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[英]How to use opencv functions in C++ file and bind it with Python?
[英]OPENCV - Use svm file in python that was trainned in opencv c++ is possible?
我使用c ++ opencv训练了一个人脸识别系统。 我做了一些测试,识别在c ++代码中工作得非常好,所以我用这个训练保存了一个文件。 当我尝试在python上加载此文件时,预测始终为0.0。 我是python和numpy数组的新手。 下面我将用c ++(可行)编写代码,并在python中加载图像并应用预测。
C ++(工作得很好)
Mat face;
face = frame( faceRect );
// Convert to grayscale
cvtColor( face, face, COLOR_BGR2GRAY );
// Equalize hist
equalizeHist( face, face );
// Resize to 60x60
resize( face, face, samplesSize );
// Convert to CV_32FC1
face.convertTo( face, CV_32FC1 );
// Reshape to a row vector, 1x3600
face = face.reshape( 1, 1 );
// Make prediction
float prediction = svm.predict( face, true );
cout << "Predicao: " << prediction << endl;
蟒蛇:
def faceRecogntion( self, faceRoi):
# 1- Convert to grayscale
grayface = cv2.cvtColor(faceRoi, cv2.COLOR_BGR2GRAY)
# 2- Equalize hist
cv2.equalizeHist( grayface, grayface)
# 3 - Resize it to 60x60
dim = ( 60, 60)
grayface = cv2.resize(grayface, dim, interpolation = cv2.INTER_AREA)
print 'Image size: ' + str(grayface.shape)
# 4 - Convert to 32F
faceFloat = np.array(grayface, dtype=np.float32);
faceFloat = faceFloat.reshape( -1, 3600)
# 5- Apply prediction
result = self.svm.predict( faceFloat )
print result
cv2.waitKey(0)
return
谢谢 ;)
在C ++中,你在predict()
函数中将returnDFVal
设置为true
,在这种情况下,如果你的问题是2级分类,那么该方法返回与边距签名距离的决策函数值,你应该尝试修改predict:
faceFloat = np.float32(grayface).reshape(-1, 3600)
result = self.svm.predict(faceFloat, True)
ps:C ++中的face
是否包含与python中faceFloat
相同的元素(以相同的顺序)?
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