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To expose the shared python buffer from C++ side:

PyObject* :GetBufferPtr(Image img, long width, long height) { ..... Py_buffer pybuffer; //where buf points to a void* for image pixel int res = PyBuffer_FillInfo(&pybuffer, 0, buf, val, false, PyBUF_CONTIG); .. return PyMemoryView_FromBuffer(&pybuffer); }

To retrieve image buffer from Python's side and update the buffer from Python side: import myLib import cv2 import numpy as np imgPtr = myLib.GetImgBuffer(img1, cols1, rows1) numpy_array = np.frombuffer(imgPtr, dtype=np.uint8) //for one byte integer image numpy_array.shape = (rows1, cols1) //change the image in python dst = np.ones((rows1,cols1), dtype=np.uint8)

//update data in the buffer np.copyto(numpy_array, dst) //update the buffer numpy_array.shape = dst.shape

**Now, if you refresh your display in the C++ app, you will see the updated change from Python

Have fun coding!

To expose the shared python buffer from C++ side:

PyObject* :GetBufferPtr(Image img, long width, long height) 
{ .....
  Py_buffer pybuffer; //where buf points to a void* for image pixel 
  int res = PyBuffer_FillInfo(&pybuffer, 0, buf, val, false, PyBUF_CONTIG); 
  .. 
  return PyMemoryView_FromBuffer(&pybuffer); 
}
}

import myLib
import cv2 
import numpy as np 
imgPtr = myLib.GetImgBuffer(img1, cols1, rows1) 
numpy_array = np.frombuffer(imgPtr, dtype=np.uint8)  //for one byte integer image
numpy_array.shape = (rows1, cols1)
//change the image in python
dst = np.ones((rows1,cols1), dtype=np.uint8)
dtype=np.uint8)
  
//update data in the buffer
np.copyto(numpy_array, dst) //update the buffer
numpy_array.shape = dst.shapedst.shape