【opencv.js】经常使用的几种数据结构（Point、Scalar、Size、Circle、Rect、RotatedRect）

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Point 

// The first way
let point = new cv.Point(x, y);

// The second way
let point = {x: x, y: y};

 

Scalar

// The first way
let scalar = new cv.Scalar(R, G, B, Alpha);

// The second way
let scalar = [R, G, B, Alpha];

 

Size

// The first way
let size = new cv.Size(width, height);

// The second way
let size = {width : width, height : height};

 

Circle

// The first way
let circle = new cv.Circle(center, radius);

// The second way
let circle = {center : center, radius : radius};

 

Rect

// The first way
let rect = new cv.Rect(x, y, width, height);

// The second way
let rect = {x : x, y : y, width : width, height : height};

 

RotatedRect

// The first way
let rotatedRect = new cv.RotatedRect(center, size, angle);

// The second way
let rotatedRect = {center : center, size : size, angle : angle};

//获取 rotatedRect 四个点的位置信息
let vertices = cv.RotatedRect.points(rotatedRect);
let point1 = vertices[0];
let point2 = vertices[1];
let point3 = vertices[2];
let point4 = vertices[3];

//获取 rotatedRect 的最小包围矩阵
let boundingRect = cv.RotatedRect.boundingRect(rotatedRect);