Erosion in image

1. What is erosion of an image?
2. What is erosion and dilation in OpenCV?
3. Why do we require erosion and dilation?
4. What is an erosion filter?

What is erosion of an image?

Morphological Dilation and Erosion

Dilation adds pixels to the boundaries of objects in an image, while erosion removes pixels on object boundaries. The number of pixels added or removed from the objects in an image depends on the size and shape of the structuring element used to process the image.

What is erosion and dilation in OpenCV?

Erosion basically strips out the outermost layer of pixels in a structure, where as dilation adds an extra layer of pixels on a structure.

Why do we require erosion and dilation?

The most basic morphological operations are: Erosion and Dilation. They have a wide array of uses, i.e. : Removing noise. Isolation of individual elements and joining disparate elements in an image.

What is an erosion filter?

Filters input pixels relative to the size control, and is particularly useful with mattes. Negative values cause brighter areas to expand into darker areas and positive values cause darker areas to expand into lighter areas.