Camera Calibration - Revision history

JKN at 16:42, 24 February 2022

2022-02-24T16:42:19Z

JKN at 16:41, 24 February 2022

2022-02-24T16:41:04Z

JKN at 13:13, 18 February 2022

2022-02-18T13:13:39Z

JKN at 13:09, 18 February 2022

2022-02-18T13:09:14Z

JKN at 12:49, 18 February 2022

2022-02-18T12:49:56Z

JKN at 09:45, 18 February 2022

2022-02-18T09:45:42Z

JKN at 16:49, 3 February 2022

2022-02-03T16:49:17Z

CHI: /* Calibration Procedure */

2018-07-10T07:22:16Z

‎Calibration Procedure

CHI: /* Calibration Procedure */

2018-07-10T07:19:52Z

‎Calibration Procedure

CHI: /* Calibration Procedure */

2017-09-19T13:24:42Z

‎Calibration Procedure

@@ Line 63: / Line 63: @@
 From UBIK 4 onwards, the camera calibration can be done directly on the device. Navigate to Settings -> AR and locate the section ''Camera Calibration''. Right of it there are 3 buttons:
-== Start calibration (Camera symbol {{key press|Android}} {{key press|iOS}} ) ==
+== Start calibration (Camera symbol {{key press|Android}} {{key press|iOS}}) ==
 [[File:CamCal Checkerboard.jpg|thumb|220px|Calibration in progress]]
@@ Line 84: / Line 84: @@
 Return to the settings screen. You will now see text stating ''Device calibrated as [model]'' underneath the ''Camera Calibration'' label. Your device was successfully calibrated.
-== Export calibration (Download symbol) ==
+== Export calibration (Download symbol {{key press|Android}} {{key press|iOS}}) ==
 Exports the currently stored calibration of this device into a text file, that can be used for import on other devices of the same model. The resulting file will be presented in a share dialog.
-== Import calibration {{key press|UWP}} ==
+== Import calibration (Upload symbol {{key press|UWP}}) ==
 The native UWP client does not have the built in camera calibration feature, but it can import calibration files that were previously generated and exported from other clients.

@@ Line 63: / Line 63: @@
 From UBIK 4 onwards, the camera calibration can be done directly on the device. Navigate to Settings -> AR and locate the section ''Camera Calibration''. Right of it there are 3 buttons:
-== Start calibration (Camera symbol) ==
+== Start calibration (Camera symbol {{key press|Android}} {{key press|iOS}} ) ==
 [[File:CamCal Checkerboard.jpg|thumb|220px|Calibration in progress]]
@@ Line 86: / Line 86: @@
 == Export calibration (Download symbol) ==
 Exports the currently stored calibration of this device into a text file, that can be used for import on other devices of the same model. The resulting file will be presented in a share dialog.
 == Delete calibration (Trash bin symbol) ==

@@ Line 53: / Line 53: @@
 <tab name=" UBIK 4">
 [[File:CamCal Settings.jpg|thumb|220px|Camera Calibration in AR Settings]]
 [[File:CamCal Checkerboard.jpg|thumb|220px|Calibration in progress]]
 [[File:CamCal Result.jpg|thumb|220px|Calibration result]]

@@ Line 35: / Line 35: @@
 * Download the camera calibration application from the release portal.
-* Print the asymmetrical circle calibration pattern from the release portal.
+* Download and print the [[:File:AsymetricCalibrationPattern.pdf|asymmetrical circle calibration pattern]].
 * Verify the correct size by measuring the reference length on the upper right corner.
 * Mount the calibration pattern on a planar surface.
@@ Line 56: / Line 56: @@
 == Start calibration (Camera symbol) ==
 == Export calibration (Download symbol) ==

@@ Line 53: / Line 53: @@
 <tab name=" UBIK 4">
 </tab>
 </tabs>

@@ Line 1: / Line 1: @@
-Camera calibration needs to be done once per device model, for features requiring depth estimation (e.g. [[AR-Marker|AR-Markers]]). Currently the following device models are pre-calibrated:
+Camera calibration needs to be done once per device model, for features requiring depth estimation (e.g. [[AR-Marker|AR-Markers]]).
 {| class="wikitable" | width = "25%" style="text-align: center;"
@@ Line 46: / Line 50: @@
 * The camera matrix and distortion coefficients are now saved on the device in the Downloads folder (in the LocalState folder on the WinX client). The device name is used as the filename of the textfile, on WinX the filename is ''CalibrationResult.txt''
 * Forward the calibration file to the development department.

@@ Line 1: / Line 1: @@
-Camera calibration needs to be done once per device model, for features requiring depth estimation (e.g. [[AR-Marker|AR-Markers]]). Currently the following device models are calibrated:
+Camera calibration needs to be done once per device model, for features requiring depth estimation (e.g. [[AR-Marker|AR-Markers]]). Currently the following device models are pre-calibrated:
 {| class="wikitable" | width = "25%" style="text-align: center;"
@@ Line 10: / Line 10: @@
 |-
 | HTC One m7 || Android
 |-
 |}
@@ Line 20: / Line 30: @@
 [[File:CameraCalibrationResultScreenshot.png|thumb|Camera Calibration Result (WinX)]]
-* Download and the camera calibration application from the release portal.
+* Download the camera calibration application from the release portal.
 * Print the asymmetrical circle calibration pattern from the release portal.
 * Verify the correct size by measuring the reference length on the upper right corner.
@@ Line 27: / Line 37: @@
 * Target the calibration pattern with the camera (the pattern gets augmented --> check if the augmentation is placed at the center of the circles before taking a calibration screenshot).
 * Tap on the display to mark a frame for calibration. (Press the Capture Button on the WinX client)
-** The calibration pattern should take up aus much of the camera view as possible.
+** The calibration pattern should take up as much of the camera view as possible.
 ** Keep the camera and calibration pattern stable to not introduce blur.
 ** Take calibration frames from different viewpoints.
 ** Circles of the calibration pattern should also be in the corners of the camera view.
-** Take as much calibration frames as possible (at least 30).
+** Take as many calibration frames as possible (at least 30).
 * After having enough calibration frames, open the menu and press calibration (Press Calibrate on the WinX client).
-* A toast indicates that calibration was done and shows the reprojection error. This error should be as low as possible (lower than 3). On the WinX client the result section can be expanded.
+* On Android a toast indicates that calibration was done and shows the reprojection error. This error should be as low as possible (lower than 3). On the WinX client the result section can be expanded.
-* The camera matrix and distortion coefficients are now saved on the device in the Downloads folder (in the LocalState folder on the WinX client). The device name is used as the filename of the textfile.
+* The camera matrix and distortion coefficients are now saved on the device in the Downloads folder (in the LocalState folder on the WinX client). The device name is used as the filename of the textfile, on WinX the filename is ''CalibrationResult.txt''
 * Forward the calibration file to the development department.

← Older revision		Revision as of 07:19, 10 July 2018
Line 33:		Line 33:
	* The camera matrix and distortion coefficients are now saved on the device in the Downloads folder. The device name is used as the filename of the textfile.		* The camera matrix and distortion coefficients are now saved on the device in the Downloads folder. The device name is used as the filename of the textfile.
	* Forward the calibration file to the development department.		* Forward the calibration file to the development department.
		+
		+	[[File:CameraCalibrationScreenshot.png\|thumb\|Camera Calibration Application (WinX)]]
		+	[[File:CameraCalibrationResultScreenshot.png\|thumb\|Camera Calibration Result (WinX)]]

@@ Line 17: / Line 17: @@
 == Calibration Procedure ==
-.	Download and the camera calibration application from the release portal (link)
+* Download and the camera calibration application from the release portal.
-.	Print the asymmetrical circle calibration pattern from the release portal (link).
+* Print the asymmetrical circle calibration pattern from the release portal.
-.	Verify the correct size by measuring the reference length on the upper right corner.
+* Verify the correct size by measuring the reference length on the upper right corner.
-.	Mount the calibration pattern on a planar surface.
+* Mount the calibration pattern on a planar surface.
-.	Install and open the Camera Calibration application.
+* Install and open the Camera Calibration application.
-.	Target the calibration pattern with the camera (the pattern gets augmented -->
+* Target the calibration pattern with the camera (the pattern gets augmented --> check if the augmentation is placed at the center of the circles before taking a calibration screenshot).
-                check if the augmentation is placed at the center of the circles before taking a calibration screenshot).
+* Tap on the display to mark a frame for calibration.
-.	Tap on the display to mark a frame for calibration.
+** The calibration pattern should take up aus much of the camera view as possible.
-             a.	The calibration pattern should take up aus much of the camera view as possible.
+** Keep the camera and calibration pattern stable to not introduce blur.
-             b.	Keep the camera and calibration pattern stable to not introduce blur.
+** Take calibration frames from different viewpoints.
-             c.	Take calibration frames from different viewpoints.
+** Circles of the calibration pattern should also be in the corners of the camera view.
-             d.	Circles of the calibration pattern should also be in the corners of the camera view.
+** Take as much calibration frames as possible (at least 30).
-             e.	Take as much calibration frames as possible (at least 30).
+* After having enough calibration frames, open the menu and press calibra-tion.
-.	After having enough calibration frames, open the menu and press calibra-tion.
+* A toast indicates that calibration was done and shows the reprojection er-ror. This error should be as low as possible (lower than 3).
-.	A toast indicates that calibration was done and shows the reprojection er-ror. This error should be as low as possible (lower than 3).
+* The camera matrix and distortion coefficients are now saved on the device in the Downloads folder. The device name is used as the filename of the textfile.
-.	The camera matrix and distortion coefficients are now saved on the device in the Downloads folder. The device name is used as the filename of the textfile.
+* Forward the calibration file to the development department.
-.	Forward the calibration file to the development department.