opencv-python常用函数

一、安装

pip install opencv-python

二、图像读写

• cv2.imread(path, flag) 返回值类型：np.ndarray
• cv2.imwrite(filename, image)

三、常用绘图

• cv2.rectangle(image, start_point, end_point, color, thickness) start_point: 左上，end_point：右下

• cv2.circle(image, center_coordinates, radius, color, thickness) center_coordinates：中心点，radius：半径

• cv2.putText(image, text, org, font, fontScale, color[, thickness[, lineType[, bottomLeftOrigin]]])

• cv2.line()

• cv2.arrowLine()

参考链接

• cv2.rectangle()
• cv2.circle()
• cv2.putText()