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    • 0_1689836827323_d4969730256314ad81e738fd1f49186.png

      import sensor, image, time,math,pyb
      from pyb import UART,LED
      import json
      import ustruct
      import car
      from pid import PID
      LED_R = pyb.LED(1)
      LED_G = pyb.LED(2)
      LED_B = pyb.LED(3)
      LED_R.on()
      LED_G.on()
      LED_B.on()
      red_threshold_01 = ((0, 100, 127, 16, 127, -28));
      sensor.reset()
      sensor.set_pixformat(sensor.RGB565)
      sensor.set_framesize(sensor.QQVGA)
      sensor.skip_frames(10)
      sensor.set_auto_gain(False)
      sensor.set_auto_whitebal(False)
      clock = time.clock()
      uart=UART(3,115200)
      uart.init(115200,bits=8,parity=None,stop=1)
      green_threshold   = (0, 100, 35, 11, 67, -13)
      size_threshold = 2000
      x_pid = PID(p=0.5, i=1, imax=100)
      h_pid = PID(p=0.05, i=0.1, imax=50)
      
      K=510#the value should be measured
      
      
      		
      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
      def sending_data(cx,cy,cw,ch):
      	global uart;
      	data = bytearray([0x2C,4,cx,cy,0x5B])
      	uart.write(data);
      def receive_data():
      	global uart
      	if uart.any():
      		tmp_data=uart.readchar();
      		print(tmp_data)
      while(True):
      	clock.tick()
      	img = sensor.snapshot() 
      	blobs = img.find_blobs([red_threshold_01])
      	cx=0;cy=0;
      	if blobs:
      		max_blob = find_max(blobs)
      		x_error = max_blob[5]-img.width()/2
      		h_error = max_blob[2]*max_blob[3]-size_threshold
      		#print("x error: ", x_error)
      		img.draw_rectangle(max_blob[0:4])
      		img.draw_cross(max_blob[5], max_blob[6])
      		pixel_size=max_blob[4]
      		cx=max_blob[5];
      		cy=max_blob[6];
      		cw=max_blob[2];
      		ch=max_blob[3];
      		
      		focal_length=2.8
      		actual_size=3.4
              th =(actual_size*focal_length)/pixel_size
              x_output=x_pid.get_pid(x_error,1)
              h_output=h_pid.get_pid(h_error,1)
              #print("h_output",h_output)
              print("cx",cx,"cy",cy,"cz",th)
              sending_data(cx,cy,cw,ch);
              receive_data();
              car.run(-h_output-x_output,-h_output+x_output)
      	#else:
              #car.run(18,-18)
      


    • 你的代码文本和截图不匹配。



    • 会不会应该
      是b=blobs



    • @kidswong999 我改了一点,但是还是这个错误



    • @kidswong999

      LED_R = pyb.LED(1)
      LED_G = pyb.LED(2)
      LED_B = pyb.LED(3)
      LED_R.on()
      LED_G.on()
      LED_B.on()
      red_threshold_01 = ((2, 51, 11, 127, -128, 127));
      sensor.reset()
      sensor.set_pixformat(sensor.RGB565)
      sensor.set_framesize(sensor.QQVGA)
      sensor.skip_frames(10)
      sensor.set_auto_gain(False)
      sensor.set_auto_whitebal(False)
      clock = time.clock()
      uart=UART(3,115200)
      uart.init(115200,bits=8,parity=None,stop=1)
      green_threshold   = (0, 100, 35, 11, 67, -13)
      size_threshold = 2000
      x_pid = PID(p=0.5, i=1, imax=100)
      h_pid = PID(p=0.05, i=0.1, imax=50)
      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
      def sending_data(cx,cy,cw,ch):
      	global uart;
      	data = bytearray([0x2C,4,cx,cy,0x5B])
      	uart.write(data);
      def receive_data():
      	global uart
      	if uart.any():
      		tmp_data=uart.readchar();
      		print(tmp_data)
      while(True):
      	clock.tick()
      	img = sensor.snapshot()
      	blobs = img.find_blobs([red_threshold_01])
      	if len(blobs) == 1:
              # Draw a rect around the blob.
              b = blobs[0]
              img.draw_rectangle(b[0:4]) # rect
              img.draw_cross(b[5], b[6]) # cx, cy
              Lm = (b[2]+b[3])/2
              length = K/Lm
              print(length)
              #print(Lm)
      	cx=0;cy=0;
      	if blobs:
      		max_blob = find_max(blobs)
      		x_error = max_blob[5]-img.width()/2
      		h_error = max_blob[2]*max_blob[3]-size_threshold
      		print("x error: ", x_error)
      		img.draw_rectangle(max_blob[0:4])
      		img.draw_cross(max_blob[5], max_blob[6])
      		cx=max_blob[5];
      		cy=max_blob[6];
      		cw=max_blob[2];
      		ch=max_blob[3];
      		x_output=x_pid.get_pid(x_error,1)
      		h_output=h_pid.get_pid(h_error,1)
      		print("h_output",h_output)
      		sending_data(cx,cy,cw,ch);
      		sending_data(ch1.pulse_width_percent(int(abs(left_speed))))
      		sending_data(ch2.pulse_width_percent(int(abs(right_speed))))
      		receive_data();
      		car.run(-h_output-x_output,-h_output+x_output)
      	else:
      		car.run(18,-18)
      


    • @kidswong999 这是原来的代码



    • @x6hc 改了之后还是这个错误



    • 错误原因:tab和空格缩进混用。

      解决办法:把所有tab缩进改为4个空格。