Glossary

Resampling

Written by Digicamhelp Editor

Resampling brings back detail when an image is resized, as long as it’s not overdone. When an image is reduced in size, information is actually deleted from the image. Information is added when an image is increased in size.

ResamplingWhen a digital image is enlarged or reduced, its pixel dimensions are changed. The image needs to be resampled to bring out detail.

Photo editing programs resample images automatically. Some programs provide the option to turn it off or choose the type of resampling.

When resampling an image that has been reduced in size, the number of pixels decreases. Pixel information is actually deleted from the image.

When enlarging an image, the number of pixels is increased. New pixel information is added based on matching color values of existing pixels within the image.

As a general rule, don’t resize images more than once or, in the case of an image reduced in size, twice. Resampling too much causes images to lose sharpness and detail.

Original image

Original image

Reduced image

Reduced image

Image after resampling

Image after resampling