Next: Color and pseudo-color images Up: Image Digitization Previous: Quantization
Also, the continuous two-dimensional image space need to be sampled by the digital image acquisition system to form a raster, a 2D array of pixels (picture-elements) in rows and columns. Same as in 1D case, the sampling theorem also applies her, with the only difference that the sampling is carried out in two spatial dimensions, instead of one temporal dimension.
If you are close to these images, you will see major difference between images of high and low resoluton. But if you are far away from the images (or if you squint your eyes), they no longer look very different, because their resolutions are reduced.