# Less-forgetful Learning for Domain Expansion in Deep Neural Networks Source: [Less-forgetful Learning for Domain Expansion in Deep Neural Networks]() Collection index: [llms.txt]() Data updated: 2025-10-25T20:50:10.530Z Authors: Heechul Jung, Jeongwoo Ju, Minju Jung, Junmo Kim Published: 2017-11-16T07:04:51.000Z ## Abstract Expanding the domain that deep neural network has already learned without accessing old domain data is a challenging task because deep neural networks forget previously learned information when learning new data from a new domain. In this paper, we propose a less-forgetful learning method for the domain expansion scenario. While existing domain adaptation techniques solely focused on adapting to new domains, the proposed technique focuses on working well with both old and new domains without needing to know whether the input is from the old or new domain. First, we present two naive approaches which will be problematic, then we provide a new method using two proposed properties for less-forgetful learning. Finally, we prove the effectiveness of our method through experiments on image classification tasks. All datasets used in the paper, will be released on our website for someone's follow-up study. ## Recorded benchmark results A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage. ## Original sources and implementation [Original paper]() [PDF]()