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  • 当直线是横向的时候线性回归就会乱 求解



    • 0_1563759822362_2ca0d890-c008-4f9f-b77d-ee43b1d820f0-image.png
      固件是最新的
      0_1563759890462_a2a787df-f16c-4b43-ad96-f2f89a2c5764-image.png

      import sensor, image, time
      from pyb import UART
      
      # 鲁棒线性回归例程
      # 可以跟踪所有指向相同的总方向但实际上没有连接的线。 在线路上使用
      # find_blobs(),以便更好地过滤选项和控制。
      
      
      from pid import PID
      rho_pid = PID(p=6.0, i=0.1, d=0.3)   #控制rol
      theta_pid = PID(p=2.5, i=0)#控制yaw
      
      finds_blob=0
      flymode=1
      
      
      THRESHOLD = (0, 100) # Grayscale threshold for dark things...
      
      BINARY_VISIBLE = True # 首先二值化
      
      up_roi   = (0,0, 80, 15)
      down_roi = (0, 55, 80, 15)
      left_roi = (0, 0, 25, 60)
      righ_roi = (55, 0,25, 40)
      
      y=0
      
      up_roif   = (0,0, 80, 30)
      down_roif = (0, 30, 80, 30)
      left_roif = (0, 0, 40, 60)
      righ_roif = (40, 0,40, 60)
      
      
      sensor.reset()
      sensor.set_pixformat(sensor.GRAYSCALE)
      #阈值内数据(白色像素)较多时,QQVGA帧率降到5以下。线较细时可以使用(7·19测试)
      #QQQVGA较稳定,帧率保持高速(50以上)
      sensor.set_framesize(sensor.QQQVGA) # 80x60 (4,800 pixels) - O(N^2) max = 2,3040,000.
      sensor.skip_frames(time = 2000)     # WARNING: If you use QQVGA it may take seconds
      clock = time.clock()                # to process a frame sometimes.
      sensor.set_vflip(True)
      sensor.set_hmirror(True)
      
      
      def find_border(img,area_roi):
          area=0
          singleline_check = img.get_regression([(255,255)],roi=area_roi, robust = True)
          if (singleline_check):
              area=1
          return area
      
      
      
      uart = UART(3,500000)#初始化串口 波特率 500000
      
      class Receive(object):
          uart_buf = []
          _data_len = 0
          _data_cnt = 0
          state = 0
      
      R=Receive()
      
      def UartSendData(Data):
          uart.write(Data)
      
      
      def DotDataPack(color,flag,x,y):
          print("found: x=",x,"  y=",y,          flymode)
          pack_data=bytearray([0xAA,0x29,0x05,0x41,0x00,color,flag,x>>8,x,(y)>>8,(y),0x00])
          lens = len(pack_data)#数据包大小
          pack_data[4] = 6;#有效数据个数
          i = 0
          sum = 0
          #和校验
          while i<(lens-1):
              sum = sum + pack_data[i]
              i = i+1
          pack_data[lens-1] = sum;
          return pack_data
      
      
      times=0
      def find_123(img):
          global times
          global flymode
          upflag=0
          leftflag=0
          rightflag=0
          downflag=0
          finds_blob=0
          upflag=find_border(img,up_roi)
          downflag=find_border(img,down_roi)
          leftflag=find_border(img,left_roi)
          rightflag=find_border(img,righ_roi)
      
          if upflag:
              finds_blob=finds_blob|0x01
      
          if downflag:
              finds_blob=finds_blob|0x02
      
          if leftflag:
              finds_blob=finds_blob|0x04
      
          if rightflag:
              finds_blob=finds_blob|0x08
      
          if flymode==1 :
              if finds_blob&0x01==0x00:
                  times+=1
              else :
                  times=0
              if times>10:
                  if finds_blob&0x04!=0x00:
                      flymode=3
                  elif finds_blob&0x08!=0x00:
                      flymode=4
          elif flymode==2 :
              if finds_blob&0x02==0x00:
                  times+=1
                  if times>15:
                      if finds_blob&0x04!=0x00:
                          flymode=3
                      elif finds_blob&0x08!=0x00:
                          flymode=4
              else :
                   times=0
          elif flymode==3 :
              if finds_blob&0x04==0x00:
                  times+=1
                  if times>15:
                      if finds_blob&0x01!=0x00:
                          flymode=1
                      elif finds_blob&0x02!=0x00:
                          flymode=2
              else :
                   times=0
          elif flymode==4 :
              if finds_blob&0x08==0x00:
                  times+=1
                  if times>15:
                      if finds_blob&0x01!=0x00:
                          flymode=1
                      elif finds_blob&0x02!=0x00:
                          flymode=2
              else :
                   times=0
      
      while(True):
          clock.tick()
          img = sensor.snapshot().binary([(0,100)]).lens_corr(strength = 1.8, zoom = 1.0)# if BINARY_VISIBLE else sensor.snapshot()
          #for i in [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30]:
              #img[i*160:i*160+80]=255
      
          #print(img[0])
          # 返回类似于由find_lines()和find_line_segments()返回的线对象。
          # 你有x1(),y1(),x2(),y2(),length(),
          # theta()(以度为单位的旋转),rho()和magnitude()。
          #
          # magnitude() 表示线性回归的工作情况。这对于鲁棒的线性回归意味着不同
          # 的东西。一般来说,值越大越好...
      
        #  for l in img.find_lines(roi=(30,20,20,20),threshold=1000)
          find_123(img)
          #print(flymode)
          if flymode==1 :
              roi=up_roif
          elif flymode==2 :
              roi=down_roif
          elif flymode==3 :
              roi=left_roif
          elif flymdoe==4 :
              roi=righ_roif
          line = img.get_regression([(255,255) if BINARY_VISIBLE else THRESHOLD],roi=roi,robust = True)
          #line = img.get_regression([(255,255) if BINARY_VISIBLE else THRESHOLD],robust = True)
      
          if (line):
              rho_err = abs(line.rho())-img.width()/2
              if line.theta()>90:
                  theta_err = line.theta()-180
              else:
                  theta_err = line.theta()
      
              if line.magnitude()>8:
                  #if -40<b_err<40 and -30<t_err<30:
                  rho_output = rho_pid.get_pid(rho_err,1)         #正值->右移  rol
                  theta_output = theta_pid.get_pid(theta_err,1)   #正值->右转  yaw
                  #if abs(theta_output)>80:
                      #y=0
                  #else :
                  #   y=200
                  if(flymode==1):
                      x=rho_output
                      y=100
      
                  elif(flymode==2):
                      x=rho_output
                      y=-100
      
                  elif(flymode==3):
                      x=-100
                      y=rho_output
      
                  elif(flymode==4):
                      x=100
                      y=rho_output
                  UartSendData(DotDataPack(0,1,int(x),int(y)))
                  #print("rho_output="+str(rho_output)+"    theta_output="+str(theta_output))
      
              img.draw_line(line.line(), color = 127,thickness=2)
          print("FPS %f, mag = %s" % (clock.fps(), str(line.magnitude()) if (line) else "N/A"))