It takes some time after site pages get into Search before their images start being indexed.
If images are still not appearing in Yandex.Images search:
- Check whether the site page with the images is shown 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 have texts related to the image, this image won't be indexed.
- Make sure that the robots.txt file allows indexing 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.