Epson BT-2000 Developers Guide - Page 75

are not completed by the time of the next image data acquisition, the next image

Page 75 highlights

 Important points  You need to describe how image data is handled in the application.  PreviewCallback cannot guarantee the actual time of image acquisition. If there are a high volume of calculations being performed in onPreviewFrame, and these are not completed by the time of the next image data acquisition, the next image data will be corrupted. We recommend acquiring image data through a sub-thread. You can use the following three APIs as the API that registers the callback method. MOVERIO Pro Developer's Guide (Rev.1.0) 71

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MOVERIO Pro Developer's Guide (Rev.1.0)
71
Important points
You need to describe how image data is handled in the application.
PreviewCallback cannot guarantee the actual time of image acquisition. If there
are a high volume of calculations being performed in onPreviewFrame, and these
are not completed by the time of the next image data acquisition, the next image
data will be corrupted. We recommend acquiring image data through a
sub-thread.
You can use the following three APIs as the API that registers the callback method.