readinsp 0.1.0

Read Insta360 .insp still images into NumPy arrays

readinsp

readinsp reads Insta360 .insp still-image files into NumPy arrays.

Usage

from readinsp import read_insp, read_metadata, read_preview

image = read_insp("example.insp")
print(image.shape, image.dtype)  # (3040, 6080, 3) uint8

preview = read_preview("example.insp")
print(preview.shape)  # (960, 1920, 3)

metadata = read_metadata("example.insp")
print(metadata.width, metadata.height, metadata.preview_size)
print(metadata.exif.get("Model"))
print(metadata.trailer.fields.get("camera_model"))

Rectilinear views

read_rectilinear undistorts the two circular fisheye images, combines the two lenses, and renders a regular perspective view:

from readinsp import read_rectilinear

view = read_rectilinear(
    "example.insp",
    spherical_angle=(0, 0),  # yaw, pitch in degrees
    hfov=90,
    vfov=60,
    width=1200,
)
print(view.shape)  # (693, 1200, 3)

Angle convention: yaw 0 points at the left fisheye lens, yaw 180 points at the right fisheye lens, and positive pitch looks up. spherical_angle may also include a third roll value: (yaw, pitch, roll). When height is omitted, it is computed from the FOVs so the output has approximately square angular sampling near the view center. The default dual-fisheye model assumes a 190 degree fisheye per lens with an 8 degree blend near the stitch boundary. Both values can be overridden.

Gravity leveling is available for files with a valid EXIF MakerNote gravity vector:

from readinsp import SphericalAngle, read_rectilinear

floor = read_rectilinear(
    "example.insp",
    spherical_angle=SphericalAngle(yaw=0, pitch=-90, gravity_level=True),
    hfov=90,
    vfov=70,
    width=1000,
)

With gravity_level=True, positive pitch looks opposite gravity and negative pitch looks along gravity. Yaw is still camera-relative because the inspected files do not include a usable magnetic-north heading.

Install for local development from the repository root with:

python -m pip install -e readinsp

Limitations

This is a reverse-engineered parser based on samples from the OneR and OneRS cameras and might not work for other camera models. Rectilinear rendering is an approximate open implementation and will not match Insta360 Studio's proprietary stitching exactly, especially near the lens seam.