Enhancing Apple Cultivar Classification Using Multiview Images. 2024

Silvia Krug, and Tino Hutschenreuther
Department of Computer and Electrical Engineering, Mid Sweden University, Holmgatan 10, 851 70 Sundsvall, Sweden.

Apple cultivar classification is challenging due to the inter-class similarity and high intra-class variations. Human experts do not rely on single-view features but rather study each viewpoint of the apple to identify a cultivar, paying close attention to various details. Following our previous work, we try to establish a similar multiview approach for machine-learning (ML)-based apple classification in this paper. In our previous work, we studied apple classification using one single view. While these results were promising, it also became clear that one view alone might not contain enough information in the case of many classes or cultivars. Therefore, exploring multiview classification for this task is the next logical step. Multiview classification is nothing new, and we use state-of-the-art approaches as a base. Our goal is to find the best approach for the specific apple classification task and study what is achievable with the given methods towards our future goal of applying this on a mobile device without the need for internet connectivity. In this study, we compare an ensemble model with two cases where we use single networks: one without view specialization trained on all available images without view assignment and one where we combine the separate views into a single image of one specific instance. The two latter options reflect dataset organization and preprocessing to allow the use of smaller models in terms of stored weights and number of operations than an ensemble model. We compare the different approaches based on our custom apple cultivar dataset. The results show that the state-of-the-art ensemble provides the best result. However, using images with combined views shows a decrease in accuracy by 3% while requiring only 60% of the memory for weights. Thus, simpler approaches with enhanced preprocessing can open a trade-off for classification tasks on mobile devices.

UI MeSH Term Description Entries

Related Publications

Silvia Krug, and Tino Hutschenreuther
November 2012, IEEE transactions on image processing : a publication of the IEEE Signal Processing Society,
Silvia Krug, and Tino Hutschenreuther
August 2016, Applied optics,
Silvia Krug, and Tino Hutschenreuther
March 2024, IEEE transactions on cybernetics,
Silvia Krug, and Tino Hutschenreuther
July 2023, Diagnostics (Basel, Switzerland),
Silvia Krug, and Tino Hutschenreuther
January 2018, Computational intelligence and neuroscience,
Silvia Krug, and Tino Hutschenreuther
February 2024, Journal of imaging informatics in medicine,
Silvia Krug, and Tino Hutschenreuther
December 2017, IEEE transactions on image processing : a publication of the IEEE Signal Processing Society,
Silvia Krug, and Tino Hutschenreuther
October 2023, Applied optics,
Silvia Krug, and Tino Hutschenreuther
May 2013, IEEE transactions on image processing : a publication of the IEEE Signal Processing Society,
Silvia Krug, and Tino Hutschenreuther
December 2013, Journal of the Optical Society of America. A, Optics, image science, and vision,
Copied contents to your clipboard!