Cascade Convolutional Neural Network Based on Transfer-Learning for Aircraft Detection on High-Resolution Remote Sensing Images

Figure 4

Geometric features all of the sample aircraft. (a) Aspect ratio of each sample aircraft. They are approximately 1.0, and the range is (0.6, 1.6). The color in Figure 4(a) represents the value of the aspect ratio; the blue is the smallest value; the red is the largest value; and the middle is gradually transitions. (b) Size of each sample aircraft; the red is the width, and the green is the height. They are approximately 140 pixels, and the range is (50, 300).

(a)

(b)