"Draws a simple, thick, or filled up-right rectangle."
"image_ret"=cv_rectangle("image","start","end","colour","linetype","thickness")
"Input Image"
"Vertex of the rectangle"
"Vertex of the rectangle opposite to start"
" Rectangle color or brightness (grayscale image)"
"Type of the line: 8 (or omitted) - 8-connected line, 4 - 4-connected line and CV_AA - antialiased line."
"Line thickness"
"Returned Image"
"The function rectangle draws a rectangle outline or a filled rectangle whose two opposite corners are start and end"
"The function rectangle draws a rectangle outline or a filled rectangle whose two opposite corners are start and end"