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Add Python binding to another overload of segNet::Mask #476

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Add Python binding to another overload of segNet::Mask #476

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1b9e501
integral parameters
hanzhi713 Jan 11, 2020
cd16f62
binding for another overload of segNet::Mask
hanzhi713 Jan 11, 2020
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63 changes: 62 additions & 1 deletion python/bindings/PySegNet.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -367,6 +367,66 @@ static PyObject* PySegNet_Mask( PySegNet_Object* self, PyObject* args, PyObject
}


#define DOC_MASKCLASS "Produce a grayscale binary segmentation mask, where the pixel values correspond to the class ID of the corresponding class type.\n\n" \
"Parameters:\n" \
" image (capsule) -- output CUDA memory capsule\n" \
" width (int) -- width of the image (in pixels)\n" \
" height (int) -- height of the image (in pixels)\n" \
"Returns: (none)"

// Class Id Mask
static PyObject* PySegNet_MaskClass( PySegNet_Object* self, PyObject* args, PyObject *kwds )
{
if( !self || !self->net )
{
PyErr_SetString(PyExc_Exception, LOG_PY_INFERENCE "segNet invalid object instance");
return NULL;
}

// parse arguments
PyObject* capsule = NULL;

int width = 0;
int height = 0;

static char* kwlist[] = {"image", "width", "height", NULL};

if( !PyArg_ParseTupleAndKeywords(args, kwds, "Oii", kwlist, &capsule, &width, &height))
{
PyErr_SetString(PyExc_Exception, LOG_PY_INFERENCE "segNet.Mask() failed to parse args tuple");
printf(LOG_PY_INFERENCE "segNet.Mask() failed to parse args tuple\n");
return NULL;
}

// verify dimensions
if( width <= 0 || height <= 0 )
{
PyErr_SetString(PyExc_Exception, LOG_PY_INFERENCE "segNet.Mask() image dimensions are invalid");
return NULL;
}

// get pointer to image data
void* img = PyCUDA_GetPointer(capsule);

if( !img )
{
PyErr_SetString(PyExc_Exception, LOG_PY_INFERENCE "segNet.Mask() failed to get image pointer from PyCapsule container");
return NULL;
}

// visualize the image
const bool result = self->net->Mask((uint8_t*)img, width, height);

if( !result )
{
PyErr_SetString(PyExc_Exception, LOG_PY_INFERENCE "segNet.Mask() encountered an error segmenting the image");
return NULL;
}

Py_RETURN_NONE;
}


#define DOC_GET_NETWORK_NAME "Return the name of the built-in network used by the model.\n\n" \
"Parameters: (none)\n\n" \
"Returns:\n" \
Expand Down Expand Up @@ -498,7 +558,8 @@ static PyMethodDef PySegNet_Methods[] =
{
{ "Process", (PyCFunction)PySegNet_Process, METH_VARARGS|METH_KEYWORDS, DOC_PROCESS},
{ "Overlay", (PyCFunction)PySegNet_Overlay, METH_VARARGS|METH_KEYWORDS, DOC_OVERLAY},
{ "Mask", (PyCFunction)PySegNet_Mask, METH_VARARGS|METH_KEYWORDS, DOC_MASK},
{ "Mask", (PyCFunction)PySegNet_Mask, METH_VARARGS|METH_KEYWORDS, DOC_MASK},
{ "MaskClass", (PyCFunction)PySegNet_MaskClass, METH_VARARGS|METH_KEYWORDS, DOC_MASKCLASS},
{ "GetNetworkName", (PyCFunction)PySegNet_GetNetworkName, METH_NOARGS, DOC_GET_NETWORK_NAME},
{ "GetNumClasses", (PyCFunction)PySegNet_GetNumClasses, METH_NOARGS, DOC_GET_NUM_CLASSES},
{ "GetClassDesc", (PyCFunction)PySegNet_GetClassDesc, METH_VARARGS, DOC_GET_CLASS_DESC},
Expand Down
6 changes: 3 additions & 3 deletions python/examples/segnet-camera.py
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Original file line number Diff line number Diff line change
Expand Up @@ -55,7 +55,7 @@

# allocate the output images for the overlay & mask
img_overlay = jetson.utils.cudaAllocMapped(opt.width * opt.height * 4 * ctypes.sizeof(ctypes.c_float))
img_mask = jetson.utils.cudaAllocMapped(opt.width/2 * opt.height/2 * 4 * ctypes.sizeof(ctypes.c_float))
img_mask = jetson.utils.cudaAllocMapped(opt.width * opt.height * ctypes.sizeof(ctypes.c_float))

# create the camera and display
camera = jetson.utils.gstCamera(opt.width, opt.height, opt.camera)
Expand All @@ -71,12 +71,12 @@

# generate the overlay and mask
net.Overlay(img_overlay, width, height, opt.filter_mode)
net.Mask(img_mask, width/2, height/2, opt.filter_mode)
net.Mask(img_mask, width // 2, height// 2, opt.filter_mode)

# render the images
display.BeginRender()
display.Render(img_overlay, width, height)
display.Render(img_mask, width/2, height/2, width)
display.Render(img_mask, width // 2, height // 2, width)
display.EndRender()

# update the title bar
Expand Down