FIGURE 4 in Automated segmentation of insect anatomy from micro-CT images using deep learning

FIGURE 4 Data augmentation. (a) Initial 2D image of a full head scan of an Atta texana ant specimen (original 1000 × 1000 px). Preprocessing is performed in two steps: (b) The image is cropped (original 520 × 520 px) around the brain area, keeping some of the muscles, nerves, and fibers that are close (or even attached) to the brain. The manual segmentation of the brain is indicated in blue. (c) Histogram equalization is used for additional augmentation, which enhances the contrast and projects the inner parts of the brain more clearly.