Due to this, make sure you can access the app's file e.g. Please note that you need to get the resulting calibration.json from the device in order to integrate it into your project before you can finally deploy it. Use Unity's Build and Runto deploy on your mobile. a smartphone or tablet, you must first deploy the calibration scene to the device and execute it. In order to calibrate the camera of a mobile device, e.g. Simple Camera Calibration on a Mobile Device If you have copied the calibration.json into your Unity project, use this scheme instead: project_dir:calibration.json. this path: local_storage_dir:calibration.json in the Calibration Data Base file of the VLCamera. Note, that VisionLib provides two schemes to address these folders: for the local document folder you can use e.g. In Unity, you can use and reference the calibration in the VLCamera like this: To achieve the latter, copy the calibration.json from the document directory into your Unity project's StreamingAssets/VisionLib directory which is basically where you keep all the. You might keep it on your local machine for development or local use, or you can put it inside your Unity project, in case you want to deploy an app e.g. The generated calibration can be (re)used now. It will either create a new calibration.json file or extend the existing one so that you can store multiple calibrations for different camera or device models within one JSON file. After that, you can store your results in a JSON file by pressing the Write button.Ī destination URI is pre-configured, pointing to the Documents folder of your device. When you have collected about 300-500 images, press the Calibrate button and wait until the calculation has been finished (may take a minute). Please keep all corners of the chessboard visible in the camera image at all time. Aim your camera at the pattern and move the camera slowly towards the pattern from different angles. When the chessboard is recognized, it will be augmented with a grey surface. Now press Play and select your camera to be calibrated. Don't forget to load and set your license file in the properties of the VLCamera first. A higher resolution will lead to more precise results but also requires more processing power. On Windows platform, you can additionally select the resolution that will be used for the calibration by activating the Resolution Selection checkbox in the VLTracking/CameraCalibration GameObject. You can read more about the idea, some recommendations, and how to use the camera calibration in general here. It will guide you through calibrating your camera. In Unit圓D, load the SimpleCameraCalibration scene from VisionLib/Examples/CameraCalibration/Scenes. If that's not possible, print it and put it onto a flat surface. It is recommended to use a second monitor in order to display the pattern (it should be a flat screen). You can find chessboard pattern under VisionLib/Examples/CameraCalibration/Images or download it here. With your camera attached to your local machine, you will need a special chessboard graphic to calibrate the camera. Inside the Examples/CameraCalibration/Scenes folder of the VisionLib SDK for Unity, we provide the SimpleCameraCalibration example to help you calibrating your hardware. For these reasons We strongly recommend the calibration of such cameras. Moreover, it has a negative impact on tracking quality and stability. Please check the calibration status especially for those Android devices you want to use and support.Ī missing calibration affects the superimposition quality of your 3D content: even if the tracking seems to work, your content may still appear misfitted. While this works great on iOS, please note, that this service isn't stable on all Android devices and platforms. VisionLib will use these, when available. That's not a problem per sé, as newer mobile platforms, like iOS since 12.x and Android since API-Level 21 (around Android 5.x), feature information on camera characteristics built-in. In such cases, you get the missing calibration notice. Your web cam, other custom camera hardware, and some android devices might not have been calibrated or are unknown to VisionLib. VisionLib comes with a growing database of camera calibration information. (YouTube Video Tutorial 2/2) Camera Calibration on Mobile Devices.(YouTube Video Tutorial 1/2) Camera Calibration on Mac/PC.The camera calibration process is explained step-by-step in two video tutorial in our YouTube channel: Screenshot from Play Mode in Unit圓D with a missing camera calibration notice.
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