New answers tagged rescaling
You don't strictly have to re-sample if you use an exact multiple (you could simply drop every other pixel) but it is silly not to re-sample as it results in a loss of overall quality and the production of artifacts if you don't. When you shrink an image, even at an exactly even multiple, the best image quality is maintained by combining the information ...
Yes. In Photoshop >CS Bicubic Sharper is recommended for downsampling.
Yes. Changing the size of the image without resampling is called "cropping" — the pixels in the new image are identical to the pixels in the old image, they just live in a differently-sized space. You want to map the old pixels into the new space, and that requires resampling whether the new space is larger or smaller than the old space. The reason why ...
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