As of the release of iSTAR Pulsar firmware v2.2 on 26th February 2019, it is now possible to specify the rate at which iSTAR Pulsar captures data. The two way of dictating the rate of capture are Image Count Spacing and Distance Spacing.
Capture data uploaded to VR.World and processed in the Cloud will be processed in full - that is, all captured frames will be stitched. For this reason, users following this workflow should ensure that they have selected their desired rate prior to capturing their data.
Data that will be downloaded directly from iSTAR Pulsar+ and processed offline in Immersive Studio may be captured and processed in one of two ways:
- Data is captured at the maximum rate of 7fps (Image Count Spacing: 1) - users may then specify in Immersive Studio the frames to be stitched based on either time or distance
- Data captured at a custom rate, anything other than 7fps, will be be processed as-is in Immersive Studio - all frames captured will be stitched.
Users may switch to and configure their preferred capture rate method by connecting their mobile device to the iSTAR Pulsar unit, launching the mobile app, and browsing to the "Settings" option in the main menu:
Within the "Preferences" tab, users may toggle between Image Count Spacing and Distance Spacing and configure them at the bottom of the page by populating the relevant box with an appropriate value and then tapping away from it:
Image Count Spacing
Allows users to set their device to capture frames at a set frequency as opposed to at a set distances as before.
Selecting this mode and using the default value of "1" will result in iSTAR Pulsar capturing at the maximum rate of 7 frames per second (fps), regardless of distance traveled. Here is a table illustrating how modifying this setting affects capture rate:
|Setting Value||Capture Rate|
|0||7 frames per second|
|1||7 frames per second|
|2||7 frames every 2 seconds|
|3||7 frames every 3 seconds|
|7||7 frames every 7 seconds (1 frame per second)|
|70 (max value)||70 frames every 7 seconds (1 frame every 10 seconds)|
Allows users to set their device to capture frames at a set distance - for example, prior to v2.2 firmware being released iSTAR Pulsar captured at a set rate of 1 frame every 4 meters.
Users may now enable Distance Spacing and customise this as follows:
|Setting Value||Capture Rate|
|0 m||7 frames per second (no distance spacing applied)|
|1 m||1 frame per meter traveled|
|2 m||1 frame per every 2 meters traveled|
|3 m||1 frame per every 3 meters traveled|
|4 m||1 frame per every 4 meters traveled|
|20 m (max value)||1 frame per every 20 meters traveled|
Distance space requires a clear continuous GPS signal in order to operate, therefore this is not selectable when capturing using an Indoor capture mode.
Users should note that changing Capture Mode will always reset rate of capture to the mode's own default value (see this article) - as such, when changing Capture Mode, users should always check the Capture Rate and modify it if desired.