我需要将C ++的OpenCv映像发送到Python,以对其进行一些处理。 Mat将通过代码接收,但为简单起见,我在此处使用imread这个问题。
我在代码的C ++部分中所做的是:
#include <Python.h>
#include <arrayobject.h>
#include <iostream>
#include <opencv2/opencv.hpp>
#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION
using namespace cv;
using namespace std;
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
Mat image = imread("test.jpg");
Py_Initialize();
PyObject *pName, *pModule, *pDict, *pFunc, *pArgs, *pValue;
pName = PyUnicode_FromString("prog");
if (pName == NULL)
{
PyErr_Print();
return 0;
}
pModule = PyImport_Import(pName);
if (pModule == NULL)
{
PyErr_Print();
return 0;
}
pDict = PyModule_GetDict(pModule);
pFunc = PyDict_GetItemString(pDict, "add");
if (pFunc == NULL)
{
PyErr_Print();
return 0;
}
pArgs = PyTuple_New(1);
import_array ();
npy_intp dimensions[3] = {image.rows, image.cols, image.channels()};
pValue = PyArray_SimpleNewFromData(image.dims + 1, (npy_intp*)&dimensions, NPY_UINT8, image.data);
PyTuple_SetItem(pArgs, 0, pValue);
PyObject* pResult = PyObject_CallObject(pFunc, pArgs);
if(pResult == NULL)
cout<<"Calling the add method failed"<<endl;
long result = PyLong_AsLong(pResult);
cout<<"Result = "<<result<<endl;
Py_Finalize();
return 0;
}
此代码编译并运行。
对于Python部分:
import cv2
import numpy as np
def add (a):
print ("Contents of a :")
print (a)
# mat_array = cv2.fromarray(a, numpy.float32)
vis0 = cv.fromarray(a)
return 0
Python代码从C ++接收numpy数组(我认为),当我打印a
的内容时,我有一个输出(所以我认为我从C ++接收图像)。
现在,我需要将a
中的数据转换为Python中的cv2 Mat,以便对其进行处理。
一旦我到达mat_array = cv2.fromarray(a, numpy.float32)
行或vis0 = cv.fromarray(a)
,代码就会崩溃,并显示以下输出:
Exception ignored in: <module 'threading' from '/usr/lib/python3.5/threading.py'>
Traceback (most recent call last):
File "/usr/lib/python3.5/threading.py", line 1283, in _shutdown
assert tlock.locked()
SystemError: <built-in method locked of _thread.lock object at 0x7ff0f34d20d0> returned a result with an error set
如何正确发送/接收Mat对象?