Table 2. Comparison of SVM and softmax classifier with FC7 high-level features extracted by the CNN.

Method	Classification	Area grading	Density grading	Location grading
CNN	96.85%	90.29%	92.23%	88.35%
CNN_FC7 (Linear SVM)*	96.85%	90.29%	93.20%	89.32%
CNN_FC7 (RBF SVM)§	96.85%	90.29%	92.23%	90.29%
	log2c = -1; log2g = -8	log2c = -6; log2g = -10	log2c = -6; log2g = -8	log2c = -5; log2g = -8

Footnotes: CNN (convolutional neural network); SVM (support vector machine); CNN_FC7 (the seventh fully-connected layer features of CNN); RBF (radial basis function);

*(linear kernel function SVM classifier);

^§(RBF SVM classifier); c (cost parameter of RBF); g (gamma parameter of RBF).