Correction to: Hum. Cent. Comput. Inf. Sci. (2019) 9:5 https://doi.org/10.1186/s13673-019-0167-8

In the original publication of this article [1], some labels in the left column are incorrect in Fig. 3. They are revised in the updated figure below:

Fig. 3
figure 3

Dimension reduction techniques for exploring the unlabelled sample pool consisting of all training images. For each row, the unlabelled pool is shown (left), the pool with true labels (middle), and the pool with inferred labels from 100 user-labelled samples (right). Results of labelling accuracy from the inferred scheme, and the accuracy achieved on the standard MNIST test dataset are given using Logistic Regression (LR) and Convolutional Neural Network (CNN)

The original publication of this article has been corrected.