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Significant features to emotions.
| Emotion | Features |
|---|---|
| Angry | Circularity |
| Disgust | Length of line segments |
| Fear | Orientation of line segments and angle count |
| Sadness | Fitness, mass of curves, circularity, and orientation of line segments |
| Amusement | Mass of curves and orientation of line segments |
| Awe | Orientation of line segments |
| Excitement | Orientation of line segments |
| Contentment | Mass of lines, angle count, and orientation of line segments |
