Different images for main and individual post pages?

Some time back I replaced the title of my blog from text to a custom images (using a link for an image I host on snap.as). I’ve included an image of what the code looks like. The image now appears centered toward the top of the page on my main/home page, and in the top left corner of my individual post pages. This has been working great, but I was wondering whether I can use a different/unique image for each the home page and for the individual pages (one image for the home page view and another image for the individual page view), and if so, what that code might look like. Hope my description made sense… Thanks!