OPENCV WRITE TEXT ON IMAGE WINDOWS

Start and end coordinates, color of the shape, thickness of the border line are the common parameters in drawing a shape. In OpenCV, shapes such as a line, arrowed line, circle, rectangle, ellipse and polygons can be drawn over an image.

Out = cv2.VideoWriter('output.mp4', cv2.VideoWriter_fourcc(*'XVID’'), 20.0, (640,360))Ĭv2.destroyAllWindows() Draw Shapes in an Image

# create a write file - arguments: file_name, fourcc_code, fps, size # read a video and write it to another file Here, in the below example code, the file is saved in the working directory in the name of ‘output.mp4’. It is required that the right fourcc codec format, frame size and frame rate should be provided as arguments to enable proper saving of the video file. Write the video file to disk in any format you wish. Print(capture.get(cv2.CAP_PROP_FRAME_COUNT)) Print(capture.get(cv2.CAP_PROP_FRAME_HEIGHT)) Print(capture.get(cv2.CAP_PROP_FRAME_WIDTH)) The following codes enable us to learn the input video properties. Writing a video into a file needs some properties such as frame width, frame height and frame rate (fps). # read real-time video from device’s camera The following example shows camera capturing along with keyboard shortcut of letter ‘q’ to interrupt capturing. In that case, the user needs to enable keyboard shortcut to stop capturing. If we wish to read the device’s camera, the file name in the VideoCapture method should be replaced with number 0 (zero). Video plays until there is a frame to read in the file. This feature makes OpenCV the de facto choice for navigation systems such as robots and drones, embedded systems such as Raspberry Pi and Arduino, and autonomous vehicles. OpenCV reads a video either from a file or directly from the device’s camera. Excluding the specific properties such as frames per second and codec format, OpenCV processes videos the same way it processes images. # write the imageĬv2.imwrite('daria_gray.jpg', img) Read and Write a VideoĪ video is a collection of frames displaying at speed termed frames per second (fps). The method takes two arguments: name of image about to be written and the read/processed image.

Write an image to the local directory using the imwrite method. To read the above image as a grayscale image,

OPENCV WRITE TEXT ON IMAGE WINDOWS

destroyAllWindows method is used to force all the open windows to close at once. Therefore, when there comes a window into play, it must be named. It can be noted that the window has a name of its own. If 0 is provided as the argument, the user should close the window manually. This method takes time as an argument in milliseconds. The waitKey method is used to inform OpenCV the time duration over which a window can be kept open. OpenCV allows performing multiple inputs and outputs simultaneously through multiple windows. The read image can be displayed in a window using imshow method. Flag 0 refers to grayscale image reading. Deepmind Launches SOTA Video Generation Framework, ‘Transframer’ import cv2Īrgument 1 in the above imread method is a flag that directs that the image has to be read in colour.

Opencv write text on image