Approach,      Core Network,            Tail Network,         File, Accuracy
Multi-Input,   3 Conv2D/MaxPooling CNN, Dense(1024/512/256),  101,  65%
Multi-Input,   MobileNet,   ...,        107,
Multi-Channel, 3 Conv2D/MaxPolling CNN, ...,                  201,  22%
Multi-Channel, MobileNet,               GAP(0124)/Dense(256), 307,  100%
Multi-Channel, MobileNetV2,             GAP(1024)/Dense(256), 308, 2-->96%/10-->22%