Dewarping SDK dewarp single images

[Daholli]

Heyho,

The SDK samples did not really help me thus far, so now I've come here to ask.

Given a video stream that is parsed externally frame by frame, how would I use the SDK to dewarp the individual pictures, I would have assumed i can just provide two pointers one where i put in pictures and one where i take them out, but so far I did not find such functions, is there something I am missing?

Best Christoph

[github-actions[bot]]

This automatically generated reply acts as a friendly reminder.

Answers to your questions will most often come from the community, from developers like yourself. You will, from time to time, find that Axis employees answers some of the questions, but this is not a guarantee. Think of the discussion forum as a complement to other support channels, not a replacement to any of them.

If your question remains unanswered for a period of time, please revisit it to see whether it can be improved by following the guidelines listed in Axis support guidelines.

[vivekatoffice]

Hi @Daholli ,
Please check this discussion: 747 (defisheye)

If you are interested in dewarping using AXIS Dewarping SDK, these are the Axis Models supported according to the release note:

Reference

[Daholli]

Heyho,

yeah I did have a look at it, but this does not really accomplish what I wanted to do,
I do want to use the DirectShowfilters in either C# or C++ but all the examples require the usage of the AxisMediaParser, but as said previously the examples do not let me define a pointer to some image buffer, and wrapping the AxisMediaParser to "open the video" seems very silly and would not allow and service that does not have a graphical interface to do decoding + dewarping

Best
Christoph

[vivekatoffice]

Hi @Daholli ,
The AXIS Dewarping SDK uses AXIS Media Parser SDK and AXIS Media Viewer(AMV) to read from files and to render but you don't have to use AMP/AMV if you don't want to.

Please take a look at the DewarpDMO example (AXIS Dewarping SDK\Samples\DewarpDMO).

Reference: C:\Program Files (x86)\Axis Communications\AXIS Dewarping SDK\Samples\DewarpDMO\README.html

In the OnDecodedImage function you can see how to send a buffer to be dewarped and how to retrieve it again:

 // Deliver warped input frame to transform
 if(SUCCEEDED(hr))
 {
   IMediaBufferPtr anInputBuffer;
   hr = CMediaBuffer::Create(aVideoSampleBuffer, m_inputFrameSize, &anInputBuffer);
   if(SUCCEEDED(hr))
   {
     hr = m_mediaObject->ProcessInput(0, anInputBuffer, 0, 0, 0);
   }
 }

 // Perform dewarping of current input
 // Can be called multiple times to generate different views for same input frame
 if(SUCCEEDED(hr))
 {
   DWORD anOutputStatus;
   DMO_OUTPUT_DATA_BUFFER aOutputBuffer;
   aOutputBuffer.pBuffer = m_outputBuffer;
   m_outputBuffer->SetLength(0);
   hr = m_mediaObject->ProcessOutput(0, 1, &aOutputBuffer, &anOutputStatus);

   if(S_OK == hr)
   {
     hr = RenderFrame();
   }
 }