Infrared is an effect many photo editing software programs offer that can be applied to digital images to simulate actual infrared film. Here's a peek at how it can alter your cemetery photos.
After "a little" infrared, fading back to original:
Infrared effect in full:
Which is different from black and white:
Full disclosure: I'm not a photographer. You probably already knew that by the amateur photos. Just thought I'd throw it out there so you would know to direct any technical questions to a real photographer. ;-)
[If you're wondering what's up with all the "letter" posts: I am attempting to follow the Blogging from A to Z Challenge (links to official page). This challenge lasts through the month of April, with Sundays off. Click here to see all my letter posts on one page (in reverse order). Oh, and wish me luck!]