Search Results for author: Hwee Kuan Lee

Found 24 papers, 6 papers with code

Use of small auxiliary networks and scarce data to improve the adversarial robustness of deep learning models

no code implementations29 Sep 2021 Davide Coppola, Hwee Kuan Lee, Cuntai Guan

Experiments on the CIFAR10 dataset showed that using only $10\%$ of the full training set, the proposed method was able to adequately defend the model against the AutoPGD attack while maintaining a classification accuracy on clean images outperforming the model with adversarial training by $7\%$.

Adversarial Robustness Image Classification

Explaining Adversarial Vulnerability with a Data Sparsity Hypothesis

1 code implementation1 Mar 2021 Mahsa Paknezhad, Cuong Phuc Ngo, Amadeus Aristo Winarto, Alistair Cheong, Chuen Yang Beh, Jiayang Wu, Hwee Kuan Lee

We found that models trained using our framework, as well as other regularization methods and adversarial training support our hypothesis of data sparsity and that models trained with these methods learn to have decision boundaries more similar to the aforementioned ideal decision boundary.

Adversarial Robustness

Automated Deep Learning Analysis of Angiography Video Sequences for Coronary Artery Disease

no code implementations29 Jan 2021 Chengyang Zhou, Thao Vy Dinh, Heyi Kong, Jonathan Yap, Khung Keong Yeo, Hwee Kuan Lee, Kaicheng Liang

The evaluation of obstructions (stenosis) in coronary arteries is currently done by a physician's visual assessment of coronary angiography video sequences.

Studying The Effect of MIL Pooling Filters on MIL Tasks

no code implementations2 Jun 2020 Mustafa Umit Oner, Jared Marc Song Kye-Jet, Hwee Kuan Lee, Wing-Kin Sung

In this paper, we study the effect of different MIL pooling filters on the performance of MIL models in real world MIL tasks.

Attribute Multiple Instance Learning

Enhancing Transformation-Based Defenses Against Adversarial Attacks with a Distribution Classifier

no code implementations ICLR 2020 Connie Kou, Hwee Kuan Lee, Ee-Chien Chang, Teck Khim Ng

Furthermore, on the adversarial counterparts, with the image transformation, the resulting shapes of the distribution of softmax are similar to the distributions from the clean images.

Adversarial Attack

Confusing and Detecting ML Adversarial Attacks with Injected Attractors

no code implementations5 Mar 2020 Jiyi Zhang, Ee-Chien Chang, Hwee Kuan Lee

Many machine learning adversarial attacks find adversarial samples of a victim model ${\mathcal M}$ by following the gradient of some attack objective functions, either explicitly or implicitly.

Machine-Learning Studies on Spin Models

no code implementations12 Jan 2020 Kenta Shiina, Hiroyuki Mori, Yutaka Okabe, Hwee Kuan Lee

As an alternative to investigating the thermal average of macroscopic physical quantities, they have used the spin configurations for the classification of the disordered and ordered phases of a phase transition through machine learning.

Statistical Mechanics

Cribriform pattern detection in prostate histopathological images using deep learning models

no code implementations9 Oct 2019 Malay Singh, Emarene Mationg Kalaw, Wang Jie, Mundher Al-Shabi, Chin Fong Wong, Danilo Medina Giron, Kian-Tai Chong, Maxine Tan, Zeng Zeng, Hwee Kuan Lee

In this paper, we present an annotated cribriform dataset along with analysis of deep learning models and hand-crafted features for cribriform pattern detection in prostate histopathological images.

Classification General Classification +1

Weakly Supervised Clustering by Exploiting Unique Class Count

1 code implementation ICLR 2020 Mustafa Umit Oner, Hwee Kuan Lee, Wing-Kin Sung

We have constructed a neural network based $ucc$ classifier and experimentally shown that the clustering performance of our framework with our weakly supervised $ucc$ classifier is comparable to that of fully supervised learning models where labels for all instances are known.

Clustering Multiple Instance Learning +3

Enhancing Transformation-based Defenses using a Distribution Classifier

no code implementations1 Jun 2019 Connie Kou, Hwee Kuan Lee, Ee-Chien Chang, Teck Khim Ng

Furthermore, on the adversarial counterparts, with the image transformation, the resulting shapes of the distribution of softmax are similar to the distributions from the clean images.

Adversarial Attack

Fence GAN: Towards Better Anomaly Detection

1 code implementation2 Apr 2019 Cuong Phuc Ngo, Amadeus Aristo Winarto, Connie Kou Khor Li, Sojeong Park, Farhan Akram, Hwee Kuan Lee

However, the traditional GAN loss is not directly aligned with the anomaly detection objective: it encourages the distribution of the generated samples to overlap with the real data and so the resulting discriminator has been found to be ineffective as an anomaly detector.

Anomaly Classification Anomaly Detection +1

Gated-Dilated Networks for Lung Nodule Classification in CT scans

no code implementations1 Jan 2019 Mundher Al-Shabi, Hwee Kuan Lee, Maxine Tan

Different types of Convolutional Neural Networks (CNNs) have been applied to detect cancerous lung nodules from computed tomography (CT) scans.

Classification Computed Tomography (CT) +2

Theoretical and Experimental Analysis on the Generalizability of Distribution Regression Network

no code implementations5 Nov 2018 Connie Kou, Hwee Kuan Lee, Jorge Sanz, Teck Khim Ng

However, in Kou et al. (2018) and some other works on distribution regression, there is a lack of comprehensive comparative study on both theoretical basis and generalization abilities of the methods.

regression Time Series Analysis

A Compact Network Learning Model for Distribution Regression

no code implementations13 Apr 2018 Connie Kou, Hwee Kuan Lee, Teck Khim Ng

Despite the superior performance of deep learning in many applications, challenges remain in the area of regression on function spaces.

regression

Flipped-Adversarial AutoEncoders

no code implementations13 Feb 2018 Jiyi Zhang, Hung Dang, Hwee Kuan Lee, Ee-Chien Chang

We propose a flipped-Adversarial AutoEncoder (FAAE) that simultaneously trains a generative model G that maps an arbitrary latent code distribution to a data distribution and an encoder E that embodies an "inverse mapping" that encodes a data sample into a latent code vector.

Distribution Regression Network

no code implementations ICLR 2018 Connie Kou, Hwee Kuan Lee, Teck Khim Ng

We introduce our Distribution Regression Network (DRN) which performs regression from input probability distributions to output probability distributions.

regression

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