The Performance Research of the Data Augmentation Method for Image Classification

Figure 7

Top butterfly image transformed by contrast parameters 0.7, 1.0, and 1.3. The histogram calculated by the sum of three-dimensional values of the image. The y axis is limited from 0 to 25000. The number of value 0 in image contrast 1.3 is cut out; the original number of value 0 is 181,688 compared to the contrast value 1.0 (natural one), i.e., 19,808.