Question

You apply erosion to a monochrome image with a white background and black foreground. How will this affect the image?

A) Objects in the image will become larger as foreground pixels are added to their edges.

B) The image will remain exactly the same. Erosion has no effect unless combined with dilation

C) Objects in the image will become smaller as pixels are removed from their edges.

D) All of the white pixels will become black, and all of the black pixels will become white.

Answer 1

Answer: C) Objects in the image will become smaller as pixels are removed from their edges.

Explanation: Erosion is the process which is used in the field of morphological image processing .The functioning of the erosion is base on the elimination of the pixel from the boundaries or edges of the object.Thus, it makes the image smaller than actual image. .The other part of the processing is dilation which is addition of pixels to image.

Other given options are incorrect because erosion does not add pixels so image cannot become larger, cannot be of same size due to removal of pixel and no change in the color of pixel can happen.Thus, the correct option is option(C).