Figure 3

The binary images used in the simulation. We assign the value \(1 ( 0 )\) to the white (black) pixel, which can be encoded by state \(( \vert 1 \rangle ) \vert 0 \rangle \). Additionally, the position of each pixel \(( x,y )\) also can be represented by basis encoding such as \(( 0,0 ) \rightarrow \vert 00 \rangle \). Lastly, the images in the database are numbered as \(0, 1, \ldots ,7\) from the first row and from left to right