We propose a novel approach to synthesizing images that are effective for
training object detectors. Starting from a small set of real images, our
algorithm estimates the rendering parameters required to synthesize similar
images given a coarse 3D model of the target object. These parameters can then
be reused to generate an unlimited number of training images of the object of
interest in arbitrary 3D poses, which can then be used to increase
classification performances.
A key insight of our approach is that the synthetically generated images
should be similar to real images, not in terms of image quality, but rather in
terms of features used during the detector training. We show in the context of
drone, plane, and car detection that using such synthetically generated images
yields significantly better performances than simply perturbing real images or
even synthesizing images in such way that they look very realistic, as is often
done when only limited amounts of training data are available.

本文提出了一种基于 3D 模型合成无限数量的训练图像的方法，以提升目标检测的分类性能。通过估计渲染参数，生成的图像不仅要外观与真实图像相似，而且要在训练目标检测器时使用相同的特征。结果表明，与传统方法不同的是，此方法可显著提高无人机、飞机和汽车检测的性能。