1. 学习目标 学会使用 cv.putText 函数向图像添加文本;学会使用 cv.getTextSize 函数获取绘制文本占用的宽高等属性。 2. 绘制文本 cv.putText 函数说明 2.1 函数使用 cv.putText(img, text, pos, fontFace,fontScale,color[,...
"""Draw bounding boxes on image. Draw bounding boxes with class name and optional box score on image. Args: image: An `array` of shape (width, height, 3) with values in [0, 1]. boxes: An `array` of shape (num_boxes, 4) containing box corners as (y_min, x_min, y_max, x_...
》OpenCV应用很广,在对视频处理抽帧时可以通过调用opencv的VideoCapture、imgwrite 来提取实现 import cv2 vc = cv2.VideoCapture('SampleVideo_1280x720_1mb.mp4') # 读入视频文件 c=1 if vc.isOpened(): # 判断是否正常打开 rval, frame = vc.read() else: rval = False timeF = 5 # 视频帧计数间隔频...
img=cv2.imread('C:/Users/N/Desktop/monument.png') Now, to draw text on the image, we will make use of theputTextfunction. It receives the following parameters: Image that will be used to write the text. We will pass the image we have just read; ...
#reading the image on which the text is to be written using imread() function Imagewrite = cv2.imread('C:/Users/admin/Desktop/logo.png', cv2.IMREAD_UNCHANGED) #storing the position of the text on the image along the horizontal and vertical axes in a variable ...
out.write(frame)cv2.imshow('frame',frame)ifcv2.waitKey(1)&0xFF==ord('q'):breakelse:break# Release everythingifjob is finished cap.release()out.release()cv2.destroyAllWindows() . 三、opencv中的绘图函数 你将会学习到这些函数:cv2.line(), v2.circle(), cv2.rectangle(),cv2.ellipse(), ...
// Write imagesimwrite("lenaGray.jpg", gray); 第一个参数是我们要用所需的扩展格式保存图像的路径。 第二个参数是我们要保存的矩阵图像。 在我们的代码示例中,我们创建并存储图像的灰色版本,然后将其另存为.jpg文件。 我们加载的灰度图像将存储在第二个灰度变量中: ...
How to put a text in an image in OpenCV using C - In OpenCV, we can put some text in the image by using puttext() function. This function is defined in header. To put text in an image, we first need to declare the matrix which will load the image.Inste
cv.VideoWriter.write( image ) 将帧图像保存为视频文件。 isColor:如果为true,则视频为彩色,否则为灰度视频,默认为true 5,图像ROI ROI(Region of Interest)表示感兴趣区域。感兴趣区域,就是我们从图像中选择一个图像区域,这个区域就是图像分析所关注的焦点。我们圈定这个区域,那么我们要处理的图像就是要从一个大...
{std :: cout << "文件读取完毕: " << std :: endl;break;}// std :: cout << "图片高度: " << frame.rows << "图片宽度: " << frame.cols << std :: endl;// 将视频的帧转为灰度图cv :: cvtColor(frame, gray, cv :: COLOR_BGR2GRAY);// 将 gray 写入writer.write(frame);}...