最简单的方法是Python/OpenCV是为了得到轮廓。然后循环每个轮廓并获取其边界框并将其绘制在图像上并打印。
Input:
import cv2
import numpy as np
# read image
img = cv2.imread('two_blobs.jpg')
# convert to grayscale
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
# threshold
thresh = cv2.threshold(gray,128,255,cv2.THRESH_BINARY)[1]
# get contours
result = img.copy()
contours = cv2.findContours(thresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
contours = contours[0] if len(contours) == 2 else contours[1]
for cntr in contours:
x,y,w,h = cv2.boundingRect(cntr)
cv2.rectangle(result, (x, y), (x+w, y+h), (0, 0, 255), 2)
print("x,y,w,h:",x,y,w,h)
# save resulting image
cv2.imwrite('two_blobs_result.jpg',result)
# show thresh and result
cv2.imshow("bounding_box", result)
cv2.waitKey(0)
cv2.destroyAllWindows()
边界框图像:
文字结果:
x,y,w,h: 262 267 37 45
x,y,w,h: 212 143 97 55