从类型'CvSeq'到类型'CvPoint *的无效转换（如何在Opencv中进行类型转换）

Question

i get the error at line below

Vertex2 = (CvPoint*)Vertices[I]; //where vertices is cvseq of contour and Vertex2 is cvpoint

i get error invalid cast from type 'CvSeq' to type 'CvPoint*

how do i solve this

Answer 1

Are you just trying to get the address of the element in the array? in which case you would go

cvseq* Vertex2 = &Vertices[i];

A pointer called Vertex2 of type cvseq pointer whose value is the address of element i in the array Vertices.

UPDATE:

Just to help you know exactly what is wrong with your code.

'CvSeq' to type 'CvPoint*'

This is saying the you have a varaible of type CvPoint* (that would be your Vertex2) and you are trying to assign data of the type CvSeq.