> For the complete documentation index, see [llms.txt](https://stage-precision.gitbook.io/grid/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://stage-precision.gitbook.io/grid/camera-calibration/before-you-start/choosing-the-right-calibration-tool/repositioning-tools.md). # Repositioning Tools Repositioning tools are different from full calibration tools. They usually do not solve the complete camera system again. Instead, they are used when existing calibration data is already available and only a specific part of the setup needs to be moved, aligned, or updated. Repositioning tools can be used to: * create an Alignment Profile from known image points * reposition an already calibrated camera system in 3D space * update the placement, orientation, or shape of existing Calibration Screens * add or adjust individual Calibration Screens in an already calibrated setup *** ## Focusing on Points Use **Focusing on Points** when a Lens Profile already exists and an Alignment Profile should be created from known image points. This workflow uses the live camera image and an existing Lens Profile to align the camera view based on selected points. #### Required Inputs * Live camera image input * Lens Profile #### Creates or Updates * Alignment Profile #### Typical Use Cases * Creating an Alignment Profile from known image points * Aligning a camera view when the lens behavior is already known * Workflows where the Lens Profile already exists and only the alignment needs to be solved #### Important Notes This tool requires an existing Lens Profile. It does not perform a full Lens Calibration. Use this workflow when the optical behavior of the lens is already known and the goal is to create or update the alignment based on selected image points. {% content-ref url="/pages/sK45d8S8zOMK0sU7qd5d" %} [Focusing on Points](/grid/camera-calibration/reposition-workflows/focusing-on-points.md) {% endcontent-ref %} *** ## Reposition from Marker **Reposition from Marker** repositions an existing calibrated camera setup using manually referenced Measurement Points. This tool uses **Measurement Point** objects as Manual Markers to reposition an existing calibrated setup or parent object. It does not create or update a Lens Profile or Alignment Profile. Instead, it applies the calculated offset to the selected parent object or Folder. #### Required Inputs * Camera Object * Parent folder * Live camera image input * Manual Markers / Measurement Points #### Creates or Updates * Parent folder / parent object transform This tool does not create or update: * Lens Profiles * Alignment Profiles * Calibration Screen placement #### Typical Use Cases * Moving an already calibrated camera system into a measured environment * Repositioning a calibrated camera system without changing its profiles * Aligning the complete system to known Manual Markers * Single-shot repositioning based on one camera observation #### Important Notes This tool assumes that the camera system is already calibrated. It does not solve the relationship between tracking data and the lens. That relationship is normally stored in an Alignment Profile and should already be valid before using this tool. The purpose of this tool is to move the complete calibrated camera system in 3D space without changing the underlying Lens Profile or Alignment Profile. This is useful when the camera calibration itself is correct, but the entire system needs to be positioned in a different coordinate space or aligned to a measured environment. {% content-ref url="/pages/3IEVe1e1nBLHk0T94rGj" %} [Reposition from Marker](/grid/camera-calibration/reposition-workflows/reposition-from-marker.md) {% endcontent-ref %} *** ## Reposition from Screen Use **Reposition from Screen** to move an already calibrated camera system in 3D space using Calibration Screens instead of Manual Markers. This workflow works like Reposition from Marker, but the reference is based on existing Calibration Screens. The tool does not create profiles and does not update the Calibration Screen placement. It applies offset values to a parent folder or parent object and keeps the existing calibration data unchanged. #### Required Inputs * Camera Object * Parent folder * Live camera image input * Calibration Screens #### Creates or Updates * Parent folder / parent object transform This tool does not create or update: * Lens Profiles * Alignment Profiles * Calibration Screen placement #### Typical Use Cases * Repositioning a calibrated camera system using known Calibration Screens * Moving the complete camera setup without changing Lens Profiles or Alignment Profiles * Aligning a camera system to an existing Calibration Screen setup * Single-shot repositioning based on Calibration Screen references #### Important Notes This tool assumes that the camera system is already calibrated and that the Calibration Screen setup is known. Use this workflow when the camera, lens, and tracking alignment are already correct, but the complete calibrated system needs to be moved or aligned in the 3D scene. {% content-ref url="/pages/3UChgXc8Df0xGNSTGoQc" %} [Reposition from Screen](/grid/camera-calibration/reposition-workflows/reposition-from-screen.md) {% endcontent-ref %} *** ## Screen Reposition Without Profile Use **Screen Reposition Without Profile** when Calibration Screens need to be positioned without using an existing Alignment Profile. This workflow requires a live camera image and existing Calibration Screens. It updates or applies the calculated screen placement, orientation, and shape to the Calibration Screens. The tool does not create the Calibration Screens themselves. The Calibration Screens must already be configured with their correct size and basic setup before using this workflow. #### Required Inputs * Live camera image input * Calibration Screens #### Creates or Updates * Calibration Screen placement * Calibration Screen orientation * Calibration Screen shape / geometry, depending on the screen setup #### Typical Use Cases * Positioning Calibration Screens without an existing Alignment Profile * Preparing accurate Calibration Screen placement before calibrating pan/tilt or rotation-only camera systems * Using an untracked camera to scan Calibration Screens from multiple perspectives * Updating Calibration Screen placement in a simple setup * Preparing Calibration Screen geometry before using it in another workflow #### Important Notes This tool is especially useful as a preparation step for camera systems with limited movement, such as pan/tilt cameras, rotation-only systems, small jibs, or other setups where the camera cannot easily observe the Calibration Screens from enough different perspectives. In these cases, you can use a separate camera without tracking to capture the Calibration Screens from multiple viewpoints. By walking around the setup and observing the Calibration Screens from different angles, the tool can calculate an accurate screen placement. During this process, the camera lens settings must remain fixed. Do not change zoom, focus, or other lens settings while capturing the screen observations. After the Calibration Screens have been positioned, this screen setup can be reused in the actual camera calibration workflow. For example, a pan/tilt camera or limited-movement camera can then be calibrated against the already positioned Calibration Screens, while the screen repositioning option in that calibration tool can be disabled. This approach is useful when the Calibration Screen setup should be solved accurately once and then reused by one or more camera systems. {% content-ref url="/pages/UQmIWZKH1K6sGMeTa2YU" %} [Screen Reposition Without Profile](/grid/camera-calibration/reposition-workflows/screen-reposition-without-profile.md) {% endcontent-ref %} *** ## Screens Alignment Use **Screens Alignment** to reposition individual Calibration Screens or add new Calibration Screens to an already calibrated setup. This workflow is used when the camera, lens, and tracking alignment are already known, but one or more Calibration Screens need to be adjusted or added. #### Required Inputs * Live camera image input * Calibration Screens * Tracking data * Lens Profile * Alignment Profile #### Creates or Updates * Calibration Screen placement * Calibration Screen orientation * Calibration Screen shape / geometry, depending on the screen setup This tool does not create or update: * Lens Profiles * Alignment Profiles #### Typical Use Cases * Repositioning individual Calibration Screens * Adding new Calibration Screens to an existing calibrated stage * Updating Calibration Screen placement while keeping the existing camera and tracking calibration * Adjusting Calibration Screens after parts of the LED setup have changed #### Important Notes This workflow requires an existing Lens Profile and Alignment Profile. Use this tool when the camera system is already calibrated and the goal is only to update the Calibration Screen setup. If the complete camera system needs to be moved in 3D space instead, use **Reposition from Marker** or **Reposition from Screen**. Those tools move the parent object or parent folder instead of changing the Calibration Screen placement. {% content-ref url="/pages/EaETzgf9wMesgFC3iPlh" %} [Screens Alignment](/grid/camera-calibration/reposition-workflows/screens-alignment.md) {% endcontent-ref %} *** ## Summary Repositioning tools are used when the full calibration does not need to be solved again. Use these tools when you need to: * create an Alignment Profile from known points * move an already calibrated camera system as a whole * update Calibration Screen placement without changing Lens Profiles or Alignment Profiles * prepare Calibration Screen placement before calibrating limited-movement camera systems * adjust or add Calibration Screens in an existing calibrated setup For workflows that create Lens Profiles, Alignment Profiles, axis calibration data, or camera object calibration values, use the **Calibration and Alignment Tools** section.