opencv-python绘制矩形框

函数：
cv2.rectangle(img, pt1, pt2, color[, thickness[, lineType[, shift]]]) img：要画的圆所在的矩形或图像
pt1：矩形左上角的点
pt2：矩形右下角的点
color：线条颜色，如 (0, 0, 255) 红色，BGR
thickness：线条宽度
lineType：
8 (or omitted) ： 8-connected line
4：4-connected line
CV_AA - antialiased line
shift：坐标点小数点位数

import numpy as npimport cv2 as cv img = np.zeros((320, 320, 3), np.uint8) #生成一个空灰度图像print img.shape # 输出：(320, 320, 3)# 矩形左上角和右上角的坐标，绘制一个绿色矩形ptLeftTop = (60, 60)ptRightBottom = (260, 260)point_color = (0, 255, 0) # BGRthickness = 1 lineType = 4cv.rectangle(img, ptLeftTop, ptRightBottom, point_color, thickness, lineType)# 绘制一个红色矩形ptLeftTop = (120, 100)ptRightBottom = (200, 150)point_color = (0, 0, 255) # BGRthickness = 1lineType = 8cv.rectangle(img, ptLeftTop, ptRightBottom, point_color, thickness, lineType)cv.namedWindow("AlanWang")cv.imshow('AlanWang', img)cv.waitKey (10000) # 显示 10000 ms 即 10s 后消失cv.destroyAllWindows() 【opencv-python绘制矩形框】