> For the complete documentation index, see [llms.txt](https://posetracker.gitbook.io/posetracker-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://posetracker.gitbook.io/posetracker-api/pixel-tracking-deprecated/how-does-it-work.md).

# How does it work ?

<mark style="color:$danger;">**As of January 28, 2026, the Pixel Tracking feature is deprecated and is no longer actively maintained.**</mark>\ <mark style="color:$danger;">**It will remain available for teams who still rely on it, but we won’t ship further improvements or provide ongoing maintenance for it.**</mark>

<mark style="color:$danger;">**If you need a custom version (or an alternative approach), we can build and support a tailored solution, happy to discuss your needs on a quick call:**</mark> [<mark style="color:$danger;">**https://calendly.com/fabrice-sepret/shaping-the-future-of-posetracker**</mark>](https://calendly.com/fabrice-sepret/shaping-the-future-of-posetracker)

We provide a pixel that receives images to detect human body key points and analyze motion within those images (such as counting squats, giving recommendations during pushups, tracking lunges progression, etc.).

<figure><img src="/files/761v1qi6Kxfeda36TY3o" alt=""><figcaption></figcaption></figure>

**Everything stay client side :**&#x20;

* ❌ no streaming&#x20;
* ❌ no latency
* &#x20;❌ privacy problems

**Pose estimation**&#x20;

We track 17 keypoints of the human body on a 2D plane:

<figure><img src="/files/oG4TkQ8BXAJyBIplNzJp" alt=""><figcaption><p>PoseTracker keypoints</p></figcaption></figure>

\
**You can try it here**: <https://codepen.io/Fabrice-Sepret/pen/OJeBpMm>