Convert XYXY format (x,y top left and x,y bottom right) to XYWH format (x,y center point and width, height) and vice versa.

xyxy_xywh.py

import cv2
import numpy as np

def xyxy_to_xywh(xyxy):
    """
    Convert XYXY format (x,y top left and x,y bottom right) to XYWH format (x,y center point and width, height).
    :param xyxy: [X1, Y1, X2, Y2]
    :return: [X, Y, W, H]
    """
    if np.array(xyxy).ndim > 1 or len(xyxy) > 4:
        raise ValueError('xyxy format: [x1, y1, x2, y2]')
    x_temp = (xyxy[0] + xyxy[2]) / 2
    y_temp = (xyxy[1] + xyxy[3]) / 2
    w_temp = abs(xyxy[0] - xyxy[2])
    h_temp = abs(xyxy[1] - xyxy[3])
    return np.array([int(x_temp), int(y_temp), int(w_temp), int(h_temp)])


def xywh_to_xyxy(xywh):
    """
    Convert XYWH format (x,y center point and width, height) to XYXY format (x,y top left and x,y bottom right).
    :param xywh: [X, Y, W, H]
    :return: [X1, Y1, X2, Y2]
    """
    if np.array(xywh).ndim > 1 or len(xywh) > 4:
        raise ValueError('xywh format: [x1, y1, width, height]')
    x1 = xywh[0] - xywh[2] / 2
    y1 = xywh[1] - xywh[3] / 2
    x2 = xywh[0] + xywh[2] / 2
    y2 = xywh[1] + xywh[3] / 2
    return np.array([int(x1), int(y1), int(x2), int(y2)])