Image registration is an image processing technique used to align multiple scenes into a single integrated image. It helps overcome issues such as image rotation, scale, and skew that are common when overlaying images.
Image registration is often used in medical and satellite imagery to align images from different camera sources. Digital cameras use image registration to align and connect adjacent images into a single panoramic image.
For more details, see Image Processing Toolbox.
See also: image analysis, edge detection, color profile, image thresholding, image enhancement, image reconstruction, image segmentation, image transform, digital image processing, image and video processing, Steve on Image Processing (blog)