gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) # 二值化,取阈值为235 ret, thresh = cv2.threshold(gray, 235, 255, cv2.THRESH_BINARY) # 寻找图像中的轮廓 contours, hierarchy = cv2.findContours(thresh, 2, 1) cnt = contours[0] x,y,w,h = cv2.boundingRect(cnt) cv2.rectangle(img,(x,y...
_,contours,hierarchy=cv2.findContours(binary,cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE) draw_img0=cv2.drawContours(img.copy(),contours,0,(0,255,255),3) draw_img1=cv2.drawContours(img.copy(),contours,1,(255,0,255),3) draw_img2=cv2.drawContours(img.copy(),contours,2,(255,255,0),3) dr...
color_b = random.randint(100, 255)# draw box,颜色随机cv.rectangle(image, first_point, last_point, (color_r, color_g, color_b),2)#在图片上添加文字(cv.putText())text_value="TestData"font_size=3iffont_size <=1:cv.putText(img, text_value, (xmin, ymin+ 10), cv.FONT_HERSHEY_P...
draw_line1=cv2.line(img,(50,50),(400,400),(0,0,255),thickness=3)#绘制直线 draw_line2=cv2.line(img,(50,400),(400,50),(0,0,255),thickness=3) draw_rectangle=cv2.rectangle(img,(50,50),(400,400),(255,0,0),thickness=3)#绘制矩形 cv2.imshow('img',draw_line1)#此时的img和dr...
import cv2 as cv import numpy as np def draw_rectangle(): img = np.zeros((200,500,3),np.uint8) img[:] = 255 # 绘制默认1px边框的矩形 cv.rectangle(img,(10,10),(50,60),(0,0,255)) # 绘制10px边框的矩形 cv.rectangle(img,(110,10),(150,60),(0,0,255),10) # 绘制填充矩形...
cv2.rectangle(image, (x, y), (x+w, y+h), (255, 0, 0), 2) # 显示结果 cv2.imshow('Contours Analysis', image) cv2.waitKey(0) cv2.destroyAllWindows() 结论 图像轮廓检测在许多领域都有着广泛的应用,例如在医学图像分析、交通监控、人脸识别等领域。Python和OpenCV库提供了强大的工具集,用于实...
cv2.rectangle(img,(240,0),(480,375),(0,255,0),2)cv2.imshow("fff",img) 输出(750, 1200, 3)3 是指 3 通道,表示这个图片宽度是 1200 像素,高度是 750像素。 参考Accessing Image Properties 然后根据 stackoverflow 的图示https://stackoverflow.com/questions/23720875/how-to-draw-a-rectangle-aroun...
contourArea(approxs1) # 计算多边形逼近轮廓面积 print('多边形逼近,精度40像素', area1) area2 = cv2.contourArea(approxs2) print('多边形逼近,精度10像素', area2) rect1 = cv2.boundingRect(approxs1) # 直矩形(输出矩形左上点坐标和长宽) print('直矩形', rect1) cv2.rectangle(draw2, (rect1[0],...
cv2.rectangle函数在python中的功能如下:1. 绘制矩形:使用cv2.rectangle函数可以绘制一个矩形,通过指定矩形的左上角和右下角坐标,可以确定矩形的位置和大小。2. 设置...
cv2.rectangle是OpenCV库中用于绘制矩形的函数。它的用法如下:cv2.rectangle(img, pt1, pt2, color, thickness, lineType, sh...