title: Improving robustness of image recognition through artificial image augmentation

authors: Herbert, Callum

subjects: Deep learning

abstract: Deep learning based computer vision technologies can offer a number of advantages over manual labour inspection methods such as reduced operational costs and efficiency improvements. However, they are known to be unreliable in certain situations, especially when input images contain augmentations such as occlusion or distortion that computer vision models have not been trained on. While augmentations can be mitigated by controlling some situations, this is not always possible, especially in outdoor environments.

To address this issue, one common approach is supplemental robustness training using augmented training data, which involves training models on images containing the expected augmentations to improve performance. However, this approach requires collection of a substantial volume of augmented images for each expected augmentation, making it time-consuming and costly depending on the difficulty involved in reproducing each augmentation.
This thesis explores the viability of using artificially rendered augmentations on unaugmented images as a substitute for the manual collection and preparation of naturally augmented data for image recognition and object detection models. Specifically, this thesis recreates nine environmental augmentations that commonly occur within outdoor environments and evaluates their impact on model performance on three datasets.
The findings of this thesis indicate potential for using artificially generated augmentations as substitutes for naturally occurring augmentations. It is anticipated that further research in this area will enable more reliable image recognition and object detection in less controllable environments, thus improving the results of these technologies in uncertain situations.

text: Improving robustness of image recognition through artificial image augmentation Deep learning based computer vision technologies can offer a number of advantages over manual labour inspection methods such as reduced operational costs and efficiency improvements. However, they are known to be unreliable in certain situations, especially when input images contain augmentations such as occlusion or distortion that computer vision models have not been trained on. While augmentations can be mitigated by controlling some situations, this is not always possible, especially in outdoor environments.

To address this issue, one common approach is supplemental robustness training using augmented training data, which involves training models on images containing the expected augmentations to improve performance. However, this approach requires collection of a substantial volume of augmented images for each expected augmentation, making it time-consuming and costly depending on the difficulty involved in reproducing each augmentation.
This thesis explores the viability of using artificially rendered augmentations on unaugmented images as a substitute for the manual collection and preparation of naturally augmented data for image recognition and object detection models. Specifically, this thesis recreates nine environmental augmentations that commonly occur within outdoor environments and evaluates their impact on model performance on three datasets.
The findings of this thesis indicate potential for using artificially generated augmentations as substitutes for naturally occurring augmentations. It is anticipated that further research in this area will enable more reliable image recognition and object detection in less controllable environments, thus improving the results of these technologies in uncertain situations.

year: 2023

title: Strangers, sojourners, selves: the intercultural communication experiences of ethnic Chinese students in western tertiary education

authors: Holmes, Prue

abstract: This study describes the intercultural communication experiences of Confucian heritage culture students in a western tertiary setting. Exploring the intercultural communication encounters enabled an understanding of how these ethnic Chinese students socially constructed their everyday lives. In addition, the study focused on their reconstruction and renegotiation of cultural identity and the extent to which they built a third culture. Thus, it is a study of intercultural communication, culture, and cultural identity.

Principles of ethnography and inductive inquiry provided the exploratory means to uncover these intercultural communication experiences. The context of this study was a university in New Zealand, and the 14 participants were from China, Malaysia, Hong Kong, and Taiwan. Some were newly arrived. Others were permanent residents. Prolonged investigation in the field enabled themes to emerge, providing a thick description of the participants’ lifeworlds and the basis for theory building.

The contribution of this thesis is in the following key areas: the enactment of intercultural communication in the negotiation of a new learning environment; the process of adaptation and accommodation of the cultural other; cultural identity change as participants negotiate the host environment; and the initiation of third culture building. Participants from China, who had or sought permanent residence, showed adaptation and renegotiation of social worlds and the desire to acculturate. By contrast, the undergraduate students from Malaysia, who saw their future in their first cultures, demonstrated a going back mentality and less desire to accommodate and understand the host society. Thus, the study contributes towards an understanding of cultural difference as it created, maintained, and reconstructed and renegotiated in intercultural communication.

text: Strangers, sojourners, selves: the intercultural communication experiences of ethnic Chinese students in western tertiary education This study describes the intercultural communication experiences of Confucian heritage culture students in a western tertiary setting. Exploring the intercultural communication encounters enabled an understanding of how these ethnic Chinese students socially constructed their everyday lives. In addition, the study focused on their reconstruction and renegotiation of cultural identity and the extent to which they built a third culture. Thus, it is a study of intercultural communication, culture, and cultural identity.

Principles of ethnography and inductive inquiry provided the exploratory means to uncover these intercultural communication experiences. The context of this study was a university in New Zealand, and the 14 participants were from China, Malaysia, Hong Kong, and Taiwan. Some were newly arrived. Others were permanent residents. Prolonged investigation in the field enabled themes to emerge, providing a thick description of the participants’ lifeworlds and the basis for theory building.

The contribution of this thesis is in the following key areas: the enactment of intercultural communication in the negotiation of a new learning environment; the process of adaptation and accommodation of the cultural other; cultural identity change as participants negotiate the host environment; and the initiation of third culture building. Participants from China, who had or sought permanent residence, showed adaptation and renegotiation of social worlds and the desire to acculturate. By contrast, the undergraduate students from Malaysia, who saw their future in their first cultures, demonstrated a going back mentality and less desire to accommodate and understand the host society. Thus, the study contributes towards an understanding of cultural difference as it created, maintained, and reconstructed and renegotiated in intercultural communication.

year: 2000

title: 'Te Kawau Mārō' The Role of Media in Revitalising Te Reo Māori

authors: Hill, Jessie Lee Anahira

subjects: Media

abstract: The intent of this thesis is to investigate the role media plays in relation to the revitalisation of te reo Māori in Aotearoa/New Zealand society. This is essential as the media's latent potential is often underestimated and therefore underutilised. 

For Māori and inevitably te reo Māori, media has been a topic of heated contestation for over a century. It is postulated that throughout this troubled history, media's influence has contributed to an erosion of te reo Māori and then conversely, since the late 20th century, its attempted revival. The journey of te reo Māori from past to present may be likened to a voyage of a traditional 'waka hourua' (voyaging or double hulled canoe). 'Nga ngaru e toru' ('three waves') illustrates the three stages that I have defined as catalysts significantly impacting te reo Māori. 

Grounded firmly in a Kaupapa Māori methodological and theoretical framework based on careful research and intimate cultural knowledge, my innovative approaches to language revitalisation entitled the Tapatoru (triangle) Model 1 and Tapatoru Model 2 will be introduced and explained. These distinct language revitalisation paradigms illustrate the core ingredients needed in effective language revival and illustrate the positioning and function of the media within these strategic models.

text: 'Te Kawau Mārō' The Role of Media in Revitalising Te Reo Māori The intent of this thesis is to investigate the role media plays in relation to the revitalisation of te reo Māori in Aotearoa/New Zealand society. This is essential as the media's latent potential is often underestimated and therefore underutilised. 

For Māori and inevitably te reo Māori, media has been a topic of heated contestation for over a century. It is postulated that throughout this troubled history, media's influence has contributed to an erosion of te reo Māori and then conversely, since the late 20th century, its attempted revival. The journey of te reo Māori from past to present may be likened to a voyage of a traditional 'waka hourua' (voyaging or double hulled canoe). 'Nga ngaru e toru' ('three waves') illustrates the three stages that I have defined as catalysts significantly impacting te reo Māori. 

Grounded firmly in a Kaupapa Māori methodological and theoretical framework based on careful research and intimate cultural knowledge, my innovative approaches to language revitalisation entitled the Tapatoru (triangle) Model 1 and Tapatoru Model 2 will be introduced and explained. These distinct language revitalisation paradigms illustrate the core ingredients needed in effective language revival and illustrate the positioning and function of the media within these strategic models.

year: 2010