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Hi friends,

vector types also exist for 2-element and 4-element vectors (cv::Vec2b and cv::Vec4b) and for other element types. In this later case, the last letter is replaced by s for short, i for int, f for float, and d for double. All of these types are defined using the template class cv::Vec<t,n> where T is the type and N is the number of vector elements.

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.

Thus Scalar does not literally mean Vector.

Hope this helps you :)