How to make Google index images properly?

Question

Google

There is an image gallery, which is implemented on the basis of bxslider.
The gallery itself is a grid of thumbnails, when you click on one of them, a large picture opens.
The code for each image looks something like this:

<div class="0"><a class="1" title="Описание при показе большой картинки" href="БОЛЬШАЯ КАРТИНКА.jpg"><div class="2"><div class="3"><p>Описание поверх миниатюры</p><div class="4"></div></div><img alt="Дублирование описания" src="МИНИАТЮРА.jpg"/></div></a></div>

In Google, only large pictures are indexed (as it should be), but the descriptions for each picture are substituted randomly, and taken by Google randomly from the descriptions for other pictures.
The question is how to make Google index the correct description for each picture?

Answer 1

the nature of this is in no way
- like snippets, it’s
easier to learn how to properly adapt to this
PS, especially since now is another sausage of the image algorithm