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Hello,

for my Technician exam project i have to do a blobDetection with openCV in Python. I use the simpleBlobDetection algorithem. here a code sample

import cv2

b = cv2.SimpleBlobDetector()

#set parameter if GetValue('Blob_Detection.blob_color') == 0: b.setInt('blobColor',0) else: b.setInt('blobColor',255) b.setDouble('maxArea',GetValue('Blob_Detection.maxArea')) b.setDouble('maxCircularity',GetValue('Blob_Detection.maxCircularity')) b.setDouble('maxConvexity',GetValue('Blob_Detection.maxConvexity')) b.setDouble('maxInertiaRatio',GetValue('Blob_Detection.maxInertiaRatio')) b.setDouble('maxThreshold',GetValue('Blob_Detection.maxThreshold')) b.setDouble('minDistBetweenBlobs',GetValue('Blob_Detection.minDistbetweenBlobs')) b.setDouble('minRepeatability',GetValue('Blob_Detection.minRepeatability')) b.setDouble('minThreshold',GetValue('Blob_Detection.minThreshold')) b.setDouble('thresholdStep',GetValue('Blob_Detection.thresholdStep'))

blob = b.detect(img)

To set the parameters whitout 'blobColor' works fine. But if i try to set the blobColor i get a strange error message.

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cv2.error: ......\src\opencv\modules\core\src\algorithm.cpp:654: error: (-5) Argument error: the setter method was called for the parameter 'blobColor' of the algorithm 'Feature2D.SimpleBlob', the parameter has unsigned char type, so it should be set by i nteger, unsigned integer, uint64, unsigned char, boolean, float or double value, but the setter was called with integer value

Python exception in "Blob_Detection.execute" - error: ......\src\opencv\modules\core\src\algorithm.cpp:654: error: (-5) Argument error: the setter method was called for the parameter 'blobColor' of the algorithm 'Feature2D.SimpleBlob', the parameter has unsigned char type, so it should be set by integer, unsigned integer, uint64, unsigned char, boolean, float or double value, but the setter was called with integer value

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I tried different set methodes. But every time i get the same error. I don´t know where´s the mistake

Can someone help me???

Hello,

for my Technician exam project i have to do a blobDetection with openCV in Python. I use the simpleBlobDetection algorithem. here a code sample

import cv2
 
cv2

  b = cv2.SimpleBlobDetector()
 
cv2.SimpleBlobDetector()

  #set parameter
  if GetValue('Blob_Detection.blob_color') == 0:
    b.setInt('blobColor',0)
  else:
    b.setInt('blobColor',255)
  b.setDouble('maxArea',GetValue('Blob_Detection.maxArea'))
  b.setDouble('maxCircularity',GetValue('Blob_Detection.maxCircularity'))
  b.setDouble('maxConvexity',GetValue('Blob_Detection.maxConvexity'))
  b.setDouble('maxInertiaRatio',GetValue('Blob_Detection.maxInertiaRatio'))
  b.setDouble('maxThreshold',GetValue('Blob_Detection.maxThreshold'))
  b.setDouble('minDistBetweenBlobs',GetValue('Blob_Detection.minDistbetweenBlobs'))
  b.setDouble('minRepeatability',GetValue('Blob_Detection.minRepeatability'))
  b.setDouble('minThreshold',GetValue('Blob_Detection.minThreshold'))
  b.setDouble('thresholdStep',GetValue('Blob_Detection.thresholdStep'))
 
b.setDouble('thresholdStep',GetValue('Blob_Detection.thresholdStep'))

  blob = b.detect(img)b.detect(img)

cv2.error: ......\src\opencv\modules\core\src\algorithm.cpp:654: ..\..\..\src\opencv\modules\core\src\algorithm.cpp:654: error: (-5) Argument error: the setter method was called for the parameter 'blobColor' of the algorithm 'Feature2D.SimpleBlob', the parameter has unsigned char type, so it should be set by i
nteger, unsigned integer, uint64, unsigned char, boolean, float or double value, but the setter was called with integer value
 
value

Python exception in "Blob_Detection.execute" - error: ......\src\opencv\modules\core\src\algorithm.cpp:654: ..\..\..\src\opencv\modules\core\src\algorithm.cpp:654: error: (-5) Argument error: the setter method was called for the parameter 'blobColor' of the algorithm 'Feature2D.SimpleBlob', the parameter has unsigned char type, so it should be set by integer, unsigned integer, uint64, unsigned char, boolean, float or double value, but the setter was called with integer value
 
 
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 value