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cv::Vec3f vs cv::Point3f

asked 2017-02-22 09:28:42 -0500

Nbb gravatar image

May sound like a stupid question. I have always wondered if there is an important difference between the two ?

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answered 2018-01-21 16:11:55 -0500

infoclogged gravatar image

The way you access thelements. cv::Vec3f is a vector of 3 float elements and hence belongs to the class Vector. You access each element by dereferencing the index.

Point3f is more intuitive, because you access the elements using a struct that is made of 3 floats. So the first element is accessed using point.x, the second is accessed using point.y and the third by point.z. The Point class also gives access to other coordinate related stuffs such as cross and dot product.

The class vector where in is primarily used to store and access data.

I am not sure, about the speed difference between the two. But as an end user, Point makes life pretty simple.

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answered 2018-01-20 07:23:41 -0500

updated 2018-01-20 07:44:20 -0500

you can refer the documentation to get the answer

typedef Vec<float, 3> cv::Vec3f

see Vec

typedef Point3_<float> cv::Point3f

see Point3_

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Asked: 2017-02-22 09:28:42 -0500

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Last updated: Jan 21 '18