1. A method comprising: capturing an image of a tissue microarray at a first magnification, the tissue microarray including a plurality of disks, each disk including a sample of a biological specimen; locating a first group of disks from the plurality of disks using one or more visual features of the first group of disks; identifying a grid defined by the first group of disks; locating a second group of disks from the plurality of disks using the identified grid to locate disks which do not include the one or more visual features of the first group of disks; capturing an image of each one of the first group of disks and the second group of disks at a second magnification; and storing the captured images.