Live Annotations
  
Live Annotations
Before annotations are available in a Chalk call, Chalk needs to successfully create a map of your environment; this mapping allows annotations to stick to the environment. Live annotations also depend on the device being used to share its view, so it’s important that the device is officially supported with Chalk.
Unsupported devices have not been tested or verified for the computer vision-based tracking Chalk uses. Some devices may also not have the required hardware to allow for AR capabilities (for example, a gyroscope or not enough memory/CPU power). If paired with a supported device, unsupported devices will still be able to draw annotations when not sharing their view.
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If you are using Chalk for Desktop, the other person you are Chalking with must be using a supported device.
Below are a few things that you can do to make sure you have the best and most successful Chalk session while using live annotations.
Use Supported Devices
While it’s important that both users devices are supported, it’s most important that the person who is sharing their view is using a supported device. Before you begin a Chalk session make sure you’re using a supported device. For more information, see Supported Devices.
Help Chalk Learn Your Environment
If you’re sharing your view during a Chalk session, you’ll need to help Chalk learn your environment at the very beginning of the session.
The following things help create the best environment when in a Chalk session:
The environment where you Chalk should have a lot of defined features.
A well lit area will perform better. You can use your device’s light if necessary.
Avoid reflective or plain colored (blank) surfaces.
Chalk marks stick best to objects which do not move.
Once you’ve optimized your environment and begin sharing your view, you should see the following message:
Once this message appears, move slowly and steadily around the area you’ll be showing the other user for help. It’s important that the camera sees the environment from different angles so it can map it successfully.
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If Chalk does not successfully map your environment, either re-try or skip this step. However, if you choose to skip this step your session will be Audio/Video only, and you will not be able to use live annotations.
When helping Chalk learn your environment keep the following in mind in regard to you movements:
Keep movement fluid and slow
Forward and backward smooth motion is best to allow device to create mapping
Small circles in front of the object are also good
Do not rotate your device. Keep the device’s orientation fixed, moving in parallel to the object of interest and keeping the latter in view during initialization movement.
Chalk Marks Best Practices
When you’ve mapped the environment well enough, you’ll see the following message and can start using live annotations and drawing Chalk Marks.
The first time you use Chalk, make sure you select a color for your Chalk Marks. This makes it easier to differentiate your marks from the person you are Chalking with.
Here a few things to keep in mind when drawing Chalk Marks:
Use simple drawings to communicate instructions.
Circles, lines, & arrows work best.
Delete Chalk marks that are no longer needed to reduce clutter,
Use the pause button to draw on a steady image.