That's interesting!

I just used the Google powered Steemit search to search for roses, and it shows your post with your Pyrowings logo rather than the magnifying glass image which is showing in my feed, and which is the first image in this post, and what steemit uses in the steemit post lists.

When you drop a link to a steemit post into Facebook or Twitter, they each know where to find the picture to put next to the post, because Steemit tells them in meta data stored in the HTML head tag, which you can see if you "view page source" for any steemit post. Twitter uses twitter meta data, and for images is expects something like

meta name="twitter:image" content="https://i.imgsafe.org/a8080ea2cf.png"

where as Facebook uses open graph like

meta property="og:image" content="https://i.imgsafe.org/a8080ea2cf.png"

I'm not sure what Google is using to pick an image! I do know they cache the image on their server, so whatever they pick is likely to stick for awhile until they crawl steemit again.

Maybe the Google algorithm for picking an image returned nothing, since it may have crawled the post at the exact second it was posted and Steemit had not yet cached the images, which is something they do, at steemitimages.com. So Google found you as the author in other HTML tags in your post, and looked to see what other images they had for stored for you, and picked one of them. I doubt very much they accessed your computer in any way to grab the image from there.

Steemit just used the Google Search widget because that's an easy way to implement a search on a public website that Google will be crawling and indexing anyway. Eventually Steemit will implement their own search, probably allowing various ways to search, making it more flexible than the Google search, and that will get the image correct I am sure!

I don't think there is anything else you can do to prevent this glitch in the future. But I do expect a new Search from Steemit themselves and they will know to pick the first image in the post for the image in their lists.

Well you asked if anyone had any ideas, and I have had experience with getting images from posts and with using the Google Search widget and with coding my own custom search apps for social networks, so I thought I'd offer my ideas, which are just my opinion.

Beautiful Red Rose, by the way! I up voted it when I saw it earlier in the day. :-)