Fixes to BT pages

Author: qm13

articles/kinect-dk/body-joints.md

@@ -25,7 +25,7 @@ The position and orientation of each joint form its own joint coordinate system.
 
 ## Joint hierarchy
 
-A skeleton includes 24 joints with the joint hierarchy flowing from the center of the body to the extremities. Each connection (bone) links the parent with a child. The figure illustrates the joint locations and connection relative to the human body.
+A skeleton includes 26 joints with the joint hierarchy flowing from the center of the body to the extremities. Each connection (bone) links the parent joint with a child joint. The figure illustrates the joint locations and connection relative to the human body.
 
 ![Joint hierarchy](./media/concepts/joint-hierarchy.png)
 
@@ -48,15 +48,17 @@ The following table enumerates the standard joint connections.
 | 12   |HIP_LEFT       | PELVIS         |
 | 13   |KNEE_LEFT      | HIP_LEFT       |
 | 14   |ANKLE_LEFT     | KNEE_LEFT      |
-| 15   |HIP_RIGHT      | PELVIS         |
-| 16   |KNEE_RIGHT     | HIP_RIGHT      |
-| 17   |ANKLE_RIGHT    | KNEE_RIGHT     |
-| 18   |HEAD           | NECK           |
-| 19   |NOSE           | HEAD           |
-| 20   |EYE_LEFT       | HEAD           |
-| 21   |EAR_LEFT       | HEAD           |
-| 22   |EYE_RIGHT      | HEAD           |
-| 23   |EAR_RIGHT      | HEAD           |
+| 15   |FOOT_LEFT      | ANKLE_LEFT     |
+| 16   |HIP_RIGHT      | PELVIS         |
+| 17   |KNEE_RIGHT     | HIP_RIGHT      |
+| 18   |ANKLE_RIGHT    | KNEE_RIGHT     |
+| 19   |FOOT_RIGHT     | ANKLE_RIGHT    |
+| 20   |HEAD           | NECK           |
+| 21   |NOSE           | HEAD           |
+| 22   |EYE_LEFT       | HEAD           |
+| 23   |EAR_LEFT       | HEAD           |
+| 24   |EYE_RIGHT      | HEAD           |
+| 25   |EAR_RIGHT      | HEAD           |
 
 ## Next steps
 

articles/kinect-dk/body-sdk-setup.md

@@ -14,17 +14,11 @@ keywords: kinect, azure, sensor, access, depth, sdk, body, tracking, joint, setu
 
 # Quickstart: Set up Azure Kinect body tracking
 
-This quickstart will guide you through getting body tracking running on your Azure Kinect DK.
-
-If you don't have an Azure subscription, create a [free account](https://azure.microsoft.com/free/?WT.mc_id=A261C142F) before you begin.
+This quickstart will guide you through the process of getting body tracking running on your Azure Kinect DK.
 
 ## System requirements
 
-- Windows 10 PC
-  - Core i5 or better
-- NVIDIA GPU
-  - GeForce GTX 1070 or better
-  - GeForce RTX 2070 or better
+The Body Tracking SDK requires a NVIDIA GPU. The suggested minimum body tracking host PC requirement is described in [system requirements](system-requirements.md).
 
 ## Install software
 
@@ -61,7 +55,7 @@ Launch the [Azure Kinect Viewer](azure-kinect-sensor-viewer.md) to check that yo
 
 ## Verify body tracking
 
-Launch the `k4abt_simple-3d-viewer.exe` sample to check that the Body Tracking SDK is set up correctly. The single 3d viewer sample uses the Sensor SDK and Body Tracking SDK to visualize body tracking. A pre-compiled binary for the sample is located in the `examples/bin` folder.
+Launch the `k4abt_simple-3d-viewer.exe` sample to check that the Body Tracking SDK is set up correctly. The simple 3d viewer sample uses the Sensor SDK and Body Tracking SDK to visualize body tracking. A pre-compiled binary for the sample is located in the `examples/bin` folder.
 
 If everything is set up correctly, a window with a 3D point cloud and tracked bodies should appear.
 

articles/kinect-dk/get-body-tracking-results.md

@@ -11,7 +11,7 @@ keywords: kinect, azure, sensor, sdk, body, tracking, joint
 
 # Get body tracking results
 
-Body tracking processes an Azure Kinect DK capture to generate body tracking results. It also maintains global status of the tracker, processing queues and the output queue. There are three steps in using the body tracker:
+Body Tracking SDK uses a body tracker object to process an Azure Kinect DK captures and generates body tracking results. It also maintains global status of the tracker, processing queues and the output queue. There are three steps in using the body tracker:
 
 - Create a tracker
 - Capture depth and IR images using Azure Kinect DK
@@ -45,7 +45,7 @@ Image capture using Azure Kinect DK is covered in the section [Retrieve images](
 >[!NOTE]
 > `K4A_DEPTH_MODE_NFOV_UNBINNED` or `K4A_DEPTH_MODE_WFOV_2X2BINNED` modes are recommended for best performance and accuracy. Do not use the `K4A_DEPTH_MODE_OFF` or `K4A_DEPTH_MODE_PASSIVE_IR` modes.
 
-The supported Azure Kinect DK modes are described [here](hardware-specification.md) and [k4a_depth_mode_t](https://microsoft.github.io/Azure-Kinect-Sensor-SDK/master/index.html)
+The supported Azure Kinect DK modes are described in the Azure Kinect DK [hardware specification](hardware-specification.md) and [k4a_depth_mode_t](https://microsoft.github.io/Azure-Kinect-Sensor-SDK/master/index.html) structure.
 
 ```C
 // Capture a depth frame

articles/kinect-dk/media/concepts/joint-coordinates.png

@@ -24,9 +24,9 @@ The Sensor SDK is available for the Windows API (Win32) for native C/C++ Windows
 
 To contribute to sensor SDK development, visit [GitHub](https://github.com/Microsoft/Azure-Kinect-Sensor-SDK).
 
-## General host PC hardware requirements
+## Minimum host PC hardware requirements
 
-The general PC host hardware requirement is dependent on application/algorithm/sensor frame rate/resolution executed on host PC. Recommended minimum Sensor SDK configuration for Windows is:
+The PC host hardware requirement is dependent on application/algorithm/sensor frame rate/resolution executed on host PC. Recommended minimum Sensor SDK configuration for Windows is:
 
 - Seventh Gen Intel® CoreTM i3 Processor (Dual Core 2.4 GHz with HD620 GPU or faster)
 - 4 GB Memory
@@ -38,7 +38,7 @@ Performance differs also between Windows/Linux operating systems and graphics dr
 
 ## Body tracking host PC hardware requirements
 
-The body tacking PC host requirement is more stringent than the general PC host requirement. Recommended minimum Body Tracking SDK configuration for Windows is:
+The body tracking PC host requirement is more stringent than the general PC host requirement. Recommended minimum Body Tracking SDK configuration for Windows is:
 
 - Seventh Gen Intel® CoreTM i5 Processor (Quad Core 2.4 GHz or faster)
 - 4 GB Memory