Inception modules in convolutional networks were designed to allow for deeper and larger convolutional layers while at the same time allowing for more efficient computation. This is done by using 1×1 convolutions with small feature map size, for example, 192 28×28 sized feature maps can be reduced to 64 28×28 feature maps through 64 1×1 convolutions. Because of the reduced size, these 1×1 convolutions can be followed up with larger convolutions of size 3×3 and 5×5. In addition to 1×1 convolution, max pooling may also be used to reduce dimensionality.