[question] Help Setting Camera Intrinsics via --overrides .json file

[Viv-G]

Describe the problem
As part of a project, I am capturing a raw image feed from a mobile phone from its CPU. This allows me to get an image, and it's intrinsic's on the mobile and transfer them to a server for post-processing. I call Meshroom from the command line via a script, which includes a setup.mg file and an --overrides .json file.

I write the --overrides .json file using Python which includes the camera intrinsics that I want to use.
An example is shown below of the output.

        "CameraInit_1": {
				"intrinsics": [
                    {
                        "intrinsicId": 2561805385,
                        "pxInitialFocalLength": -1.0,
                        "pxFocalLength": 1458.1,
                        "type": "radial3",
                        "width": 1080,
                        "height": 1920,
                        "serialNumber": "C:/Server/img",
                        "principalPoint": {
                            "x": 554.0,
                            "y": 908.7
                        },
                        "initializationMode": "estimated",
                        "distortionParams": [
                            0.0,
                            0.0,
                            0.0
                        ],
                        "locked": false
                    }
				],
                "defaultFieldOfView": 40.64392
        }
}

When I run Meshroom it fails at the camera_init node. I believe it is due to the intrinsics ID field not matching that of the images.

I have tried using

 "intrinsicId":-1
""intrinsicId": "",
"intrinsicId": ,

And also just leaving the intrinsicsId field out completely.

I run a keyFrame node before running cameraInit, and point the input from cameraInit to the output of the keyFrame node, but I had this error before that step as well...

Log

Program called with the following parameters:
 * allowSingleView = 1
 * defaultCameraModel = "" (default)
 * defaultFieldOfView = 40.6439
 * defaultFocalLengthPix = -1 (default)
 * defaultIntrinsic = "" (default)
 * groupCameraFallback =  Unknown Type "enum EGroupCameraFallback"
 * imageFolder = "" (default)
 * input = "F:/Viv/Documents/Uni/sem1_2019/FYP/MESHROOM_LIVESCAN/Work/12_15/s8/CameraInit/638e1f854b9c74628c6ec7c8ae4756a89127f105//viewpoints.sfm"
 * output = "F:/Viv/Documents/Uni/sem1_2019/FYP/MESHROOM_LIVESCAN/Work/12_15/s8/CameraInit/638e1f854b9c74628c6ec7c8ae4756a89127f105/cameraInit.sfm"
 * sensorDatabase = "C:\Server\Meshroom\aliceVision\share\aliceVision\cameraSensors.db"
 * verboseLevel = "debug"

Status

{
    "status": "ERROR",
    "execMode": "LOCAL",
    "nodeName": "CameraInit_1",
    "nodeType": "CameraInit",
    "packageName": "aliceVision",
    "packageVersion": null,
    "graph": "",
    "commandLine": "aliceVision_cameraInit  --sensorDatabase \"C:\\Server\\Meshroom\\aliceVision\\share\\aliceVision\\cameraSensors.db\" --defaultFieldOfView 40.64392 --groupCameraFallback folder --verboseLevel debug --output \"F:/Viv/Documents/Uni/sem1_2019/FYP/MESHROOM_LIVESCAN/Work/12_15/s8/CameraInit/638e1f854b9c74628c6ec7c8ae4756a89127f105/cameraInit.sfm\" --allowSingleView 1  --input \"F:/Viv/Documents/Uni/sem1_2019/FYP/MESHROOM_LIVESCAN/Work/12_15/s8/CameraInit/638e1f854b9c74628c6ec7c8ae4756a89127f105//viewpoints.sfm\"",
    "env": null,
    "startDateTime": "2019-10-22 12:16:04.411078",
    "endDateTime": "",
    "elapsedTime": 0,
    "hostname": "DESKTOP-SC42VCL",
    "sessionUid": "83e27c8a-f469-11e9-a3f8-480fcf4b9ddc",
    "returnCode": 3221226505,
    "elapsedTimeStr": "0:00:00"
}

Desktop (please complete the following and other pertinent information):

• OS: Win 10
• Python version 3.7.1
• Qt/PySide version [e.g. 5.12.4]
• Meshroom version: please specify if you are using a release version or your own build
  • Binary version 2019.2

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[natowi]

See #683 (comment)

[dimitrisPs]

To use meshroom_batch with pre-computed calibration parameters you need to specify the --input flag to point to a .json file containing both your intrinsics and views, instead of the folder containing your images.

The .json file needs to be in the same format as the cameraInit.sfm, generated from the CamerInit node inside the MeshroomCache directory when you are running Meshroom GUI. You can still tweak parameters for the rest of your pipeline using the --overrides flag