntu 22.04, CUDA 12.9 repo):

sudo apt-get install -y --allow-downgrades \
  libnvinfer-bin=10.14.1.48-1+cuda12.9 \
  libnvinfer10=10.14.1.48-1+cuda12.9 \
  libnvinfer-plugin10=10.14.1.48-1+cuda12.9 \
  libnvonnxparsers10=10.14.1.48-1+cuda12.9 \
  libnvinfer-lean10=10.14.1.48-1+cuda12.9 \
  libnvinfer-vc-plugin10=10.14.1.48-1+cuda12.9 \
  libnvinfer-dispatch10=10.14.1.48-1+cuda12.9

/usr/src/tensorrt/bin/trtexec \
  --onnx=./src/neuromeka_stereo/assets/onnx/foundation_stereo_23-51-11_640x480.onnx \
  --saveEngine=./src/neuromeka_stereo/assets/foundation_stereo_480x640_RTX4060.plan \
  --fp16 \
  --shapes=left:1x3x480x640,right:1x3x480x640 \
  --skipInference

Local development setup (optional)

If you want to edit the package in-place or use the full dev stack:

python -m pip install -e .

cd /home/user/neuromeka-repo/nrmk_foundation_stereo
conda env create -f environment.yml
conda activate nrmk_fs

Appendix: Folder layout

./
  src/
    neuromeka_stereo/
      fs_infer.py
      assets/
        (empty by default; place plan/onnx here)
      FoundationStereo_TRT/
        core/
        depth_anything_pretrained_models/
        Utils.py
  examples/
    run_realsense_demo.py
  pyproject.toml
  environment.yml
  README.md

Appendix: Benchmark (D435 IR, 480x640)

Preliminary results; update for RTX 5060/5090 later.

GPU	Backend	Input	Latency (sec)	Notes
RTX 4060	TensorRT plan	480x640	~0.42	TRT plan execution
RTX 5060	TensorRT plan	480x640	~0.30	TRT plan execution
RTX 5090	TensorRT plan	480x640	~0.07	TRT plan execution
RTX 4060	Torch	480x640	~1.12	Torch inference