Core and borehole images are acquired in various ways. During drilling, a cylindrical piece of core may be cut and retrieved. Sometimes, circumferential images are recorded from the outer cylindrical surface of the unslabbed core. The resolution of these images is in the range 0.1-1cm. These images should be treated as rotational invariant.
Seismic data provides an image of the acoustic impedance difference that occurs at rock interfaces.
If these rock interfaces are complex, interleaved, or deformed, this can be seen in the seismic image. The typical size of an image ranges from 250x250 pixels to 1000x2000 pixels for 2D images 200x200x250 to 2000x2000x1000 voxels for 3D images. The horizontal and vertical dimensions are different due to the seismic data- acquisition process.