From c4552e04e1271a9210a934233beae5be1943d034 Mon Sep 17 00:00:00 2001
From: Théo de la Hogue
Date: Wed, 7 Jun 2023 14:34:14 +0200
Subject: Writing User guide and use cases section.

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 .../user_guide/areas_of_interest/aoi_projection.md | 22 ++++++++++++++++++++++
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 create mode 100644 docs/user_guide/areas_of_interest/aoi_projection.md

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diff --git a/docs/user_guide/areas_of_interest/aoi_projection.md b/docs/user_guide/areas_of_interest/aoi_projection.md
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+---
+title: AOI projection
+---
+
+AOI projection
+==============
+
+An AOI3D scene can be rotated and translated according to a pose estimation before to project it onto camera frame as an AOI2D scene.
+
+![AOI projection](../../img/aoi_projection.png)
+
+``` python
+...
+
+# Assuming pose estimation is done (tvec and rmat)
+
+# Project AOI 3D scene according pose estimation and camera intrinsic parameters
+aoi2D_scene = aoi3D_scene.project(tvec, rmat, aruco_camera.K)
+
+# Draw AOI 2D scene
+aoi2D_scene.draw(frame)
+```
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