Whenever you reverse search an image, Google defines what is on the image and shows it on the search box.

Example: https://serpapi.com/playground?engine=google_reverse_image&image_url=https%3A%2F%2Fi.imgur.com%2FHBrB8p0.png

Please delete the coffee term on the Playground search box (it is automatically added there) search again with the image. You will see that Google fills the search box with what it assumes on the page, in this case, Danny Devito ❤️ (1)

This information no where in JSON except in the inline images' address url (2) which requires a little bit more effort to fetch.