OpenCV：利用python |
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OpenCV：利用python
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文章目录
1.绘制线段2.绘制矩形、圆形和椭圆3.绘制任意多边形4.文字图片绘制
1.绘制线段
cv2.line(img, pt1, pt2, color, thickness, lineType): -img: 目标图像 -pt1: 起点 -pt2: 终点 -color: 绘制的颜色 -thickness: 线段宽度 -lineType: 线段类型 import cv2 import numpy as np newImageInfo = (200,200,3) dat = np.zeros(newImageInfo, np.uint8) # 绘制线段 1.目标图像 2.begin 3.end 4.color cv2.line(dat, (0,0), (200, 200), (0,,255)) cv2.line(dat, (50, 100), (150, 100), (0,255,255), 20) cv2.imshow('dat', dat) cv2.waitKey(0)
cv2.rectangle(img, pt1, pt2, color,thickness,lineType) cv2.circle(img, center, radius, color,thickness,lineType cv2.ellipse(mg, center, axes, angle, startAngle, endAngle, color,thickness,lineType) cv2.ellipse? import cv2 import numpy as np newImageInfo = (200,200,3) dat = np.zeros(newImageInfo, np.uint8) # -1表示填充 cv2.rectangle(dat, (50,50), (150, 150), (0, 255, 0), -1) # 2.center 3 半径 4 color cv2.circle(dat, (100,100), (25), (0,0,255),2) # 1.图像 2 圆心 3 轴 4 角度 5 起始角度 6 终止角度 7 颜色 8宽度 cv2.ellipse(dat,(100,100), (50,25),0,0,360,(255,0,0),2) cv2.imshow('dat', dat) cv2.waitKey(0)
cv2.polylines(img, pts, isClosed, color,thickness,lineType) import cv2 import numpy as np newImageInfo = (200,200,3) dat = np.zeros(newImageInfo, np.uint8) points = np.array([[25,25], [50, 25], [25, 75], [150, 175], [100, 75]], np.int32) points = points.reshape((-1, 1, 2)) cv2.polylines(dat, [points], True, (0,255,255)) cv2.imshow('dat', dat) cv2.waitKey(0)
绘制文字 cv2.putText(img, text, org, fontFace, fontScale, color,thickness,lineType) import cv2 import numpy as np img = cv2.imread('img.jpg', 1) font = cv2.FONT_HERSHEY_SIMPLEX #2 text 3 坐标起点 4 字体类型 5 字体大小 6 颜色 7粗细 8 linetype cv2.putText(img,"this is flower",(100, 160), font, 1, (200,100,255),2,cv2.LINE_AA) cv2.imshow('img', img) cv2.waitKey(0)
绘制图片 import cv2 import numpy as np img = cv2.imread('img.jpg', 1) height = int(img.shape[0] * 0.3) width = int(img.shape[1] * 0.3) imgResize = cv2.resize(img, (width, height)) for i in range(height): for j in range(width): img[i + 125, j + 125] = imgResize[i, j] cv2.imshow('img', img) cv2.waitKey(0)
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