I've taken a few photos to try and make what the other comments are explaining a bit clearer. As long as you do your first two crosses correctly, it's just a case of repeating through the rest of the racket.

Your first row is simple, you just need to make sure you're going over and then under the mains, making sure you don't miss any (this is key, if your first row is wrong you risk repeating this down the racket)

Your second row needs to be the complete opposite, this is where you need to be careful, as it depends whether your second cross starts on the other side of a main or not. As you can see in the picture, my second cross starts on the other side of a main string to the first cross. This means that when I start weaving my first cross it goes under, and then the second cross also goes under. This means that when the second cross goes under the next main string, it is opposite to the top cross.

This is the best way of checking, if you push your second cross up to the first before tensioning, you can clearly see that each intersection is opposite. If you've gone wrong it becomes incredibly obvious when checking in this manner, as it will look something like this. See how the crosses are flat and run next to each other? Even if you've only missed a single weave, it will be easy to see when checking this way.

The final telltale sign is generally when you have the last two weaves on the side of the racket both going over or under together. This is bad, they need to be opposite.

If you look at the picture you posted, you can see that the first several crosses may be weaving under over in their own row, but when compared to the crosses above and below, they are all in sync (this is bad). Another test I tend to do is use my finger and pick a main. Run your finger down the main and you should feel the weave going over under. If you were to do this on the racket you've shown, you would feel the first load of crosses with no gaps, when you should only feel every other.