最近某些项目需要用到人体姿势识别。当前有很多著名的人体识别的开源项目，比如CMU的OpenPose，上交的AlphaPose，效果都很好。我昨天试着安装一下AlphaPose，配环境配了一天，终于可以运行Demo的时候，显存溢出。。。因此我换个思路，我的项目不要求实时性，使用API也是可以接受的。发现百度的人体识别这方面的API还不错，QPS限制为2，也能用，于是便有了这篇文章。
本文通过调用百度开放的人体关键点检测API，实现关键点检测并将其在Python的轻量级GUI库Tkinter绘制出来。当然最直接的方法是直接用opencv显示出来，但是我们更多的时候需要进行交互，因此使用Tkinter。
一、百度API获取
若想使用百度的API，需要在百度AI的官网上注册帐号，然后在人体识别功能下创建一个应用，即可得到
APP_ID、API_KEY、SECRET_KEY，这样就可以调用它的API了。调用方式可以参考其API文档https://ai.baidu.com/ai-doc/BODY/0k3cpyxme
若想使用Python调用，首先要安装百度的API接口模块：
pip install baidu-aip
二、人体关键点获取和绘制
可以通过下面的类调用百度API
class BaiduAIP(object):
def __init__(self):
self.client = AipBodyAnalysis(cfg.APP_ID, cfg.API_KEY, cfg.SECRET_KEY)
def bodyAnalysis(self,img_jpg):
etval, buffer = cv2.imencode('.jpg', img_jpg)
result = self.client.bodyAnalysis(buffer) #内部把buffer转换为base64了
return result然后是绘制关键点和连线和方框的函数：
def draw_line(img,dic,text):
color=(0,255,0)
thickness=2
if(text=='warn'):
color=(0,0,255)
#nose ---> neck
cv2.line(img, (int(dic['nose']['x']),int(dic['nose']['y'])),(int(dic['neck']['x']),int(dic['neck']['y'])), color, thickness)
#neck --> left_shoulder
cv2.line(img, (int(dic['neck']['x']),int(dic['neck']['y'])),(int(dic['left_shoulder']['x']),int(dic['left_shoulder']['y'])), color, thickness)
#neck --> right_shoulder
cv2.line(img, (int(dic['neck']['x']),int(dic['neck']['y'])),(int(dic['right_shoulder']['x']),int(dic['right_shoulder']['y'])), color, thickness)
#left_shoulder --> left_elbow
cv2.line(img, (int(dic['left_shoulder']['x']),int(dic['left_shoulder']['y'])),(int(dic['left_elbow']['x']),int(dic['left_elbow']['y'])), color, thickness)
#left_elbow --> left_wrist
cv2.line(img, (int(dic['left_elbow']['x']),int(dic['left_elbow']['y'])),(int(dic['left_wrist']['x']),int(dic['left_wrist']['y'])), color, thickness)
#right_shoulder --> right_elbow
cv2.line(img, (int(dic['right_shoulder']['x']),int(dic['right_shoulder']['y'])),(int(dic['right_elbow']['x']),int(dic['right_elbow']['y'])), color, thickness)
#right_elbow --> right_wrist
cv2.line(img, (int(dic['right_elbow']['x']),int(dic['right_elbow']['y'])),(int(dic['right_wrist']['x']),int(dic['right_wrist']['y'])), color, thickness)
#neck --> left_hip
cv2.line(img, (int(dic['neck']['x']),int(dic['neck']['y'])),(int(dic['left_hip']['x']),int(dic['left_hip']['y'])), color, thickness)
#neck --> right_hip
cv2.line(img, (int(dic['neck']['x']),int(dic['neck']['y'])),(int(dic['right_hip']['x']),int(dic['right_hip']['y'])), color, thickness)
#left_hip --> left_knee
cv2.line(img, (int(dic['left_hip']['x']),int(dic['left_hip']['y'])),(int(dic['left_knee']['x']),int(dic['left_knee']['y'])), color, thickness)
#right_hip --> right_knee
cv2.line(img, (int(dic['right_hip']['x']),int(dic['right_hip']['y'])),(int(dic['right_knee']['x']),int(dic['right_knee']['y'])), color, thickness)
#left_knee --> left_ankle
cv2.line(img, (int(dic['left_knee']['x']),int(dic['left_knee']['y'])),(int(dic['left_ankle']['x']),int(dic['left_ankle']['y'])), color, thickness)
#right_knee --> right_ankle
cv2.line(img, (int(dic['right_knee']['x']),int(dic['right_knee']['y'])),(int(dic['right_ankle']['x']),int(dic['right_ankle']['y'])), color, thickness)
def draw_point(img,dic,text):
color=(0,255,0)
thickness=2
if(text=='warn'):
color=(0,0,255)
for i in dic:
cv2.circle(img,(int(dic[i]['x']),int(dic[i]['y'])),5,color,thickness)
def draw_box(img,dic,text):
color=(255,0,0)
if(text=='warn'):
color=(0,0,255)
left_top=(int(dic['left']),int(dic['top']))
left_bottom=(int(dic['left']),int(dic['top']+dic['height']))
right_bottom=(int(dic['left']+dic['width']),int(dic['top']+dic['height']))
right_top=(int(dic['left']+dic['width']),int(dic['top']))
cv2.line(img, left_top,left_bottom, color, 2)
cv2.line(img, left_top,right_top, color, 2)
cv2.line(img, right_bottom,left_bottom,color, 2)
cv2.line(img, right_bottom,right_top,color, 2)
cv2.putText(img, text, (int(dic['left']),int(dic['top'])+20), cv2.FONT_HERSHEY_COMPLEX, 1,color, 1)测试一下：
if __name__ == '__main__':
baiduapi = BaiduAIP()
img = cv2.imread('/media/chen/chen/Photo/others/littleCookies.jpg')
d=baiduapi.bodyAnalysis(img)
print("api time= "+str(t2-t1))
print(d["person_num"])
print(d["log_id"])
persion=d["person_info"]
for p in persion:
draw_line(img,p['body_parts'],'ok')
draw_point(img,p['body_parts'],'ok')
draw_box(img,p['location'],'beauty')
cv2.imwrite("image1.jpg",img)结果：
三、tkinter界面开发
先定义窗口和组件：
IMG_HEIGT=352*2
IMG_WIDTH=640*2
#根窗口
window = tk.Tk()
#显示变量
num_people = StringVar()
num_people.set('当前人数：0')
num_desertion = StringVar()
num_desertion.set('开小差：0')
#UI绘制
window.title("智能课堂管理")
sw = window.winfo_screenwidth()#获取屏幕宽
sh = window.winfo_screenheight()#获取屏幕高
#设置窗口大小和位置
wx = IMG_WIDTH+100
wh = IMG_HEIGT+100
window.geometry("%dx%d+%d+%d" %(wx,wh,(sw-wx)/2,(sh-wh)/2-100))#窗口至指定位置
#顶部是信息栏
fm1 = Frame(window)
Label(fm1, text="总人数：20").pack(side='left')
label_num = Label(fm1, textvariable=num_people).pack(side='left')
label_num = Label(fm1, textvariable=num_desertion).pack(side='left')
fm1.pack(side='top', padx=10)
#左侧是操作栏
fm2 = Frame(window)
fm2.pack(side='left', padx=10)
canvas1 = tk.Canvas(window,bg="#c4c2c2",height=IMG_HEIGT,width=IMG_WIDTH)#绘制画布
canvas1.pack(side="left")
job=ImgProcThread()
bt_start = tk.Button(fm2,text="启动",height=2,width=15,command=job.start).pack(side="top")
bt_pause = tk.Button(fm2,text="暂停",height=2,width=15,command=job.pause).pack(side="top")
bt_resume = tk.Button(fm2,text="恢复",height=2,width=15,command=job.resume).pack(side="top")
bt_stop = tk.Button(fm2,text="结束线程",height=2,width=15,command=job.stop).pack(side="top")
bt_quit = tk.Button(fm2,text="退出程序",height=2,width=15,command=window.quit).pack(side="top")
window.mainloop()ImgProcThread是什么？由于tkiner中没有提供直接播放视频的组件，因此我们使用cavas显示图片，并将关键点检测和图片检测放到另一个线程。但是由于Python自带的线程类功能功能不足，因此需要自己实现线程阻塞、结束等功能，如下：
class ImgProcThread(threading.Thread):
def __init__(self, *args, **kwargs):
super(ImgProcThread, self).__init__(*args, **kwargs)
self.__flag = threading.Event() # 用于暂停线程的标识
self.__flag.set() # 设置为True
self.__running = threading.Event() # 用于停止线程的标识
self.__running.set() # 将running设置为True
def run(self):
capture = cv2.VideoCapture('/media/chen/chen/Photo/others/1.mp4')
while self.__running.isSet() and capture.isOpened():
self.__flag.wait() # 为True时立即返回, 为False时阻塞直到内部的标识位为True后返回
pass
def pause(self):
self.__flag.clear() # 设置为False, 让线程阻塞
def resume(self):
self.__flag.set() # 设置为True, 让线程停止阻塞
def stop(self):
self.__flag.set() # 将线程从暂停状态恢复, 如何已经暂停的话
self.__running.clear() # 设置为Fals
四、总程序
本程序是根据我自己的需求来写的，因此会有一些在别人看起来蜜汁操作的代码，大家可以略过。
config.py
APP_ID="***"
API_KEY="***"
SECRET_KEY="***"
aip_bodyanalysis.py
from aip import AipBodyAnalysis
import sys
if('/opt/ros/kinetic/lib/python2.7/dist-packages' in sys.path):
sys.path.remove('/opt/ros/kinetic/lib/python2.7/dist-packages')
import cv2
import os
import config as cfg
import base64
import time
def pose_analyse(img,dic):
nose=(int(dic['nose']['x']),int(dic['nose']['y']))
neck=(int(dic['neck']['x']),int(dic['neck']['y']))
if(neck[1]<=nose[1]):
return 'warn'
return 'ok'
def draw_line(img,dic,text):
color=(0,255,0)
thickness=2
if(text=='warn'):
color=(0,0,255)
#nose ---> neck
cv2.line(img, (int(dic['nose']['x']),int(dic['nose']['y'])),(int(dic['neck']['x']),int(dic['neck']['y'])), color, thickness)
#neck --> left_shoulder
cv2.line(img, (int(dic['neck']['x']),int(dic['neck']['y'])),(int(dic['left_shoulder']['x']),int(dic['left_shoulder']['y'])), color, thickness)
#neck --> right_shoulder
cv2.line(img, (int(dic['neck']['x']),int(dic['neck']['y'])),(int(dic['right_shoulder']['x']),int(dic['right_shoulder']['y'])), color, thickness)
#left_shoulder --> left_elbow
cv2.line(img, (int(dic['left_shoulder']['x']),int(dic['left_shoulder']['y'])),(int(dic['left_elbow']['x']),int(dic['left_elbow']['y'])), color, thickness)
#left_elbow --> left_wrist
cv2.line(img, (int(dic['left_elbow']['x']),int(dic['left_elbow']['y'])),(int(dic['left_wrist']['x']),int(dic['left_wrist']['y'])), color, thickness)
#right_shoulder --> right_elbow
cv2.line(img, (int(dic['right_shoulder']['x']),int(dic['right_shoulder']['y'])),(int(dic['right_elbow']['x']),int(dic['right_elbow']['y'])), color, thickness)
#right_elbow --> right_wrist
cv2.line(img, (int(dic['right_elbow']['x']),int(dic['right_elbow']['y'])),(int(dic['right_wrist']['x']),int(dic['right_wrist']['y'])), color, thickness)
#neck --> left_hip
cv2.line(img, (int(dic['neck']['x']),int(dic['neck']['y'])),(int(dic['left_hip']['x']),int(dic['left_hip']['y'])), color, thickness)
#neck --> right_hip
cv2.line(img, (int(dic['neck']['x']),int(dic['neck']['y'])),(int(dic['right_hip']['x']),int(dic['right_hip']['y'])), color, thickness)
#left_hip --> left_knee
cv2.line(img, (int(dic['left_hip']['x']),int(dic['left_hip']['y'])),(int(dic['left_knee']['x']),int(dic['left_knee']['y'])), color, thickness)
#right_hip --> right_knee
cv2.line(img, (int(dic['right_hip']['x']),int(dic['right_hip']['y'])),(int(dic['right_knee']['x']),int(dic['right_knee']['y'])), color, thickness)
#left_knee --> left_ankle
cv2.line(img, (int(dic['left_knee']['x']),int(dic['left_knee']['y'])),(int(dic['left_ankle']['x']),int(dic['left_ankle']['y'])), color, thickness)
#right_knee --> right_ankle
cv2.line(img, (int(dic['right_knee']['x']),int(dic['right_knee']['y'])),(int(dic['right_ankle']['x']),int(dic['right_ankle']['y'])), color, thickness)
def draw_point(img,dic,text):
color=(0,255,0)
thickness=2
if(text=='warn'):
color=(0,0,255)
for i in dic:
cv2.circle(img,(int(dic[i]['x']),int(dic[i]['y'])),5,color,thickness)
def draw_box(img,dic,text):
color=(255,0,0)
if(text=='warn'):
color=(0,0,255)
left_top=(int(dic['left']),int(dic['top']))
left_bottom=(int(dic['left']),int(dic['top']+dic['height']))
right_bottom=(int(dic['left']+dic['width']),int(dic['top']+dic['height']))
right_top=(int(dic['left']+dic['width']),int(dic['top']))
cv2.line(img, left_top,left_bottom, color, 2)
cv2.line(img, left_top,right_top, color, 2)
cv2.line(img, right_bottom,left_bottom,color, 2)
cv2.line(img, right_bottom,right_top,color, 2)
cv2.putText(img, text, (int(dic['left']),int(dic['top'])+20), cv2.FONT_HERSHEY_COMPLEX, 1,color, 1)
class BaiduAIP(object):
def __init__(self):
self.client = AipBodyAnalysis(cfg.APP_ID, cfg.API_KEY, cfg.SECRET_KEY)
def bodyAnalysis(self,img_jpg):
etval, buffer = cv2.imencode('.jpg', img_jpg)
result = self.client.bodyAnalysis(buffer) #内部把buffer转换为base64了
return result
if __name__ == '__main__':
baiduapi = BaiduAIP()
img = cv2.imread('/media/chen/chen/Photo/others/littleCookies.jpg')
t1=time.time()
d=baiduapi.bodyAnalysis(img)
t2=time.time()
print("api time= "+str(t2-t1))
print(d["person_num"])
print(d["log_id"])
persion=d["person_info"]
for p in persion:
draw_line(img,p['body_parts'],'ok')
draw_point(img,p['body_parts'],'ok')
draw_box(img,p['location'],'beauty')
t3=time.time()
print("draw time= "+str(t3-t2))
cv2.imwrite("image1.jpg",img)
tkinter_body.py
import sys
if('/opt/ros/kinetic/lib/python2.7/dist-packages' in sys.path):
sys.path.remove('/opt/ros/kinetic/lib/python2.7/dist-packages')
import cv2
import tkinter as tk
from tkinter import *#文件控件
from PIL import Image, ImageTk#图像控件
import threading#多线程
from aip_bodyanalysis import *
import time
IMG_HEIGT=352*2
IMG_WIDTH=640*2
aip=BaiduAIP()
is_run=True
#申请线程锁
lock=threading.Lock()
#根窗口
window = tk.Tk()
#显示变量
num_people = StringVar()
num_people.set('当前人数：0')
num_desertion = StringVar()
num_desertion.set('不正常：0')
#UI绘制
window.title("测试")
sw = window.winfo_screenwidth()#获取屏幕宽
sh = window.winfo_screenheight()#获取屏幕高
#设置窗口大小和位置
wx = IMG_WIDTH+100
wh = IMG_HEIGT+100
window.geometry("%dx%d+%d+%d" %(wx,wh,(sw-wx)/2,(sh-wh)/2-100))#窗口至指定位置
#顶部是信息栏
fm1 = Frame(window)
Label(fm1, text="总人数：20").pack(side='left')
label_num = Label(fm1, textvariable=num_people).pack(side='left')
label_num = Label(fm1, textvariable=num_desertion).pack(side='left')
fm1.pack(side='top', padx=10)
#左侧是操作栏
fm2 = Frame(window)
fm2.pack(side='left', padx=10)
canvas1 = tk.Canvas(window,bg="#c4c2c2",height=IMG_HEIGT,width=IMG_WIDTH)#绘制画布
canvas1.pack(side="left")
def getResult(img):
d=aip.bodyAnalysis(img)
if("person_info" not in d):
return
persion=d["person_info"]
#获取人数
num=len(persion)
num_people.set( "当前人数："+str(num))
#绘制人体姿势
for p in persion:
status=pose_analyse(img,p['body_parts'])
draw_line(img,p['body_parts'],status)
draw_point(img,p['body_parts'],status)
draw_box(img,p['location'],status)
def cc():
capture = cv2.VideoCapture('/media/chen/chen/Photo/others/1.mp4')
#capture = cv2.VideoCapture(0)
while capture.isOpened():
t0=time.time()
_, frame = capture.read()
#清除缓存
for i in range(15):
_, frame = capture.read()
getResult(frame)
frame = cv2.flip(frame, 1)#翻转 0:上下颠倒 大于0水平颠倒
cv2image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGBA)
img = Image.fromarray(cv2image)
image_file=ImageTk.PhotoImage(img)
canvas1.create_image(0,0,anchor="nw",image=image_file)
print(time.time()-t0)
print("ending")
class ImgProcThread(threading.Thread):
def __init__(self, *args, **kwargs):
super(ImgProcThread, self).__init__(*args, **kwargs)
self.__flag = threading.Event() # 用于暂停线程的标识
self.__flag.set() # 设置为True
self.__running = threading.Event() # 用于停止线程的标识
self.__running.set() # 将running设置为True
def run(self):
capture = cv2.VideoCapture('/media/chen/chen/Photo/others/1.mp4')
while self.__running.isSet() and capture.isOpened():
self.__flag.wait() # 为True时立即返回, 为False时阻塞直到内部的标识位为True后返回
t0=time.time()
_, frame = capture.read()
for i in range(15):
_, frame = capture.read()
frame = cv2.resize(frame,(IMG_WIDTH,IMG_HEIGT), interpolation=cv2.INTER_NEAREST)
getResult(frame)
#frame = cv2.flip(frame, 1)#翻转 0:上下颠倒 大于0水平颠倒
cv2image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGBA)
img = Image.fromarray(cv2image)
image_file=ImageTk.PhotoImage(img)
canvas1.create_image(0,0,anchor="nw",image=image_file)
print(time.time()-t0)
def pause(self):
self.__flag.clear() # 设置为False, 让线程阻塞
def resume(self):
self.__flag.set() # 设置为True, 让线程停止阻塞
def stop(self):
self.__flag.set() # 将线程从暂停状态恢复, 如何已经暂停的话
self.__running.clear() # 设置为Fals
def video_demo():
t=threading.Thread(target=cc)
t.start()
job=ImgProcThread()
bt_start = tk.Button(fm2,text="启动",height=2,width=15,command=job.start).pack(side="top")
bt_pause = tk.Button(fm2,text="暂停",height=2,width=15,command=job.pause).pack(side="top")
bt_resume = tk.Button(fm2,text="恢复",height=2,width=15,command=job.resume).pack(side="top")
bt_stop = tk.Button(fm2,text="结束线程",height=2,width=15,command=job.stop).pack(side="top")
bt_quit = tk.Button(fm2,text="退出程序",height=2,width=15,command=window.quit).pack(side="top")
window.mainloop()
代码执行结果：
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