Compass - Revision history

CHI at 13:46, 19 September 2017

2017-09-19T13:46:29Z

CHI: /* Compass Calibration */

2017-09-19T13:13:09Z

‎Compass Calibration

CHI: /* Characteristics */

2017-09-19T13:12:56Z

‎Characteristics

CHI: /* Compass Calibration */

2017-09-19T11:50:25Z

‎Compass Calibration

CHI at 11:49, 19 September 2017

2017-09-19T11:49:45Z

CHI: /* Characteristics */

2017-09-19T11:47:43Z

‎Characteristics

CHI: Created page with "The Compass internally utilizes the accelerometer and magnetometer to estimate the device orientation in relation to the magnetic north. As the compass is vulnera-ble to exter..."

2017-09-19T11:47:17Z

Created page with "The Compass internally utilizes the accelerometer and magnetometer to estimate the device orientation in relation to the magnetic north. As the compass is vulnera-ble to exter..."

New page

The Compass internally utilizes the accelerometer and magnetometer to estimate the device orientation in relation to the magnetic north. As the compass is vulnera-ble to external influences, it is recommended to disable the Compass in the pres-ence of strong magnetic fields.

== Characteristics ==

• Provides orientation in world coordinate system.
• The error in orientation estimation is characterized by an offset between real and estimated device orientation. Typically an accuracy of 10-20° is achieved. In the presence of strong
magnetic fields orientation estimation is unusable.
• Pose estimation suffers from noticeable jitter if Compass is used as the only orientation source.
• The orientation is updated with roughly 250Hz.
• Orientation estimation is not responsive and suffers from noticeable delays.
• Requires accelerometer and magnetometer.

@@ Line 1: / Line 1: @@
-The Compass internally utilizes the accelerometer and magnetometer to estimate the device orientation in relation to the magnetic north. As the compass is vulnera-ble to external influences, it is recommended to disable the Compass in the pres-ence of strong magnetic fields.
+The Compass internally utilizes the accelerometer and magnetometer to estimate the device orientation in relation to the magnetic north. As the compass is vulnerable to external influences, it is recommended to disable the Compass in the presence of strong magnetic fields.
 == Characteristics ==
@@ Line 13: / Line 13: @@
 == Compass Calibration ==
-To compensate the offset between real and estimated device orientation, the com-pass offset can be calibrated, by one of these three mechanisms:
+To compensate the offset between real and estimated device orientation, the compass offset can be calibrated, by one of these three mechanisms:
 * Manually specify the compass offset in the [[Settings]].
 * Once the [[POI_View#Compass_calibration_button|Compass Calibration Button]] in the [[POI_View|POI View]] is clicked, the Compass will behave as if the current heading was north.
-* Once an [[AR-Marker]] used for device pose estimation is scanned, the Compass offset is automatically calibrated.
+* Once an [[AR-Marker]], used for device pose estimation, is scanned, the Compass offset is automatically calibrated.

@@ Line 15: / Line 15: @@
 To compensate the offset between real and estimated device orientation, the com-pass offset can be calibrated, by one of these three mechanisms:
-       •	Manually specify the compass offset in the [[Settings]].
+* Manually specify the compass offset in the [[Settings]].
-       •	Once the [[POI_View#Compass_calibration_button|Compass Calibration Button]] in the [[POI_View|POI View]] is clicked, the Compass will behave as if the current heading was north.
+* Once the [[POI_View#Compass_calibration_button|Compass Calibration Button]] in the [[POI_View|POI View]] is clicked, the Compass will behave as if the current heading was north.
-       •	Once an [[AR-Marker]] used for device pose estimation is scanned, the Compass offset is automatically calibrated.
+* Once an [[AR-Marker]] used for device pose estimation is scanned, the Compass offset is automatically calibrated.

@@ Line 16: / Line 16: @@
         •	Manually specify the compass offset in the [[Settings]].
-        •	Once the Compass Calibration Button in the [[POI_View|POI View]] is clicked, the Compass will behave as if the current heading was north.
+        •	Once the [[POI_View#Compass_calibration_button|Compass Calibration Button]] in the [[POI_View|POI View]] is clicked, the Compass will behave as if the current heading was north.
         •	Once an [[AR-Marker]] used for device pose estimation is scanned, the Compass offset is automatically calibrated.

← Older revision		Revision as of 11:49, 19 September 2017
Line 10:		Line 10:
	• Orientation estimation is not responsive and suffers from noticeable delays.		• Orientation estimation is not responsive and suffers from noticeable delays.
	• Requires accelerometer and magnetometer.		• Requires accelerometer and magnetometer.
		+
		+	== Compass Calibration ==
		+
		+	To compensate the offset between real and estimated device orientation, the com-pass offset can be calibrated, by one of these three mechanisms:
		+
		+	• Manually specify the compass offset in the [[Settings]].
		+	• Once the Compass Calibration Button in the [[POI_View\|POI View]] is clicked, the Compass will behave as if the current heading was north.
		+	• Once an [[AR-Marker]] used for device pose estimation is scanned, the Compass offset is automatically calibrated.

@@ Line 3: / Line 3: @@
 == Characteristics ==
-       •	Provides orientation in world coordinate system.
+* Provides orientation in world coordinate system.
-       •	The error in orientation estimation is characterized by an offset between real and estimated device orientation. Typically an accuracy of 10-20° is achieved.
+* The error in orientation estimation is characterized by an offset between real and estimated device orientation. Typically an accuracy of 10-20° is achieved. In the presence of strong magnetic fields orientation estimation is unusable.
-         In the presence of strong magnetic fields orientation estimation is unusable.
+* Pose estimation suffers from noticeable jitter if Compass is used as the only orientation source.
-       •	Pose estimation suffers from noticeable jitter if Compass is used as the only orientation source.
+* The orientation is updated with roughly 250Hz.
-       •	The orientation is updated with roughly 250Hz.
+* Orientation estimation is not responsive and suffers from noticeable delays.
-       •	Orientation estimation is not responsive and suffers from noticeable delays.
+* Requires accelerometer and magnetometer.
-       •	Requires accelerometer and magnetometer.
 == Compass Calibration ==