CV Add Cross For Free

All we have to do is manually select the image's area where we need to draw the cross. For this, we are going to use selectROI() function from OpenCV which will return the coordinates of the selected range of interest in the image Using those coordinates we can draw the cross and show the output.

All we have to do is manually select the image's area where we need to draw the cross. For this, we are going to use selectROI() function from OpenCV which will return the coordinates of the selected range of interest in the image Using those coordinates we can draw the cross and show the output.

How to draw an arrowed line on an image in OpenCV Python? img ? The input image on which the line is to be drawn. Start ? Start coordinate of the line in (width, height) format. End ? End coordinate of the line in (width, height) format. Color ? Color of the line. ... Thickness ? Thickness of the line in pixels.

The function cv::circle draws a simple or filled circle with a given center and radius. img. Image where the circle is drawn. center. Center of the circle.

To draw polylines on an image, we use the method cv2. polylines(). We can draw open or closed polylines on the image. The first and last points are not connected while drawing an open polyline.

The function cv2. hconcat() joins images horizontally and the function cv2. vconcat() joins images vertically. These functions join two or more images.

Draw geometric shapes on images using OpenCV line() : Used to draw line on an image. rectangle() : Used to draw rectangle on an image. circle() : Used to draw circle on an image. putText() : Used to write text on image.