O'Reilly logo

Learn OpenCV 4 by Building Projects - Second Edition by Prateek Joshi, Vinicius G. Mendonca, David Millan Escriva

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Thickening the shapes

We use an operation called dilation to achieve thickening. This is the operation that makes a shape thicker by adding boundary layers to all the shapes in the image:

Here is the code to do it:

Mat performDilation(Mat inputImage, int dilationElement, int dilationSize){    Mat outputImage;    int dilationType;    if(dilationElement == 0)        dilationType = MORPH_RECT;    else if(dilationElement == 1)        dilationType = MORPH_CROSS;    else if(dilationElement == 2)        dilationType = MORPH_ELLIPSE;    // Create the structuring element for dilation Mat element = getStructuringElement(dilationType, Size(2*dilationSize + 1, 2*dilationSize + 1), Point(dilationSize, ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required