Image search finds images mostly based on the text that is placed near the image on the webpage.
So, with your search engine, you'd put in keywords to describe an image, it would then look at the webpages' text to figure out, if the image on there might be relevant, then it would present the images that it has found, so that you can select the webpage that you want to go to based on the image which's surrounding text on the webpage suits your keywords.
That does sound like a cool concept for a search engine, but ultimately just the regular web search will do the same without the fuzziness of images added in between.
As a result, I don't know anyone who uses image search to find a webpage.
So, with your search engine, you'd put in keywords to describe an image, it would then look at the webpages' text to figure out, if the image on there might be relevant, then it would present the images that it has found, so that you can select the webpage that you want to go to based on the image which's surrounding text on the webpage suits your keywords.
That does sound like a cool concept for a search engine, but ultimately just the regular web search will do the same without the fuzziness of images added in between.
As a result, I don't know anyone who uses image search to find a webpage.