Its when somebody jumps into the background of what was supposed to be a nice picture, usually sporting a funny look on their face--thus ruining the photo :D. There are numerous other ways to photobomb a picture, pretty much, just do something ridiculous in the background.
Here's an example of a classic photobomb: http://photo-bombers.com/wp-content/uploads/2010/02/Photo-129.jpg
photobombing
We’ve all run into that absolute stone wall in our e-mail accounts, Facebook uploads, Wordpress embeds, and other file transfers where that picture just won’t fit. It’s way too big, the filesize has not yet been compressed in any meaningful fashion and the receiving server is getting REALLY cranky about it.How do you shrink a picture file with a free program?Irfanview or other free alternatives such as ACDSee Free (although Irfanview remains by and away the most popular choice) to the rescue! The advantage of using Irfanview is that it is extremely small and lightweight at only a few megs, runs a very spartan environment that is not prone to crashing or hangups, and can compress the heck out of those picture files without losing too much quality whatsoever.In fact, by conducting a sixty-second colour correction (almost always tweaking brightness down by 5-20 points, contrast up 5-20 points, and increasing colour saturation by the same margin) before you File -> Save As..., you will likely make that picture look even better. If you add a layer of sharpen, maybe so good as to impress at 1/10th the size.Cropping and resizing a photo to reduce filesizeThere are two steps to a quick and dirty resize job.Cropping is simply the method of cutting extraneous details or areas of a photograph which are non-essential. This means that your buddy photobombing you from off-camera-left while you’re trying to set up a nice little picture with your wife, or the big mess of clutter at the foot of your brand new sofa you’re trying to digitally brag about on Facebook. By using the crop tool to draw a rectangle (typically, though irregular cropping tools do exist) over the vital area of the picture and removing the rest, you’ve just trimmed a bunch of useless old data.Take that, boring bytes!Resizing is the meat of the matter and is so simple that you’ll never forget it. Through Irfanview, it is via Image -> Resize / Resample. Typically, I like to start at a 50% reduction and see if that’s just fine and dandy. If more is required, shrink it more. You still need to be able to see it, though!Finally, File -> Save As... is the command you will need to press a newly minted copy of your brand new pic, about 50-85% smaller in filesize. JPG offers great compression and total compatibility while those with a bit higher standards may opt for BMP or PNG.Whichever route you go, at least now you can show off all of the food you’ve been eating to your friends now, delivering important images one crop at a time.