RESUMO
This paper presents an adaptive focus stacking method for large depth-of-field (DOF) 3D microscopic structured-light imaging systems. Conventional focus stacking methods typically capture images under a series of pre-defined focus settings without considering the attributes of the measured object. Therefore, it is inefficient since some of the focus settings might be redundant. To address this problem, we first employ the focal sweep technique to reconstruct an initial rough 3D shape of the measured objects. Then, we leverage the initial 3D data to determine effective focus settings that focus the camera on the valid areas of the measured objects. Finally, we reconstruct a high-quality 3D point cloud using fringe images obtained from these effective focus settings by focus stacking. Experimental results demonstrate the success of the proposed method.
RESUMO
Background: Governmental and non-governmental organizations across medical, legal, and psychosocial sectors providing care to survivors of gender-based violence (GBV) and their families rapidly digitalized services during the COVID-19 pandemic. GBV prevention/response services working with women and children who are forcibly displaced and/or living in low-and-middle income countries (LMIC) were no exception to the rapid digitalization trend. Literature is lacking a critical synthesis of best practices and lessons learned since digitalization replaced major operations involved in GBV prevention/response.Objective: This research qualitatively investigated how GBV service providers, located in a range of socio-political settings, navigated the process of digitalizing GBV prevention/response during the COVID-19 crisis.Method: Semi-structured key informant interviews (KII) with GBV service providers in varied sectors were implemented virtually (2020-2021) in Brazil, Guatemala, Iraq, and Italy (regarding forcibly displaced women/girls for the latter). Participants were recruited using purposive and snowball sampling. Interview guides covered a range of topics: perceived changes in violence and service provision, experiences with virtual services, system coordination, and challenges. The KIIs were conducted in Portuguese, Spanish, Arabic, and Italian. Interviews were audio-recorded, transcribed, and translated into English. The research team conducted thematic analysis within and between countries using a structured codebook of data driven and theory driven codes.Results: Major themes concerned the: (1) spectrum of services that were digitalized during the COVID-19 crisis; (2) gender digital divide as a barrier to equitable, safe, and effective service digitalization; (3) digital violence as an unintended consequence of increased digitalization across social/public services.Conclusion: Digitalization is a balancing act with respect to (1) the variety of remotely-delivered services that are possible and (2) the access/safety considerations related to the gender digital divide and digital violence.
Digitalization occurs when products and services are converted to digital forms; violence prevention/response services working with women and children who are forcibly displaced and/or living in low-and-middle income countries were no exception to the rapid trend of digitalization during the COVID-19 crisis.Using key informant interviews with service providers working in violence prevention and response sectors in Brazil, Guatemala, Iraq, and in Italy regarding forcibly displaced women/girls, we investigated the rapid digitalization of gender-based violence prevention/response during the COVID-19 crisis.The effectiveness, safety, and equitability of digitalized violence prevention/response services depends on how well they are balanced vis-a-vis the gender digital divide and risk of digital GBV.