• Hardware Platform (Jetson / GPU) Jetson Nano
• DeepStream Version 5.0
• JetPack Version (valid for Jetson only) 4.4-b144
• TensorRT Version 7.1.3
• Issue Type( questions, new requirements, bugs) question
Hello,
I am wondering what is possible to do by exploiting NvBufSurfTransform.
Looking at this page: NVIDIA DeepStream SDK API Reference: Image Transformation and Compositing API there are a number of possibilities, for example:
| id | description |
|---|---|
| NvBufSurfTransform_None | Specifies no video flip. |
| NvBufSurfTransform_Rotate90 | Specifies rotating 90 degrees clockwise. |
| NvBufSurfTransform_Rotate180 | Specifies rotating 180 degree clockwise. |
| NvBufSurfTransform_Rotate270 | Specifies rotating 270 degree clockwise. |
| NvBufSurfTransform_FlipX | Specifies video flip with respect to the X-axis. |
| NvBufSurfTransform_FlipY | Specifies video flip with respect to the Y-axis. |
| NvBufSurfTransform_Transpose | Specifies video flip transpose. |
| NvBufSurfTransform_InvTranspose | Specifies video flip inverse transpose. |
But I also see:
| id | description |
|---|---|
| NVBUFSURF_TRANSFORM_CROP_SRC | Specifies a transform to crop the source rectangle. |
| NVBUFSURF_TRANSFORM_CROP_DST | Specifies a transform to crop the destination rectangle. |
| NVBUFSURF_TRANSFORM_FILTER | Specifies a transform to set the filter type. |
| NVBUFSURF_TRANSFORM_FLIP | Specifies a transform to set the flip method. |
What does NVBUFSURF_TRANSFORM_FILTER do?
I am asking this because I would like to multiply every single pixel of a buffer by a matrix that is mixing the colors.
new_pixel(i,j) = M * pixel(i,j)
Something that I can obtain in OpenCV with cv.transform API: Operations on Arrays — OpenCV 2.4.13.7 documentation
Finally, is there any example of this API: NvBufSurfTransformCompositeBlend ?
https://docs.nvidia.com/metropolis/deepstream/sdk-api/BufSurfTransform/BufSurfTransform.html#group__ds__bbb_1gabafcd5ad1d2d3fa801217a7419e1dcee
Thank you very much!!