How to convert Bounding Box coordinates to COCO format?
I need to convert the coordinates. I have this format: Horizontal and
Vertical coordinates of the top left and lower right of the element ((x1, y1) and (x2, y2)). And I need x_center y_center width height in this format. How can I do it?

The center and the size are simply
x_center = 0.5 * (x1 + x2)
y_center = 0.5 * (y1 + y2)
width = np.abs(x2 - x1)
height = np.abs(y2 - y1)

Note that by using np.abs when computing the width and height we do need to assume anything on the &quot;order&quot; of the first and second corners.
If you further want to normalize the center and size by the image size (img_w, img_h):
n_x_center = x_center / img_w
n_y_center = y_center / img_h
n_width = width / img_w
n_height = height / img_h

