我想使用鼠标滚轮更改此面部检测器的矩形大小:
import cv2
# Load the cascade
face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')
# Read the input image
img = cv2.imread('test.jpg')
# Convert into grayscale
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
# Detect faces
faces = face_cascade.detectMultiScale(gray, 1.1, 4)
# Draw rectangle around the faces
for (x, y, w, h) in faces:
cv2.rectangle(img, (x, y), (x+w, y+h), (255, 0, 0), 2)
# Display the output
cv2.imshow('img', img)
cv2.waitKey()
但是我不知道该怎么做
cv2.rectangle(img, (x, y), (x+w, y+h), (255, 0, 0), 2)
行进行更改以查看更多详细信息here,以检查函数的每个参数详细信息