Figure 4From: Unsupervised deep learning techniques for automatic detection of plant diseases: reducing the need of manual labelling of plant imagesClu-AE model: comparison between original and reconstructed images of two random leaves. For each channels, RGB, NIR, and NIR/R, the original channel is shown on the left and its reconstruction on the right. The first row refers to a healthy leaf, the second row to a diseased leafBack to article page