双阶段目标检测器的原理与性能分析

双阶段检测器通常分为两步：第一步是在图像中找出候选区域，第二步是对候选区域进行分类识别和回归定位。由于有再次修正的机制，两阶段的精度相对更高，但是两个阶段的设计使得检测速度相对较慢。The two-stage detector is usually divided into two steps: the first step is to find candidate regions in the image, and the second step is to classify, recognize, and locate the candidate regions. Due to the mechanism of further correction, the accuracy of the two-stage detector is relatively higher. However, the design of the two stages results in a relatively slow detection speed.