# Camera Calibration ## Summary SpatialExplorer allows for Camera Calibration through the use of the images collected during the mission. CameraSnap has two methods of calibration: Unimodal and Crossmodal, both of which require a Pro License. ## Details ### **Unimodal** [Unimodal camera calibration](https://docs.phoenixlidar.com/lidarmill-desktop/post-processing/workflow-kk/camera-snap/camerasnap/unimodal-calibration) analyzes the overlapping images collected and loaded into the SpatialExplorer project It uses aerial triangulation algorithms to calculate intrinsic and extrinsic camera values as well as a fine tuned lens distortion model. ### **Crossmodal** [Crossmodal camera calibration](https://docs.phoenixlidar.com/lidarmill-desktop/post-processing/workflow-kk/camera-snap/camerasnap/crossmodal) combines the unimodal method with direct feedback from the point cloud loaded into the project to utilize additional structural and projection distance information. Crossmodal is far more processing intensive, but adds project-specific understanding which can aid the camera calibration. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs-6.phoenixlidar.com/lidarmill-desktop/post-processing/workflow-kk/camera-snap.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.