我正在使用Odroid和使用openCV python運行人臉檢測。但是相機有太多滯後。我嘗試了很多東西,但無法消除滯後。請建議我如何消除滯後。我想要從至少15英尺的高度檢測臉部,因爲我需要高分辨率圖像,但高分辨率圖像會導致更多滯後。目前我在兩幀之間有2秒的延遲。如果有建議請分享。在公開簡歷,蟒蛇我怎麼能消除相機滯後
import cv2, sys, numpy, os
import json
size = 3
fn_haar = 'haarcascade_frontalface_default.xml'
fn_haareye = 'haarcascade_eye.xml'
(im_width, im_height) = (112, 92)
haar_cascade = cv2.CascadeClassifier(fn_haar)
eye_cascade = cv2.CascadeClassifier(fn_haareye)
webcam = cv2.VideoCapture(0)
while True:
(rval, frame) = webcam.read()
frame=cv2.flip(frame,1,0)
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
mini = cv2.resize(gray, (gray.shape[1]/size, gray.shape[0]/size))
faces = haar_cascade.detectMultiScale(mini,scaleFactor=1.05, minNeighbors=3, minSize=(20, 20), flags = cv2.cv.CV_HAAR_SCALE_IMAGE)
for i in range(len(faces)):
face_i = faces[i]
(x, y, w, h) = [v * size for v in face_i]
face = gray[y:y + h, x:x + w]
face_resize = cv2.resize(face, (im_width, im_height))
eyes = eye_cascade.detectMultiScale(face)
for (ex,ey,ew,eh) in eyes:
cv2.rectangle(face_resize ,(ex,ey),(ex+ew,ey+eh),(0,255,0),2)
cv2.imshow('OpenCV', frame)
key = cv2.waitKey(10)
if key == 27:
break
在detectMultiScale函數中增加scaleFactor。如果你有選擇,然後嘗試選擇ROI,以儘量減少你必須做臉部檢測的區域 –
@ Optimus1072如果我增加比例因子,它能夠檢測15英尺的臉部嗎? –
scaleFactor = 1.2,圖像分辨率爲360 * 288,我可以在我的機器上(I5)每幀處理15ms。 –