ubuntu下python调用含有opencv Mat类型的so文件的方法

ubuntu生成so文件的方法

参考我的这篇文章：Ubuntu生成so共享库的方法
生成的共享库文件名为libopencv_draw_circle.so

python调用so库文件

将libopencv_draw_circle.so文件python相同文件夹下
python调用代码：

#2019.12.30
#Leo Ma
import ctypes as C
import cv2
import numpy as np

so = C.cdll.LoadLibrary("./libopencv_draw_circle.so")


img = cv2.imread('./ROI0.png')
cv2.imshow('src',img)
cv2.waitKey(0)

(rows, cols) = (img.shape[0], img.shape[1])

ret_img = np.zeros(dtype=np.uint8, shape=(rows, cols, 3))
so.draw_circle(rows, cols, img.ctypes.data_as(C.POINTER(C.c_ubyte)), ret_img.ctypes.data_as(C.POINTER(C.c_ubyte)))

cv2.imshow("src with circle",ret_img)
cv2.waitKey(0)

运行结果：
运行时cv2.imshow()出现报错：

解决办法，Anaconda下重装opencv, 参考这篇文章
The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support

命令行下依次执行：

conda remove opencv

conda install -c menpo opencv

pip install --upgrade pip

pip install opencv-contrib-python

重新运行，运行结果，在原图上画出圆圈：