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  • 必看:玩转星瞳论坛了解一下图片上传,代码格式等问题。
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  • 如何对openmv颜色识别捕捉的色块进行模板匹配?



    • 
      import sensor, image, time
      from image import SEARCH_EX, SEARCH_DS
      
      thresholds = (57, 92, -65, -26, -4, 45)
      
      sensor.reset()
      sensor.set_contrast(1)
      sensor.set_gainceiling(16)
      sensor.set_pixformat(sensor.RGB565)
      sensor.set_framesize(sensor.QVGA)
      sensor.skip_frames(time = 2000)
      sensor.set_auto_gain(False) # must be turned off for color tracking
      sensor.set_auto_whitebal(False) # must be turned off for color tracking
      clock = time.clock()
      
      template1 = image.Image("/1.pgm")
      template2 = image.Image("/2.pgm")
      template3 = image.Image("/3.pgm")
      
      while(True):
          clock.tick()
          img = sensor.snapshot()
          for blob in img.find_blobs([thresholds], pixels_threshold=200, area_threshold=200, merge=True):
              img.draw_rectangle(blob.rect())
              img.draw_cross(blob.cx(), blob.cy())
              
              r1 = img.find_template(template1, 0.70, step=4, search=SEARCH_EX, roi = blob.rect())
              if r1:
                  img.draw_rectangle(r1)
                  
              r2 = img.find_template(template2, 0.70, step=4, search=SEARCH_EX, roi = blob.rect())
              if r2:
                  img.draw_rectangle(r2)
                  
              r3= img.find_template(template3, 0.70, step=4, search=SEARCH_EX, roi = blob.rect())
              if r3:
                  img.draw_rectangle(r3)
          print(clock.fps())
      
      
      
      

      请问要怎么改才能实现



    • find_blob可以返回坐标和区域,模板匹配用roi参数限制模板匹配的范围。



    • 我改了一下程序结果报错 OSError: Image format is not supported!
      是怎么回事

      import sensor, image, time
      from image import SEARCH_EX, SEARCH_DS
      
      thresholds = (57, 92, -65, -26, -4, 45)
      
      sensor.reset()
      sensor.set_contrast(1)
      sensor.set_gainceiling(16)
      sensor.set_pixformat(sensor.RGB565)
      sensor.set_framesize(sensor.QVGA)
      sensor.skip_frames(time = 2000)
      sensor.set_auto_gain(False) # must be turned off for color tracking
      sensor.set_auto_whitebal(False) # must be turned off for color tracking
      clock = time.clock()
      
      template1 = image.Image("/1.pgm")
      template2 = image.Image("/2.pgm")
      template3 = image.Image("/3.pgm")
      
      reset=0
      
      while(True):
          clock.tick()
          if reset==1:
              sensor.set_pixformat(sensor.RGB565)
              sensor.skip_frames(time = 2000)
              reset=0
      
          img = sensor.snapshot()
          blobs = img.find_blobs( [thresholds], pixels_threshold=200, area_threshold=200, merge=True)
        
          if blobs:
              print(blobs)
              sensor.set_pixformat(sensor.GRAYSCALE)
              sensor.skip_frames(time = 2000)
      
              for blob in blobs:
                  img.draw_rectangle(blob.rect())
                  img.draw_cross(blob.cx(), blob.cy())
      
                  r1 = img.find_template(template1, 0.70, step=4, search=SEARCH_EX, roi = blob.rect())
                  if r1:
                      img.draw_rectangle(r1)
      
                  r2 = img.find_template(template2, 0.70, step=4, search=SEARCH_EX, roi = blob.rect())
                  if r2:
                      img.draw_rectangle(r2)
      
                  r3= img.find_template(template3, 0.70, step=4, search=SEARCH_EX, roi = blob.rect())
                  if r3:
                      img.draw_rectangle(r3)
      
                  reset=1
          print(clock.fps())
      
      


    • blobs = img.find_blobs( [thresholds], pixels_threshold=200, area_threshold=200, merge=True)
       
      

      这一句,img是rgb565格式的彩图。

      if blobs:
              print(blobs)
              sensor.set_pixformat(sensor.GRAYSCALE)
              sensor.skip_frames(time = 2000)
      
              for blob in blobs:
                  img.draw_rectangle(blob.rect())
                  img.draw_cross(blob.cx(), blob.cy())
      

      这里,你虽然设置了Gragscale灰度图,但是你没有把图像赋值给img,即应该为:

       if blobs:
              print(blobs)
              img = sensor.set_pixformat(sensor.GRAYSCALE) #注意这一句
              sensor.skip_frames(time = 2000)
      
              for blob in blobs:
                  img.draw_rectangle(blob.rect())
                  img.draw_cross(blob.cx(), blob.cy())
      


    • 我改了一下结果报错AttributeError: 'bool' object has no attribute 'find_template'