About

PyTorch code for our paper:

Zhengyu Zhao, Zhuoran Liu, Martha Larson, "Towards Large yet Imperceptible Adversarial Image Perturbations with Perceptual Color Distance", CVPR 2020.

Specifically, we propose to strategically relax tight Lp-norm constraints while still maintaining imperceptibility by using perceptual color distance (CIEDE2000). The resulting large yet imperceptible perturbations lead to improved robustness and transferability.

Implementation

Overview

This code contains the implementations of:

1. A PyTorch's autograd-compitable differentiable solution of the conversion from RGB to CIELAB space and of CIEDE2000 metric,
2. Two approaches (PerC-C&W and PerC-AL) to creating imperceptible adversarial perturbations with optimization on perceptual color distance,
3. Evaluation on success rate, robustness and transferability on 1000 ImageNet-Compatible images.

Requirements

torch>=1.1.0; torchvision>=0.3.0; tqdm>=4.31.1; pillow>=5.4.1; matplotlib>=3.0.3; numpy>=1.16.4;

Download data

Run this official script to download the dataset.

Experiments

Code for all the experiments along with descriptions can be found in the Jupyter Notebook file main.ipynb. Detailed parameter settings for the proposed two approach are described in perc_cw.py and perc_al.py.

Examples