Keep CALM and Improve Visual Feature Attribution

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Deep Learningcalm
Overview

Keep CALM and Improve Visual Feature Attribution

Jae Myung Kim1*, Junsuk Choe1*, Zeynep Akata2, Seong Joon Oh1†
* Equal contribution † Corresponding author

1 NAVER AI LAB 2 University of Tübingen

CAM vs CALM

Abstract

The class activation mapping, or CAM, has been the cornerstone of feature attribution methods for multiple vision tasks. Its simplicity and effectiveness have led to wide applications in the explanation of visual predictions and weakly-supervised localization tasks. However, CAM has its own shortcomings. The computation of attribution maps relies on ad-hoc calibration steps that are not part of the training computational graph, making it difficult for us to understand the real meaning of the attribution values. In this paper, we improve CAM by explicitly incorporating a latent variable encoding the location of the cue for recognition in the formulation, thereby subsuming the attribution map into the training computational graph. The resulting model, class activation latent mapping, or CALM, is trained with the expectation-maximization algorithm. Our experiments show that CALM identifies discriminative attributes for image classifiers more accurately than CAM and other visual attribution baselines. CALM also shows performance improvements over prior arts on the weakly-supervised object localization benchmarks.

Dataset downloading

For ImageNet and CUB datasets, please follow the common procedure for downloading the datasets.
For ImageNetV2, CUBV2, and OpenImages30k, please follow the procedure introduced in wsol-evaluation page.

How to use models

You can train CALM models by

$ python main.py --experiment_name=experiment_name/ \
                 --architecture=resnet50 \
                 --attribution_method=CALM_EM \
                 --dataset=CUB \
                 --use_bn=True --large_feature_map=True

You can evaluate the models on two different metrics,

$ python eval_pixel_perturb.py --experiment_name=experiment_name/ \
                               --architecture=resnet50 \ 
                               --attribution_method=CALM_EM \
                               --dataset=CUB \
                               --use_bn=True --large_feature_map=True \
                               --use_load_checkpoint=True \
                               --load_checkpoint=checkpoint_name/ \
                               --score_map_process=jointll --norm_type=clipping &
                               
$ python eval_cue_location.py --experiment_name=experiment_name/ \ 
                              --architecture=resnet50 \
                              --attribution_method=CALM_EM \
                              --dataset=CUB \
                              --use_bn=True --large_feature_map=True \
                              --use_load_checkpoint=True \
                              --load_checkpoint=checkpoint_name/ \
                              --score_map_process=jointll --norm_type=clipping --threshold_type=log &

Pretrained weights

For those who wish to use pretrained CALM weights,

Model name Dataset cls. accuracy weights
CALM_EM CUB 71.8 link
CALM_EM OpenImages 70.1 link
CALM_EM ImageNet 70.4 link
CALM_ML CUB 59.6 link
CALM_ML OpenImages 70.9 link
CALM_ML ImageNet 70.6 link

Explainability scores

Cue localization and Remove-and-classify results. More details about the metrics are in the paper.

Cue localization
(the higher, the better)		 Remove-and-classify
(the lower, the better)

License

Copyright (c) 2021-present NAVER Corp.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
Owner
NAVER AI
Official account of NAVER AI, Korea No.1 Industrial AI Research Group
NAVER AI
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