我有一个来自 OpenCV 文档的关于模板匹配的代码,如下所示:
import cv2
import numpy as np
from matplotlib import pyplot as plt
img = cv2.imread('pathtomyimage',0)
img2 = img.copy()
template = cv2.imread('pathtomyTemplate',0)
w, h = template.shape[::-1]
# All the 6 methods for comparison in a list
methods = ['cv2.TM_CCOEFF', 'cv2.TM_CCOEFF_NORMED', 'cv2.TM_CCORR',
'cv2.TM_CCORR_NORMED', 'cv2.TM_SQDIFF', 'cv2.TM_SQDIFF_NORMED']
for meth in methods:
img = img2.copy()
method = eval(meth)
# Apply template Matching
res = cv2.matchTemplate(img,template,method)
min_val, max_val, min_loc, max_loc = cv2.minMaxLoc(res)
# If the method is TM_SQDIFF or TM_SQDIFF_NORMED, take minimum
if method in [cv2.TM_SQDIFF, cv2.TM_SQDIFF_NORMED]:
top_left = min_loc
else:
top_left = max_loc
bottom_right = (top_left[0] + w, top_left[1] + h)
cv2.rectangle(img,top_left, bottom_right, 255, 2)
plt.subplot(121),plt.imshow(res,cmap = 'gray')
plt.title('Matching Result'), plt.xticks([]), plt.yticks([])
plt.subplot(122),plt.imshow(img,cmap = 'gray')
plt.title('Detected Point'), plt.xticks([]), plt.yticks([])
plt.suptitle(meth)
plt.show()
现在我的图像上绘制的矩形没有填充,我想用一些图像填充 cv2.rectangle
的区域。如何实现这一目标?
答案 0 :(得分:0)
如果您使用模板图像填充矩形,那么模板的尺寸与矩形相同,您需要做的就是使用 Numpy 插入它。所以
img[top:bottom, left:right] = template
即把模板图片放入矩形定义的img区域。
当然,您可以使用任何图像代替模板,只要将其裁剪为与 left:right 和 top:bottom 定义的宽度和高度相同的图像即可。