opencv中如何将图像覆盖到另一图像的特定部分

vr_overlay = "/Users/templates/vertical_overlay.png"show_image = "/Users/templates/image_3.png"vr_overlay_co = (0, 0, 100, 412)img_size = (0, 0, 440, 412)img = cv2.imread(show_image)img_rgb = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)v_overlay = cv2.imread(vr_overlay)resize_v_overlay = cv2.resize(v_overlay, (vr_overlay_co[2], vr_overlay_co[3]))plt.imshow(resize_v_overlay ,cmap='gray')plt.axis('off')plt.show()resize_img = cv2.resize(img_rgb, (img_size[2], img_size[3]))plt.imshow(resize_img ,cmap='gray')plt.axis('off')plt.show()resize_img[vr_overlay_co[1]: vr_overlay_co[1] +            vr_overlay_co[3],vr_overlay_co[0]: vr_overlay_co[0] +            vr_overlay_co[2]] = np.where(resize_v_overlay != [0, 0, 0],                                        resize_img[vr_overlay_co[1]: vr_overlay_co[1]                                                    + vr_overlay_co[3], vr_overlay_co[0]:                                                    vr_overlay_co[0] + vr_overlay_co[2],], resize_v_overlay)plt.imshow(resize_img ,cmap='gray')plt.axis('off')plt.show()

import cv2import numpy as np# read the imageimg = cv2.imread('people.png')hh, ww = img.shape[:2]# read the small gradientgrad = cv2.imread('small_gradient.png')hg, wg = grad.shape[:2]# create white image the size of the image# then insert gradient on right side while trimming off excess white from right side of gradientox = ww-wg+1grad2 = np.full_like(img, (255,255,255))grad2[0:hh, ox:ww-9+1] = grad[0:hg-1, 0:wg-9]# blend the img with grad2 via multiply#result = img.astype(np.float32) * grad2.astype(np.float32) / 255#result = result.clip(0,255).astype(np.uint8)#orscale = 1/255result = cv2.multiply(img, grad2, scale=scale)# save resultscv2.imwrite('people_gradient.png', result)# show resultscv2.imshow('result', result)cv2.waitKey(0)