Documentation for capture intent

Autonomous Machines Jetson & Embedded Systems Jetson TX2
#1

Argus::ICaptureSession::createRequest takes an intent parameter that defaults to CAPTURE_INTENT_PREVIEW. The only documentation I can find on these are some comments in Types.h:

/**

  • A CaptureIntent may be provided during capture request creation to initialize the new
  • Request with default settings that are appropriate for captures of the given intent.
  • For example, a PREVIEW intent may disable post-processing in order to reduce latency
  • and resource usage while a STILL_CAPTURE intent will enable post-processing in order
  • to optimize still image quality.
    */
    DEFINE_NAMED_UUID_CLASS(CaptureIntent);
    DEFINE_UUID(CaptureIntent, CAPTURE_INTENT_MANUAL, FB3F3663,CC62,11E5,9956,62,56,62,87,07,61);
    DEFINE_UUID(CaptureIntent, CAPTURE_INTENT_PREVIEW, FB3F3664,CC62,11E5,9956,62,56,62,87,07,61);
    DEFINE_UUID(CaptureIntent, CAPTURE_INTENT_STILL_CAPTURE, FB3F3665,CC62,11E5,9956,62,56,62,87,07,61);
    DEFINE_UUID(CaptureIntent, CAPTURE_INTENT_VIDEO_RECORD, FB3F3666,CC62,11E5,9956,62,56,62,87,07,61);
    DEFINE_UUID(CaptureIntent, CAPTURE_INTENT_VIDEO_SNAPSHOT, FB3F3667,CC62,11E5,9956,62,56,62,87,07,61);

Is there a more in-depth explanation available? Exactly what settings are changed based on this value? How does CAPTURE_INTENT_PREVIEW differ from CAPTURE_INTENT_VIDEO_RECORD?

#2

They are define the default control properties for different use case.
You also can change them by the control API.

#3

Yes, but exactly what properties do they control? Anything besides post-processing, etc…? By post-processing, does that mean denoise, edge-enhancement, anything else? That’s my question. Also, what’s the difference between CAPTURE_INTENT_PREVIEW and CAPTURE_INTENT_VIDEO_RECORD? It seems very strange to make this a setting and then provide no useful documentation on it.

#4

Bumping one last time. Hopefully someone knows what these do.

#5

We have an internal discussion to check if we can have some doc for this.

#6

Curious if there was ever documentation for this?

I was also curious about NvBufferTag that’s specified in NvBufferCreateParams. Do the different values actually do anything? Will setting NvBufferTag_NONE vs NvBufferTag_CAMERA vs NvBufferTag_JPEG change behavior anywhere?

#7

Is there any more documentation available for the difference between CAPTURE_INTENT_PREVIEW and CAPTURE_INTENT_VIDEO_RECORD?

#9

Have a check the …/public/include/Argus/Types.h from multimedia API source.

/**
 * A CaptureIntent may be provided during capture request creation to initialize the new
 * Request with default settings that are appropriate for captures of the given intent.
 * More details regarding each intent are as follows:
 * MANUAL intent disables auto white balance and auto-focus.
 * PREVIEW intent disables noise reduction related post-processing in order to
 * reduce latency and resource usage.
 * STILL_CAPTURE intent enables Noise Reduction related post-processing in order
 * to optimize still image quality.
 * VIDEO_RECORD intent enables motion sensors related post-processing to optimize
 * the video quality.
 * Apart from above processing blocks each intent also helps in optimizing the
 * processing resource usage appropriate for that intent.
 */