11. The system of claim 9 , wherein the processor configured for characterizing each pixel of a plurality of the pixels is further configured for: generating a plurality of features corresponding to each pixel of the plurality of pixels, wherein each feature of the plurality of features comprises a plurality of feature descriptor values and corresponds to a feature type from among a plurality of feature types; and the feature descriptor values of each feature of the plurality of features of each pixel of the plurality of pixels are determined based on data from the digital image.
11. The system of claim 9 , wherein the processor configured for characterizing each pixel of a plurality of the pixels is further configured for: generating a plurality of features corresponding to each pixel of the plurality of pixels, wherein each feature of the plurality of features comprises a plurality of feature descriptor values and corresponds to a feature type from among a plurality of feature types; and the feature descriptor values of each feature of the plurality of features of each pixel of the plurality of pixels are determined based on data from the digital image. 12. The system of claim 11 , wherein the processor configured for performing a first layer feature analysis is further configured for: determining each of the plurality of first layer confidence scores based on a first layer model from among a plurality of first layer models and the plurality of feature descriptor values of each feature of the plurality of features of each pixel of the plurality of pixels.