Figure 8
The image shows five confusion matrix heatmaps arranged in two rows. Each heatmap has the horizontal axis labeled “Predicted label”, with class labels 0, 1, 2, and 3 from left to right, and the vertical axis labeled “Truth label”, with class labels 0, 1, 2, and 3 from top to bottom. Each matrix contains numerical values inside shaded squares and a vertical color scale bar on the right. The first heatmap, labeled “(a)”, shows the following matrix data. The vertical scale bar shows the lightest blue as 60 and the darkest blue as 120. The table contains four rows and four columns. The row-wise entries in the table are as follows: Row 1: Truth label: 0; Predicted label 0: 138; Predicted label 1: 87; Predicted label 2: 98; Predicted label 3: 57. Row 2: Truth label: 1; Predicted label 0: 67; Predicted label 1: 114; Predicted label 2: 83; Predicted label 3: 116. Row 3: Truth label: 2; Predicted label 0: 126; Predicted label 1: 81; Predicted label 2: 93; Predicted label 3: 80. Row 4: Truth label: 3; Predicted label 0: 71; Predicted label 1: 116; Predicted label 2: 87; Predicted label 3: 106. The second heatmap, labeled “(b)”, shows the following matrix data. The vertical scale bar shows the lightest blue as 50 and the darkest blue as 200. The table contains four rows and four columns. The row-wise entries in the table are as follows: Row 1: Truth label: 0; Predicted label 0: 203; Predicted label 1: 26; Predicted label 2: 138; Predicted label 3: 13. Row 2: Truth label: 1; Predicted label 0: 24; Predicted label 1: 163; Predicted label 2: 48; Predicted label 3: 145. Row 3: Truth label: 2; Predicted label 0: 136; Predicted label 1: 46; Predicted label 2: 146; Predicted label 3: 52. Row 4: Truth label: 3; Predicted label 0: 18; Predicted label 1: 147; Predicted label 2: 48; Predicted label 3: 167. The third heatmap, labeled “(c)”, shows the following matrix data. The vertical scale bar shows the lightest blue as 0 and the darkest blue as 300. The table contains four rows and four columns. The row-wise entries in the table are as follows: Row 1: Truth label: 0; Predicted label 0: 367; Predicted label 1: 0; Predicted label 2: 13; Predicted label 3: 0. Row 2: Truth label: 1; Predicted label 0: 9; Predicted label 1: 179; Predicted label 2: 6; Predicted label 3: 186. Row 3: Truth label: 2; Predicted label 0: 137; Predicted label 1: 3; Predicted label 2: 233; Predicted label 3: 7. Row 4: Truth label: 3; Predicted label 0: 4; Predicted label 1: 124; Predicted label 2: 7; Predicted label 3: 245. The fourth heatmap, labeled “(d)”, shows the following matrix data. The vertical scale bar shows the lightest blue as 0 and the darkest blue as 300. The table contains four rows and four columns. The row-wise entries in the table are as follows: Row 1: Truth label: 0; Predicted label 0: 354; Predicted label 1: 0; Predicted label 2: 26; Predicted label 3: 0. Row 2: Truth label: 1; Predicted label 0: 4; Predicted label 1: 277; Predicted label 2: 5; Predicted label 3: 94. Row 3: Truth label: 2; Predicted label 0: 49; Predicted label 1: 4; Predicted label 2: 321; Predicted label 3: 6. Row 4: Truth label: 3; Predicted label 0: 2; Predicted label 1: 144; Predicted label 2: 14; Predicted label 3: 220. The fifth heatmap, labeled “(e)”, shows the following matrix data. The vertical scale bar shows the lightest blue as 0 and the darkest blue as 300. The table contains four rows and four columns. The row-wise entries in the table are as follows: Row 1: Truth label: 0; Predicted label 0: 369; Predicted label 1: 0; Predicted label 2: 11; Predicted label 3: 0. Row 2: Truth label: 1; Predicted label 0: 0; Predicted label 1: 293; Predicted label 2: 1; Predicted label 3: 86. Row 3: Truth label: 2; Predicted label 0: 12; Predicted label 1: 1; Predicted label 2: 366; Predicted label 3: 1. Row 4: Truth label: 3; Predicted label 0: 0; Predicted label 1: 59; Predicted label 2: 1; Predicted label 3: 320.Confusion matrices of different methods: (a) SVM, (b) CNN, (c) MSRN, (d) IDAN and (e) DMSRN. Source(s): Created by authors