Image resize and image resample are very similar to each other. However, there are differences between these two. For image resample, after a particular work has been completed on that image, the image resolution changes whereas it is not the case for image resize.

Learn more about Cropping:

Image Resample by Wikipedia

Basics of Image Resampling by entropymine

Resizing and Resampling Images by Serif

See also:

Image Dimensions

Image Size