Photo Stitching (or Image Stitching) is the process of combining multiple images that overlap fields of view to produce a high resolution panorama. Bit like what you get on a iPhone but usually better with a dslr.
The stitching component can be done by software like what canon has, within the camera itself , photoshop or hardware and software like Gigapan.
They are quite time consuming once you start getting a few shots together and have a degree of technicality.
There are several ways that the images can be taken and Im not about to discredit one way from another. I think what ever works for that photographer than great!
Up until recently my usual collection of images taken for a stitch is about 30. I have my tripod and “head” set up so that I can take images every x degrees. Since I updated my poor old Mac to Yosemite Ive managed to knock over +60 shots in a stitch which is really quite amazing considering the computer memory that goes into them. Yesterdays efforts saw just a smidgen under 1000 shots and about 18-20 gig of memory used.
Camera setup can vary on the situation as does when I use my gigapan, there are manual changes that I do throughout the shot also to correct for light.
One hint I will give. Prior to commencing a “stitch” take a shot of your hand, i.e. if you are shooting from left to right. Take a shot of our left hand and at the completion take a shot of your right hand. When it comes to processing a lot of images its handy when you are previewing them all together.
Here are a couple of shots that I have taken in the last week.
Images 1 and 3 are the same. I initially did the shot up for a 360 degree pano but didn’t really want my car in view so I cropped it out on No 3