Object: to come up with another way of manipulating my face pic that produces an interesting output.
My idea: to add some dark grid lines on it.
My original face image is shown as follows:
Let's see the magic!
Method: generate a core matrix, which can showed as below.
Use this core matrix to manipulate our pic from left to right, up to down. Simply multiply each correspoding pixel from both pic and core matrix. And then we will get our expected output with equidistant grid.