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When an image is resized, its pixel information is changed. For example, an image is reduced in size, any unneeded pixel information will be discarded by the photo editor
When you resize an image and do not resample it, you change the image's size without changing the amount of data in that image. Resizing without resampling changes the image's physical size without changing the pixel dimensions in the image.
When you resize an image and do not resample it, you change the image's size without changing the amount of data in that image. Resizing without resampling changes the image's physical size without changing the pixel dimensions in the image.