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Data Augmentation for Plant Classification - 2017

Data Augmentation For Plant Classification

Research Area:  Machine Learning

Abstract:

Data augmentation plays a crucial role in increasing the number of training images, which often aids to improve classification performances of deep learning techniques for computer vision problems. In this paper, we employ the deep learning framework and determine the effects of several data-augmentation (DA) techniques for plant classification problems. For this, we use two convolutional neural network (CNN) architectures, AlexNet and GoogleNet trained from scratch or using pre-trained weights. These CNN models are then trained and tested on both original and data-augmented image datasets for three plant classification problems: Folio, AgrilPlant, and the Swedish leaf dataset. We evaluate the utility of six individual DA techniques (rotation, blur, contrast, scaling, illumination, and projective transformation) and several combinations of these techniques, resulting in a total of 12 data-augmentation methods. The results show that the CNN methods with particular data-augmented datasets yield the highest accuracies, which also surpass previous results on the three datasets. Furthermore, the CNN models trained from scratch profit a lot from data augmentation, whereas the fine-tuned CNN models do not really profit from data augmentation. Finally, we observed that data-augmentation using combinations of rotation and different illuminations or different contrasts helped most for getting high performances with the scratch CNN models.

Keywords:  

Author(s) Name:  Pornntiwa Pawara, Emmanuel Okafor, Lambert Schomaker & Marco Wiering

Journal name:  

Conferrence name:  International Conference on Advanced Concepts for Intelligent Vision Systems

Publisher name:  Springer

DOI:  10.1007/978-3-319-70353-4_52

Volume Information: