R-CNN的全称是Region-CNN,它可以说是是第一个成功将深度学习应用到目标检测上的算法。传统的目标检测方法大多以图像识别为基础。 一般可以在图片上使用穷举法选出所所有物体可能出现的区域框,对这些区域框提取特征并使用图像识别方法分类, 得到所有分类成功的区域后,通过非极大值抑制(Non-maximumsuppression)输出结果。


As a variant of standard convolution, a dilated convolution can control effective receptive fields and handle large scale variance of objects without introducing additional computational costs. To fully explore the potential of dilated convolution, we proposed a new type of dilated convolution (referred to as inception convolution), where the convolution operations have independent dilation patterns among different axes, channels and layers. To develop a practical method for learning complex inception convolution based on the data, a simple but effective search algorithm, referred to as efficient dilation optimization (EDO), is developed. Based on statistical optimization, the EDO method operates in a low-cost manner and is extremely fast when it is applied on large scale datasets. Empirical results validate that our method achieves consistent performance gains for image recognition, object detection, instance segmentation, human detection, and human pose estimation. For instance, by simply replacing the 3x3 standard convolution in the ResNet-50 backbone with inception convolution, we significantly improve the AP of Faster R-CNN from 36.4% to 39.2% on MS COCO.