Slimming the shapes
We can achieve this effect using an operation called erosion. This is an operation that makes a shape thinner by peeling the boundary layers of all the shapes in the image:
Let's take a look at the function that performs morphological erosion:
Mat performErosion(Mat inputImage, int erosionElement, int erosionSize) { Mat outputImage; int erosionType; if(erosionElement == 0) erosionType = MORPH_RECT; else if(erosionElement == 1) erosionType = MORPH_CROSS; else if(erosionElement == 2) erosionType = MORPH_ELLIPSE; // Create the structuring element for erosion Mat element = getStructuringElement(erosionType, Size(2*erosionSize + 1, ...Get OpenCV By Example now with the O’Reilly learning platform.
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