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Figure 3
Filter visualizations of the three convolution layers. (a) The CNN for crystal-system classification, (b) for extinction-group classification and (c) for space-group classification. For each set of three, the top visualization shows 100 weights of 80 filters in the first convolution layer, the middle shows 50 × 80 weights of 80 filters in the second convolution layer and the bottom shows 25 × 80 weights of 80 filters in the third convolution layer. Red and blue represent different weights: a large positive value is represented by a strong red, whereas a large negative value is represented by a strong blue and white designates zero.

IUCrJ
Volume 4| Part 4| July 2017| Pages 486-494
ISSN: 2052-2525
https://doi.org/10.1107/S205225251700714X