1. A system using a computer-based device for estimating the three-dimensional antler or horn feature size of an animal, the system comprising: means for scaling at least one two-dimensional digital photographic image of the animal; means for measuring anatomical features of the photographed animal wherein the features are relevant to estimating the three-dimensional size of the antler or horn features of the animal; means for transforming the at least one two-dimensional digital photographic image of the animal into a three-dimensional image estimate of antler or horn feature size using three-dimensional first reference measurements of the measured anatomical features of the animal; means for calculating the estimated size of the antler or horn features of the animal; means for calculating a score of an antler or horn size of the animal and assigning a score to the animal; and means for presenting a visual or audible display, or a combination thereof, of data and estimated antler or horn feature size and calculated score of the animal for comparison to data, size, and score for other similar animals.