使用官网的人脸追踪代码和官网的云台,为什么舵机两个舵机都只能转动一个方向?框选到人脸后为什么摄像头会弹开。
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使用官网的人脸追踪代码和官网的云台,为什么舵机两个舵机都只能转动一个方向?框选到人脸后为什么摄像头会弹开。请在这里粘贴代码
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import sensor, image, time from pid import PID from pyb import Servo pan_servo=Servo(1) tilt_servo=Servo(2) pan_servo.calibration(500,2500,500) tilt_servo.calibration(500,2500,500) red_threshold = (13, 49, 18, 61, 6, 47) pan_pid = PID(p=0.07, i=0, imax=90) #脱机运行或者禁用图像传输,使用这个PID tilt_pid = PID(p=0.05, i=0, imax=90) #脱机运行或者禁用图像传输,使用这个PID #pan_pid = PID(p=0.7, i=0, imax=90)#在线调试使用这个PID #tilt_pid = PID(p=0.5, i=0, imax=90)#在线调试使用这个PID sensor.reset() # Initialize the camera sensor. sensor.set_contrast(3) sensor.set_gainceiling(16) sensor.set_pixformat(sensor.RGB565) # use RGB565. sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed. sensor.set_vflip(True) sensor.skip_frames(10) # Let new settings take affect. sensor.set_auto_whitebal(False) # turn this off. clock = time.clock() # Tracks FPS. face_cascade = image.HaarCascade("frontalface", stages=25) def find_max(blobs): max_size=0 for blob in blobs: if blob[2]*blob[3] > max_size: max_blob=blob max_size = blob[2]*blob[3] return max_blob while(True): clock.tick() # Track elapsed milliseconds between snapshots(). img = sensor.snapshot() # Take a picture and return the image. blobs = img.find_features(face_cascade, threshold=0.75, scale=1.35) if blobs: max_blob = find_max(blobs) pan_error = max_blob[0]+max_blob[2]/2-img.width()/2 tilt_error = max_blob[1]+max_blob[3]/2-img.height()/2 print("pan_error: ", pan_error) img.draw_rectangle(max_blob) # rect img.draw_cross(int(max_blob[0]+max_blob[2]/2),int(max_blob[1]+max_blob[3]/2)) # cx, cy pan_output=pan_pid.get_pid(pan_error,1)/2 tilt_output=tilt_pid.get_pid(tilt_error,1) print("pan_output",pan_output) pan_servo.angle(pan_servo.angle()+pan_output) tilt_servo.angle(tilt_servo.angle()-tilt_output)
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我也是这样,感觉就是这官方的舵机控制上下那一个装反了
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我测试了一下,主要是识别率的问题。我更新了一下代码,https://github.com/SingTown/OpenMV-Pan-Tilt/blob/master/pan-tilt/src/find_face.py
另外,测试的话,我是在手机上显示人脸来测试的,这样识别率高一些。