How are scalar and scalar used in OpenCV?

class cv::Scalar_< _Tp > Template class for a 4-element vector derived from Vec. Being derived from Vec<_Tp, 4> , Scalar_ and Scalar can be used just as typical 4-element vectors. In addition, they can be converted to/from CvScalar. The type Scalar is widely used in OpenCV to pass pixel values.

How to create a cvscalar object in scalar?

CvColor is alias of CvScalar. Return value of index dimension. Set value of index dimension to value. Create new Scalar. Return new CvScalar if val is CvScalar or compatible object. Return values by Array. Return values by String. Create new Scalar.

How to convert a float to an int in OpenCV?

Concerning the initial question I confirm that in the OpenCV tutorial the variables a, b, c and d are all numpy-floats whereas in the added code the variables x and y are standard Python floats before they are converted to numpy-ints by np.int ().

Where do I find the doubles in OpenCV?

Therefore, to access the doubles for each channel you must access the positions on the vector. (documentation: http://docs.opencv.org/modules/core/doc/operations_on_arrays.html#sum) Thanks for contributing an answer to Stack Overflow!

How are scalar and scalar used in cvscalar?

class cv::Scalar_< _Tp > Template class for a 4-element vector derived from Vec. Being derived from Vec <_Tp, 4>, Scalar_ and Scalar can be used just as typical 4-element vectors. In addition, they can be converted to/from CvScalar.

How to get doubles on a scalar VEC?

The function cv::sum sums the elements from each channel separately, if the matrix has more than one channel, and stores them on the Scalar Vec. Therefore, to access the doubles for each channel you must access the positions on the vector.