Viewing a single comment thread. View all comments

eternal-abyss-77 OP t1_iwfx6f4 wrote

Ok I'll ask you exactly what i don't understand.

In equations 2 and 4 there is I which represents Identity matrix right?

So if let's say l = 2 and N = 7

Now will the shift matrix be like

[ 0 0 0 0 0 1 0 ]
[ 0 0 0 0 0 0 1 ]
[ 0 0 0 0 0 0 0 ]
[ 0 0 0 0 0 0 0 ]
[ 0 0 0 0 0 0 0 ]
[ 1 0 0 0 0 0 0 ]
[ 0 1 0 0 0 0 0 ]

If yes, then

[ I  -I ]
[-I   I ]

Should be of the form,

[ 1 0 0 0 0 -1 0 ]
[ 0 1 0 0 0 0 -1 ]
[ 0 0 0 0 0 0 0 ]
[ 0 0 0 0 0 0 0 ]
[ 0 0 0 0 0 0 0 ]
[ -1 0 0 0 0 1 0 ]
[ 0 -1 0 0 0 0 1 ]

Or

[ 1 0 0 0 0 -1 0 ]
[ 0 1 0 0 0 0 -1 ]
[ 0 0 1 0 0 0 0 ]
[ 0 0 0 1 0 0 0 ]
[ 0 0 0 0 1 0 0 ]
[ -1 0 0 0 0 1 0 ]
[ 0 -1 0 0 0 0 1 ]

?

Be it horizontal shift or vertical shift.

And what do they mean by rotations here : 0°, 45°, 90°, 135° ?

Because I'm extending this idea, so I am asking community help, perspectives, opinions and understandings, so I may not be wrongly understanding math.

−1

arhetorical t1_iwh7pz0 wrote

The identity matrix can be different sizes:

https://en.wikipedia.org/wiki/Identity_matrix

As for the rotations, it's in reference to the top of figure 3 and the position of the blue and red pixel.

2

eternal-abyss-77 OP t1_iwkd1u3 wrote

So how is rotation explained in the paper? Like which equations I should look into?

1

arhetorical t1_iwmwkn0 wrote

It's not, they're just explaining the positioning of the pixels in the figure.

2

eternal-abyss-77 OP t1_iwkd5k0 wrote

I would Like to show you my implementation of this paper, to how it acts on images.

So, I can ask you more on what exactly my issue is

1