It takes some time after site pages get into Search before their images start being indexed.
If your images have not appeared in Yandex.Images search after some time has elapsed:
- Check whether your site page that contains the images shows up in the main Search results.
- Make sure that the images have text descriptions or are published on pages with text content. If the page doesn't contain texts related to the image, the latter won't be indexed.
- Make sure that the robots.txt file allows robots to index the images. You can test this using the robots.txt analyzer.
- Also make sure that your images have a standard graphic format (
PNG). Images that open via a script are not indexed.