I just learned an easy way to check and thought I'd pass it on to my blog buddies. This tip is from annkathryn, a poster at gardeweb.com.
Go to one of your blog photos, right click on it, and scroll down to the word "Properties" in the pop up box. Click on Properties to bring up the Element Properties box. Copy the address of the photo.
Now go to images.google.com and click on the camera icon in the search box. Paste the url of the photo there, and click the search button. Now you'll see websites with a copy of that photo.
Note: Sometimes there is an error message with the pasted url of the photo. If that happens, you'll have to save the image to your hard drive. Then when you click the camera ion at images.google.com, you need to then click "Upload an image" and load it from your computer.
Also, if the photo is really specific, like my painted bench, it will find the websites quickly, although it didn't find all of them that I know are saved on other sites. But if a picture is non-specific, like a sunset, or a multi-colored quilt, it will come up with many non-related items.