Difference between resampling & resizing

Hi

What is the difference between Image resampling & image resizing ?

Answer 1

[Jan]

There is not necessarily a difference between resizing and resampling of an image: Both can lead to the same results. imresize allows to apply different methods to create the resized image. But a resampling needs a specified method for the filtering also.

In theory you can resize an image by changing the resolution only, e.g. by setting the size of a pixel from 1/72mm to 1/96mm. But this does not reflect the operation of imresize. In opposite to this a resampling requires the creation or removing of pixels with an optional filtering.

Answer 2

[Azzi Abdelmalek]

1. resizing means changing a size of an image without changing the number of pixels
2. resampling means changing the number of pixels. this will affect the quality of your image

[Jan]

imresize does change the number of pixels.