Sky Tracker SDK
C++ tracking core for fast-moving small objects — drone, aircraft, bird detection and tracking. No GPU required.
Install
pip install sky-tracker-sdk
License
A valid license key is required at runtime. Buy one, or try the tracker first in the free demo app, at sky-tracker.deneb-systems.com. Set the key as an environment variable:
# Windows
set SKY_TRACKER_LICENSE_KEY=SKT1.<your-token>
# Linux / macOS
export SKY_TRACKER_LICENSE_KEY=SKT1.<your-token>
Or drop a sky_tracker.lic file next to your script — the SDK finds it automatically.
Quick Start
import cv2
import sky_tracker
cap = cv2.VideoCapture("video.mp4")
ok, frame = cap.read()
tracker = sky_tracker.Tracker("default")
tracker.lock(frame, (469, 409, 26, 38)) # x, y, w, h
while cap.isOpened():
ok, frame = cap.read()
if not ok:
break
result = tracker.update(frame)
if not result.lost:
cx, cy = result.center()
print(f"frame target at ({cx:.1f}, {cy:.1f}) confidence={result.confidence:.2f}")
Tracker Profiles
| Profile | Best for |
|---|---|
default |
Recommended speed/quality balance; grayscale, constrained-CPU policy |
correlation |
An improved correlation-filter tracker, no neural network; one target. --ml adds NanoTrack, arbitrated |
legacy-adaptive |
Template tracker with correlation assist (strict checks, camera-motion compensation) and scheduled foreground box fitting |
correlation with ml needs NanoTrack, which the Linux (x86_64 and aarch64)
and macOS wheels include; sky_tracker.has_nanotrack says whether yours does.
Without it, Tracker("correlation", ml=True) raises and plain correlation
still works. On a Raspberry Pi or Jetson, NanoTrack is the slow part: measure
ml there, raise ml_every to run it less often, or leave it off.
Accuracy and speed per profile are in
benchmarks.
Platforms
| Platform | Status |
|---|---|
| Windows x64 | Wheel build configured |
| Linux x86_64 | Wheel build configured |
| Raspberry Pi 4/5 ARM64 | Wheel build configured; hardware validation required |
| macOS arm64 | Wheel build configured; 1.1.0 built, tested and benchmarked on Apple M3 Pro |
Links
Native SDK and platform builds
The C++ SDK accepts borrowed Gray8, Bgr8, or Rgb8 frames through an OpenCV-free public header and exports an installed CMake target. The Android binding accepts camera Y-plane buffers, and the Jetson build script prepares CPU binaries for JetPack 4. Android and Jetson need validation on their target devices before release.
1 maintainer
Metadata
1 maintainer
Release files for sky-tracker-sdk 1.1.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Built distributions (wheels)
Total release size: 194.8 MB
Release files / sky_tracker_sdk-1.1.0-cp313-cp313-win_amd64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp313-cp313-win_amd64.whl |
|---|---|
| Size | 10.9 MB |
| Tags | CPython 3.13 Windows x86-64 |
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No |
| Uploaded via |
twine/7.0.0 CPython/3.12.16
|
Release files / sky_tracker_sdk-1.1.0-cp313-cp313-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp313-cp313-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl |
|---|---|
| Size | 7.9 MB |
| Tags | CPython 3.13 Linux glibc 2.27+ x86-64 Linux glibc 2.28+ x86-64 |
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No |
| Uploaded via |
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Release files / sky_tracker_sdk-1.1.0-cp313-cp313-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp313-cp313-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl |
|---|---|
| Size | 6.3 MB |
| Tags | CPython 3.13 Linux glibc 2.27+ ARM64 Linux glibc 2.28+ ARM64 |
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No |
| Uploaded via |
twine/7.0.0 CPython/3.12.16
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Release files / sky_tracker_sdk-1.1.0-cp313-cp313-macosx_15_0_arm64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp313-cp313-macosx_15_0_arm64.whl |
|---|---|
| Size | 23.6 MB |
| Tags | CPython 3.13 macOS 15.0+ ARM64 |
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No |
| Uploaded via |
twine/7.0.0 CPython/3.12.16
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Release files / sky_tracker_sdk-1.1.0-cp312-cp312-win_amd64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp312-cp312-win_amd64.whl |
|---|---|
| Size | 10.9 MB |
| Tags | CPython 3.12 Windows x86-64 |
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Release files / sky_tracker_sdk-1.1.0-cp312-cp312-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp312-cp312-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl |
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| Size | 7.9 MB |
| Tags | CPython 3.12 Linux glibc 2.27+ x86-64 Linux glibc 2.28+ x86-64 |
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Release files / sky_tracker_sdk-1.1.0-cp312-cp312-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp312-cp312-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl |
|---|---|
| Size | 6.3 MB |
| Tags | CPython 3.12 Linux glibc 2.27+ ARM64 Linux glibc 2.28+ ARM64 |
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Release files / sky_tracker_sdk-1.1.0-cp312-cp312-macosx_15_0_arm64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp312-cp312-macosx_15_0_arm64.whl |
|---|---|
| Size | 23.6 MB |
| Tags | CPython 3.12 macOS 15.0+ ARM64 |
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Release files / sky_tracker_sdk-1.1.0-cp311-cp311-win_amd64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp311-cp311-win_amd64.whl |
|---|---|
| Size | 10.9 MB |
| Tags | CPython 3.11 Windows x86-64 |
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Release files / sky_tracker_sdk-1.1.0-cp311-cp311-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp311-cp311-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl |
|---|---|
| Size | 7.9 MB |
| Tags | CPython 3.11 Linux glibc 2.27+ x86-64 Linux glibc 2.28+ x86-64 |
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Release files / sky_tracker_sdk-1.1.0-cp311-cp311-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp311-cp311-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl |
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| Size | 6.3 MB |
| Tags | CPython 3.11 Linux glibc 2.27+ ARM64 Linux glibc 2.28+ ARM64 |
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Release files / sky_tracker_sdk-1.1.0-cp311-cp311-macosx_15_0_arm64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp311-cp311-macosx_15_0_arm64.whl |
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| Size | 23.6 MB |
| Tags | CPython 3.11 macOS 15.0+ ARM64 |
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Release files / sky_tracker_sdk-1.1.0-cp310-cp310-win_amd64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp310-cp310-win_amd64.whl |
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| Size | 10.9 MB |
| Tags | CPython 3.10 Windows x86-64 |
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Release files / sky_tracker_sdk-1.1.0-cp310-cp310-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp310-cp310-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl |
|---|---|
| Size | 7.9 MB |
| Tags | CPython 3.10 Linux glibc 2.27+ x86-64 Linux glibc 2.28+ x86-64 |
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Release files / sky_tracker_sdk-1.1.0-cp310-cp310-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp310-cp310-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl |
|---|---|
| Size | 6.3 MB |
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Release files / sky_tracker_sdk-1.1.0-cp310-cp310-macosx_15_0_arm64.whl
| Download URL | sky_tracker_sdk-1.1.0-cp310-cp310-macosx_15_0_arm64.whl |
|---|---|
| Size | 23.6 MB |
| Tags | CPython 3.10 macOS 15.0+ ARM64 |
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